document_title: List of abbreviations in oil and gas exploration and production

question_text: what does fid mean in oil and gas

question_tokens: what does fid mean in oil and gas

text: #[edit]

text:
1C – Proved Contingent Resources
1P – Proven reserves
2C – Proved and probable Contingent Resources
2D – two-dimensional (geophysics)
2P – proved and probable reserves
3C – three components seismic acquisition (x,y and z)
3C – Proved, probable and possible Contingent Resources
3D – three-dimensional (geophysics)
3P – proved, probable and possible reserves
4D – multiple 3Ds acquired over time (the 4th D) over the same area with the same parameters (geophysics)
8rd – eight round (describes the number of revolutions per inch of pipe thread)

text: A[edit]

text:
A – Appraisal (well)
AADE – American Association of Drilling Engineers[1]
AAPG – American Association of Petroleum Geologists[2]
AAPL – American Association of Professional Landmen
AAODC – American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC)
AAV – Annulus Access Valve
ABAN – Abandonment, (also as AB and ABD)
ABSA – Alberta Boilers Safety Association
ACHE – Air-Cooled Heat Exchanger
ACOU – Acoustic
ACQU – Acquisition log
ADE - Advanced Decision Making Environment
ADEP – Awaiting Development with Exploration Potential, referring to an asset
ADROC – advanced rock properties report
ADT – Applied Drilling Technology, ADT log
ADM - Advanced Diagnostics Module (Fieldbus)
AFE – Authorization For Expenditure, a process of submitting a business proposal to investors
AFP – Active Fire Protection
AGRU – acid gas removal unit
AGT - Agitator, used in Drilling
AHBDF – along hole (depth) below Derrick floor
AHD – along hole depth
AHU – Air Handling Unit
AICD – autonomous inflow control device
AIR – Assurance Interface and Risk
AIRG – airgun
AIRRE – airgun report
AIT – array induction tool
AL – appraisal license (United Kingdom), a type of onshore licence issued before 1996
ALAP – as low as possible (used along with density of mud)
ALARP – as low as reasonably practicable
ALC – aertical seismic profile acoustic log calibration report
ALLMS - Anchor Leg Load Monitoring System
ALQ – Additional Living Quarters
ALR – acoustic log report
aMDEA – activated methyldiethanolamine
AMS – auxiliary measurement service log; Auxiliary Measurement Sonde (temperature)
AMSL – above mean sea level
AMI – area of mutal interest
AMV – annulus master valve[3]
ANACO – analysis of core logs report
ANARE – analysis report
AOF – absolute open flow
AOFP – absolute open-flow potential
AOL – Arrive on location
APD – application for permit to drill
API – American Petroleum Institute: organization which sets unit standards in the oil and gas industry
APPRE – appraisal report
APS – active pipe support
APWD – annular pressure while drilling (tool) [2]
ARACL – array acoustic log
ARESV – analysis of reservoir
ARI – azimuthal resistivity image
ARRC – array acoustic report
ART – actuator running tool
AS – array sonic processing log
ASI – ASI log
ASME – American Society of Mechanical Engineers
ASOG - Activity Specific Operating Guidelines
ASP – array sonic processing report
ASP – Alkali-Surfactant-Polymer
ASTM – American Society for Testing and Materials
ASCSSV – annulus surface controlled sub-surface valve[3]
ASV – Anti Surge Valve
ASV – Annular Safety Valve
ASV – Accommodation and Support Vessel
ATD – application to drill
ATU - Auto Top-up Unit
AUV – authonomus underwater vehicle
AV – annular velocity or apparent viscosity
AVGMS – Annulus Vent Gas Monitoring System
AVO – amplitude versus offset (geophysics)
AWB/V – annulus wing block/valve (XT)
AWO – approval for well operation
ATM – at the moment

text: B[edit]

text:
B or b – prefix denoting a number in billions
BA – Bottom Assembly (of a riser)
bbl – barrel
BBG – Buy Back Gas
BBSM – behaviour-based safety management
BCPD – barrels condensate per day
Bcf – billion cubic feet (of natural gas)
Bcfe – billion cubic feet (of natural gas equivalent)
BDF – below derrick floor
BDL – bit data log
BDV – blowdown valve
BGL – borehole geometry log
BGL – below ground level (used as a datum for depths in a well)
BGS – British Geological Survey
BGT – borehole geometry tool
BGWP – base of ground-water protection
BH – bloodhound
BHA – bottom hole assembly (toolstring on coiled tubing or drill pipe)
BHC – BHC gamma ray log
BHCA – BHC acoustic log
BHCS – BHC sonic log
BHCT – bottomhole circulating temperature
BHL – borehole log
BHP – bottom hole pressure
BHPRP – borehole pressure report
BHSRE – bottom hole sampling report
BHSS – borehole seismic survey
BHT – bottomhole temperature
BHTV – borehole television report
BINXQ – bond index quicklook log
BIOR – biostratigraphic range log
BIORE – biostratigraphy study report
BSLM - Bend Stiffener Latch Mechanism
BIVDL – BI/DK/WF/Casing collar locator/gamma ray log
BLI – bottom of logging interval
BO – back-off log
boe – barrel(s) of oil equivalent
boed – barrel(s) of oil equivalent per day
BOEM – Bureau of Ocean Energy Management
boepd – barrel(s) of oil equivalent per day
BOB – back on bottom
BOD – Biological Oxygen Demand
BOM – bill of materials
BOP – blowout preventer
BOP – bottom of pipe
BOPD – barrel(s) of oil per day
BOPE – blowout prevention equipment
BOREH – borehole seismic analysis
BOSIET – basic offshore safety induction and emergency training
BOTHL – bottom hole locator log
BOTTO – bottom hole pressure/temperature report
BP – bridge plug
BPD – barrels per day
BPH – barrels per hour
BPFL – borehole profile log
BPLUG – baker plug
BPO - By-Pass Override
BPV – back pressure valve (goes on the end of coiled tubing a drill pipe tool strings to prevent fluid flow in the wrong direction)
BQL – B/QL log
BRPLG – bridge plug log
BRT – below rotary table (used as a datum for depths in a well)
BS – Bend Stiffener
BS – bumper sub
BS – Booster Station
BSEE – US: Bureau of Safety and Environmental Enforcement[4] (formerly the MMS)
BSG – Black Start Generator
BSR – blind shear rams (blowout preventer)
BSML – below sea mean level
BS&W – basic sediments and water
BT – buoyancy tank
BTEX – benzene, toluene, ethyl-benzene and xylene
BTHL – bottom hole log
BTO/C – break to open/close (valve torque)
BTU – British thermal units
BU – bottom up
BUL – bottom up lag
BUR – build-up rate
BVO – ball valve operator
bwd – barrels of water per day (often used in reference to oil production)
bwpd – barrels of water per day

text: C[edit]

text:
C&E – well completion and equipment cost
C&S – cased and suspended
C1 – methane
C2 – ethane
C3 – propane
C4 – butane
C6 – hexanes
C7+ – heavy hydrocarbon components
CA – core analysis log
CAAF - Contract Authorization Approval Form
CALI – calliper log
CALOG – circumferential acoustic log
CALVE – calibrated velocity log data
CAODC – Canadian Association of Oilwell Drilling Contractors
CAPP – Canadian Association of Petroleum Producers
CART – cam-actuated running tool (housing running tool)
CART – Cap Replacement Tool
CAS – casing log
CAT – Connector Actuating Tool
CB – core barrel
CBIL – CBIL log
CBL – cement bond log (measurement of casing cement integrity)
CBM – choke bridge module – XT choke
CBM – conventional buoy mooring
CBM – coal-bed methane
CCHT – core chart log
CCL – casing collar locator (in perforation or completion operations, the tool provides depths by correlation of the casing string's magnetic anomaly with known casing features)
CCLBD Construction / Commissioning Logic Block Diagram
CCLP – casing collar locator perforation
CCLTP – casing collar locator through tubing plug
CD – core description
CDATA – core data
CDIS – CDI synthetic seismic log
CDU – control distribution unit
CDU – crude distillation unit
CDP – common depth point (geophysics)
CDP – comprehensive drilling plan
CDRCL – compensated dual resistivity cal. log
CDFT – critical device function test
CE – CE log
CERE – cement remedial log
CECAN – CEC analysis
CEME – cement evaluation
CER - Central Electrical/Equipment Room
CET – cement evaluation tool
CF – completion fluid
CFD – computational fluid dynamics
CFU - Compact flotation unit
CGEL – CG EL log
CGL – core gamma log
CGPH – core graph log
CGR – condensate gas ratio
CGTL – compact gas to liquids (production equipment small enough to fit on a ship)
CHCNC – CHCNC gamma ray casing collar locator
CHDTP – calliper HDT playback log
CHECK – checkshot and acoustic calibration report
CHESM – contractor, health, environment and safety management
CHF - Casing Head Flange
CHKSR – checkshot survey report
CHKSS – checkshot survey log
CHOPS – Cold Heavy Oil Production with Sand
CHP – casing hanger pressure (pressure in an annulus as measured at the casing hanger)
CHOTO - Commissioning, Handover & Takeover
CHROM – chromatolog
CHRT – casing hanger running tool
CIBP – cast iron bridge plug
CIDL – chemical injection downhole lower
CIDU – chemical injection downhole upper
CIL – chemical injection line
CILD – conduction log
CIMV – chemical injection metering valve
CIRC – CIRCULATION
CITHP – closed-in tubing head pressure (tubing head pressure when the well is shut in)
CIV – chemical injection valve
CL – core log
CLG – core log and graph
CM – choke module
CMC – crown mounted compensators
CMP – common midpoint (geophysics)
CMR – Combinable Magnetic Resonance (NMR log tool) [3][4]
CND – compensated neutron density
CNFDP – CNFD true vertical-depth playback log
CNGR – compensated neutron gamma-ray log
CNL – compensated neutron log
CNLFD – CNL/FDC log
CNS – Central North Sea
CNCF – field-normalised compensated neutron porosity
CNR – Canadian Natural Resoures
CO – change out (ex. from rod equipment to casing equipment)
COA – Conditions of Approval
COC – Certificate of Conformance
COD – Chemical Oxygen Demand
COL – collar log
COMAN – compositional analysis
COML – compaction log
COMP – composite log
COMPR – completion program report
COMPU – computest report
COMRE – completion record log
CONDE – condensate analysis report
CONDR – continuous directional log
CORAN – core analysis report
CORE – core report
CORG – corgun log
CORIB – coriband log
CORLG – correlation log
COROR – core orientation report
COW – Control of Work
COXY – carbon/oxygen log
CP – Cathodic Protection
cP – centiPoise (Viscosity unit of measurement)
CPI separator – corrugated plate interceptor
CPI – CPI log (computer-processed interpretation), CPI (corrugated plate interceptor)
CPICB – CPI coriband log
CPIRE – CPI report
CRA – corrosion-resistant alloy
CRET – cement retainer setting log
CRP – control riser platform
CRP – common/central reference point (subsea survey)
CRT – Clamp Replacement tool
CRT – Casing Running Tool
CSE – Confined Space Entry
CsF – Caesium formate (coincidentally also an acronym of the sole large-scale supplier of caesium formate brine, cabot specialty fluids.)
CSG – Coal Seam Gas
csg – casing
CSHN – cased-hole neutron log
CSI – Combinable Seismic Imager (VSP) log (Schlumberger)
CSMT – core sampler tester log
CSO – complete seal-off
CSPG – Canadian Society of Petroleum Geologists
CSR - Corporate Social Responsibility
CST – Chronological Sample Taker log (Schlumberger)
CSTAK – core sample taken log
CSTRE – CST report
CSU – Commissioning and Start Up
CSUG – Canadian Society for Unconventional Gas
CT – coiled tubing
CTD – coiled tubing drilling
CTCO – coiled tubing clean-out
CTLF – coiled tubing lift frame
CTLF – compensated tension lift frame
CTOD – crack tip opening displacement
CTP – Commissioning Test Procedure
CTRAC – cement tracer log
CUI – Corrosion Under Insulation
CUT – cutter log
CUTTD – cuttings description report
CWOP – complete well on paper
CWOR – completion work over riser
X/O – X-Over,Cross Over
CYBD – cyberbond log
CYBLK – cyberlook log
CYDIP – cyberdip log
CYDN – cyberdon log
CYPRO – cyberproducts log

text: D[edit]

text:
D - Development
D&C – drilling and completions
D&I - direction and inclinitation (MWD borehole deviation survey) [5]
DAC – dipole acoustic log
DARCI – Darci log
DAS - Data Acquisition System
DAT – wellhead housing drill-ahead tool
DAZD – dip and azimuth display
DBB – double block and bleed
DBP - drillable bridge plug
DC – drill centre
DC – drill collar(s)
DCAL – dual caliper log
DCC – Distance cross course
DCS – Distributed Control System
DD – directional driller or directional drilling
DDC - daily drilling cost
DDC - De-watering and Drying Contract
DDBHC – DDBHC waveform log
DDET – depth determination log
DDM – Derrick drilling machine (a.k.a. top drive)
DDNL – dual det. neutron life log
DDPT – drill data plot log
DDPU - Double drum pulling unit
DEA - diethanol amine
DECC – Department for Energy and Climate Change (UK)
DECT – decay time
DEFSU – definitive survey report
DEH - Direct Electrical Heating
DELTA – delta-T log
DEN – density log
DEPAN – deposit analysis report
DEPC – depth control log
DEPT – depth
DESFL – deep induction SFL log
DEV – development well, Lahee classification
DEVLG – deviation log
DEXP – D-exponent log
DF – Derrick floor
DFI – Design, Fabrication and Installation résumé
DFIT - Diagnostic Fracture Injection Test
DFR – drilling factual report
DGP – dynamic geohistory plot (3D technique)[5]
DH – drilling history
DHC – depositional history curve
DHSV – downhole safety valve
DHPG - downhole pressure gauge
DHPTT – downhole pressure/temperature transducer
DIBHC – DIS BHC log
DIEGR – dielectric gamma ray log
DIF – drill in fluids
DIL – dual-induction log
DILB – dual-induction BHC log
DILL – dual-induction laterolog
DILLS – dual-induction log-LSS
DILSL – dual-induction log-SLS
DIM – directional inertia mechanism
DINT – dip interpretation
DIP – dipmeter log
DIPAR – dipole acoustic report
DIPBH – dipmeter borehole log
DIPFT – dipmeter fast log
DIPLP – dip lithology pressure log
DIPRE – dipmeter report
DIPRM – dip removal log
DIPSA – dipmeter soda log
DIPSK – dipmeter stick log
DIRS – directional survey log
DIRSU – directional survey report
DIS – DIS-SLS log
DISFL – DISFL DBHC gamma ray log
DISO – dual induction sonic log
DL – development license (United Kingdom), a type of onshore license issued before 1996
DLIST – dip-list log
DLL – dual laterolog (deep and shallow resistivity)
DLS – dog-leg severity (directional drilling)
DM - dry mate
DMA – dead-man anchor
DMAS - dead-man auto-shear DMAS
DMRP - Density - Magnetic Resonance Porosity (wireline tool)
DMT - Down hole Monitoring Tool
DNHO – downhole logging
DOA – delegation of authority
DOE – Department of Energy, United States
DOWRE – downhole report
DP – drill pipe
DP – dynamic positioning
DPDV – dynamically positioned drilling vessel
DPL – dual propagation log
DPLD – differential pressure levitated device (or vehicle)
DPRES – dual propagation resistivity log
DPT – deeper pool test, Lahee classification
DQLC – dipmeter quality control log
DR – dummy-run log
DR – drilling report
DRI – drift log
DRL - Drilling
DRLCT – drilling chart
DRLOG – drilling log
DRLPR – drilling proposal/progress report
DRO – Discovered Resources Opportunities
DRPG – drilling program report
DRPRS – drilling pressure
DRREP – drilling report
DRYRE – drying report
DS – Deviation survey, (also directional system)
DSCAN – DSC analysis report
DSI – dipole shear imager
DSL - digital spectralog (Western Atlas)
DSPT – cross-plots log
DST – drill-stem test
DSTG – DSTG log
DSTL – drill-stem test log
DSTND – dual-space thermal neutron density log
DSTPB – drill-stem test true vertical depth playback log
DSTR – drill-stem test report
DSTRE – drill-stem test report
DSTSM – drill-stem test summary report
DSTW – drill-stem test job report/works
DSU - drill spacing unit
DSV – diving support vessel or drilling supervisor
DTI – Department of Trade and Industry (UK) (obsolete; superseded by dBERR, which was then superseded by DECC)
DTPB – CNT true vertical-depth playback log
DTT – depth to time
DVT - Differential Valve Tool (for cementing multiple stages)
DWOP – drilling well on paper (a theoretical exercise conducted involving the service-provider managers)
DWQL – dual-water quicklook log
DWSS – dig-well seismic surface log
DXC – DXC pressure pilot report

text: E[edit]

text:
E – Exploration
E&A – Exploration and Appraisal
E&I – Electrical and Instrumentation
E&P – Exploration and Production
EA – Exploration Asset
EAGE – European Association of Geoscientists & Engineers[6]
ECD – Equivalent Circulating Density
EDG/EDGE - Emergency Diesel Generator
ECMS – Electrical Control and Monitoring System
ECP – External Casing Packer
ECRD – Electrically Controlled Release Device (for abandoning stuck wireline tool from cable)
ECT - External Cantilevered Turret
EDP – Exploration Drilling Program Report
EDP – Emergency Disconnect Package
EDR – Exploration Drilling Report
EDR – Electronic Drilling Recorder
EDS – Emergency Disconnection Sequence
EEHA - Electrical Equipment for Hazardous Areas (IECEx)
EFL – Electrical Flying Lead
EFR – Engineering Factual Report
EHT – Electric Heat Trace
EGMBE – Ethylene Glycol Mono-Butyl Ether
EHU - Electro-Hydraulic Unit
EIA - Environmental Impact Assessment
ELEC TECH - Electronics Technician (See also: ETech)
ELT – Economic Limit Test
EL – Electric Log
EM – EMOP Log
EMCS - Energy Management and Control Systems
EMD – Equivalent Mud Density
EMG – Equivalent Mud Gradient
EMOP – EMOP Well Site Processing Log
EMP – Electromagnetic Propagation Log
EMS - Environment measurement sonde (wireline multi-caliper) [6]
EMW – Equivalent Mud Weight
EN PI – Enhanced Productivity Index Log
ENG – Engineering Log
ENGF – Engineer Factual Report
ENGPD – Engineering Porosity Data
Eni – Ente Nazionale Idrocarburi S.p.A. (Italy)[7]
ENJ – Enerjet Log
ENMCS - Electrical Network Monitoring and Control System
EOFL – End of Field Life
EOR – Enhanced Oil Recovery
EOT – End of Tubing
EOT - Electric Overhead Travelling
ELV - Extra Low Voltage
EOW – End Of Well Report
EPCM/I – Engineering Procurement Construction & Management/Installation
EPCU – Electrical Power Conditioning Unit
EPIDORIS – Exploration and Production Integrated Drilling Operations and Reservoir Information System
EPL – EPL Log
EPLG – Epilog
EPLPC – EPL-PCD-SGR Log
EPS – Early Production System
EPT – Electromagnetic Propagation
EPU – Electrical Power Unit
EPTNG – EPT-NGT Log
EPV - Early Production Vessel
ER(D) – Extended Reach (Drilling)
ERT – Emergency Response Training
ESD – Emergency Shut-Down
ESHIA - Environmental, Social and Health Impact Assessment
ESIA - Environmental and Social Impact Assessment
ESP – Electric Submersible Pump
ETAP – Eastern Trough Area Project
ETD – External Turret Disconnectable
ETECH – Electronics Technician (See also: Elec Tech)
ETTD – Electromagnetic Thickness Test
ETU – Electrical Test Unit
EUE – External-upset-end (tubing connection)
EUR – Estimated Ultimate Recovery
EVARE – Evaluation Report
EWMP - Earthworks/Electrical Works/Excavation Works Management Plan
EWR – End Of Well Report
EXL – or XL, Exploration Licence (United Kingdom), a type of onshore licence issued between the First Onshore Licensing Round (1986) and the Sixth (1992)
EZSV – EZSV Log

text: F[edit]

text:
FAC – factual report
FAC - first aid case
FACHV – four-arm calliper log
FANAL – formation analysis sheet log
FAT – factory acceptance testing
FBE – fusion-bonded epoxy
FC – float collar
FCGT - Flood Clean Gauge Test
FCP – final circulating pressure
FCV - Flow Control Valve
FCVE – F-curve log
FDC – formation density log
FDF - Forced Draft Fan
FDP – Field Development Plan
FDS – functional design specification
FEED – front-end engineering design
FER – field equipment room
FEWD – formation evaluation while drilling
FFAC – formation factor log
FFM – full field model
FG - Fiberglass
FGHT - Flood Gauge Hydrotest
FRP - Fiberglass Reinforced Plastics
FGEOL – final geological report
FH – full-hole tool joint
FI – final inspection
FID – final investment decision
FID - flame ionisation detection
FIL – FIL log
FI(M) – free issue (materials)
FINST – final stratigraphic report
FINTP – formation interpretation
FIP – flow-induced pulsation
FIT – fairing intervention tool
FIT – fluid identification test
FIT – formation integrity test
FIT – formation interval tester
FIV – flow-induced vibration
FIV – formation isolation valve
FJC - Field Joint Coating
FL – F log
FLAP - fluid level above pump
FLDF - Flying Lead Deployment Frame
FLIV – flowline injection valve
FLIV – flowline isolation valve
FLET - Flowline End Termination
aFLET - Actuated Flowline End Termination
FLNG - Floating liquefied natural gas
FLOG – FLOG PHIX RHGX Log
FLOPR – flow profile report
FLOT – flying lead orientation tool
FLOW – flow and buildup test report
FLRA – field-level risk assessment
FLS – fluid sample
FLT – fault (geology)
FMEA – failure modes, & effects analysis
FMECA – failure modes, effects, and criticality analysis
FMI – formation micro imaging log (azimuthal microresistivity)
FMP – formation microscan report
FMP - Field Management Plan
FMS – formation multi-scan log; formation micro-scan log
FMT - Flow Management Tool
FMTAN – FMT analysis report
FOBOT - Fibre Optic Break Out Tray
FOET – Further Offshore Emergency Training
FOF - Face of Flange
FOSA - Field Operating Services Agreement
FOSV – full-opening safety valve
FPDM – fracture potential and domain modelling/mapping[8][9]
FPH – feet per hour
FPIT – free-point indicator tool
FPL – flow analysis log
FPLAN – field plan log
FPS - field production system
FPSO – floating production storage and offloading vessel
FPU – floating processing unit
FRA – fracture log
FRARE – fracture report
FRES – final reserve report
FS – fail safe
FSB – flowline support base
FSI – flawless start-up initiative
FSLT - Flexible Sealine Lifting Tool
FSO – floating storage offloading vessel
FSR - Facility Status Report
FT – formation tester log
FTM – fire-team member
FTP – first tranche petroleum
FTR – Function Test Report
FTRE – formation testing report
FULDI – full diameter study report
FV – funnel viscosity or float valve
FWHP – flowing well-head pressure
FWKO – free water knock-out
FWL – free water level
FWR – final well report
FWV – flow wing valve (also known as production wing valve on a xmas tree)
F_L - FNL/FEL, from north/east line

text: G[edit]

text:
G/C – Gas Condensate
GC - Gathering Center
G&P – Gathering and Processing
G&T- Gathering and Transportation
GALT - Gross Air Leak Test
GAS – Gas Log
GASAN – Gas Analysis Report
GBS – Gravity Based Structure
GBT – Gravity Base Tank
GCLOG – Graphic Core Log
GCT – GCT Log
GDAT – Geodetic Datum
GDE - Gross Depositional Environment
GDIP – Geodip Log
GDT – Gas Down To
GE – Condensate gas equivalent
GE – Ground Elevation (also [GR or GRE])
GEOCH – Geochemical Evaluation
GEODY – GEO DYS Log
GEOEV – Geochemical Evaluation Report
GEOFO – Geological & Formation Evaluation Report
GEOL – Geological Surveillance Log
GEOP – Geophone Data Log
GEOPN – Geological Well Prognosis Report
GEOPR – Geological Operations Progress Report
GEORE – Geological Report
GGRG – Gauge Ring
GIIP – Gas Initially In Place
GIH – Go In Hole
GIS – Geographic Information System
GL – Gas Lift
GL – Ground Level
GLE – Ground Level Elevation (generally in metres above mean sea level)
GLM – Gas Lift Mandrel (alternative name for Side Pocket Mandrel)
GLR – Gas Liquid Ratio
GLT – GLT Log
GLV – Gas Lift Valve
GLW –
GOC – Gas Oil Contact
GOM – Gulf of Mexico
GOP – Geological Operations Report
GOR – Gas Oil Ratio
GOSP – Gas/Oil Separation Plant
GPIT – General Purpose Inclinometry Tool (borehole survey) [7]
GPLT – Geol Plot Log
GPTG - Gallons Per Thousand Gallons
GPM- Gallons Per Mcf
GPSL – Geo Pressure Log
GR – Ground Level (or Elevation //(also [GE or GRE])) or Gamma Ray. Or Gauge Ring (measure hole size)
GRAD – Gradiometer Log
GRE – Ground Elevation (also [GR or GE])
GRLOG – Grapholog
GRN – Gamma Ray Neutron Log
GRP – Glass Reinforced Plastic
GRV – Gross Rock Volume
GRSVY – Gradient Survey Log
GS – Gas Supplier
GS – Gel Strength
GST – GST Log
GTC/G - Gas Turbine Compressor/Generator
GTL – Gas To Liquid
GTW – Gas To Wire
GUN – Gun Set Log
GWC – Gas-Water Contact
GWR – Guided Wave Radar
GWREP – Geo Well Report

text: H[edit]

text:
HAZ – Heat Affected Zone
HAZID – Hazard Identification (meeting)
HAZOP – Hazardous Operation
HBE - High Build Epoxy
HBP - Held By Production
HC – Hydrocarbons
HCAL – HRCC Calliper (in Logs)(in Inches)
HCCS – Horizontal Clamp Connection System
HCM – Horizontal Connection Module. To connect the Xmas Tree to the Manifold
HCS- High-Capacity Square mesh screens
HDA – Helideck Assistant
HDD – Horizontal Directional Drilling
HDPE - High Density Polyethylene
HDT – High Resolution Dipmeter Log
HDU - Horizontal Drive Unit
HEXT – Hex Diplog
HFE – Human Factors Engineering
HFL – Hydraulic Flying Lead
HGO - Heavy Gas Oil
HGS – High (Specific-)Gravity Solids
HH - Horse Head (on pumping unit)
HHP – Hydraulic Horsepower
HI - Hydrogen Index
HIPPS – High Integrity Pressure Protection System
HIRA - Hazard Identification and Risk Assessment
HISC – Hydrogen induced stress cracking
HL – Hook Load
HLCV - Heavy Lift Crane Vessel
HLO – Heavy Load-out (Facility)
HLO – Helicopter Landing Officer
Hmax – Maximum Wave Height
HNGS - flasked Hostile Natural Gamma-ray Spectrometry tool [8]
HOB - Hang on bridle (cable assy)
HP – Hydrostatic Pressure
HPGAG – High Pressure Gauge
HPHT – High Pressure High Temperature (same as HTHP)
HPPS – HP Pressure Log
HPU – Hydraulic Power Unit
HPWBM – High Performance Water Base Mud
HRCC – HCAl of Calliper (in Inches)
HRLA - High Resolution Laterolog Array (resistivity logging tool)
HRF- Hyperbaric Rescue Facility/Vessel
Hs – Significant Wave Height
HSE – Health, Safety and Environment or Health & Safety Executive (United Kingdom)
HSV- Hyperbaric Support Vessel
HTHP – High Temperature High Pressure (same as HPHT)
HTM – Helideck Team Member
HVDC – High Voltage Direct Current
HWDP – Heavy-Weight Drill Pipe (sometimes spelled Hevi-Wate)
HUD – Hold Up Depth
HUN - Hold Up Nipple
HUET - Helicopter Underwater Escape Training
HWDP – Heavy Weight Drill Pipe
HYPJ – Hyperjet
HYROP – Hydrophone Log

text: I[edit]

text:
I:P – Injector To Producer Ratio
IADC – International Association of Drilling Contractors
IAT - Internal Active Turret
IBC – Intermediate Bulk Container
ICoTA – Intervention and Coiled Tubing Association
ICC - Isolation Confirmation Certificate
ICD – Inflow Control Device
ICEX;IECEx - International Electrotechnical Commission System for Certification to standards relating to equipment for use in Explosive Atmospheres (EEHA)
ICP – Intermediate Casing Point
ICSS - Integrated Controls and Safety System
ICSU – Integrated Commissioning and Start Up
ICV – Interval Control Valve
ICV – Integrated Cement Volume (of Borehole)(in Cubic Metres)
ICW - InComplete Work
ID – Inner or Internal Diameter (of a tubular component such as a casing)
IDC – Intangible Drilling Costs
IDEL – IDEL Log
IEB – Induction Electro BHC Log
IEL – Induction Electrical Log
IF – Internal Flush tool joint
iFLS - intelligent fast load shedding
IGPE - Immersion Grade Phenolic Epoxy
IH – Gamma Ray Log
IHEC - Isolation of Hazardous Energy Certificate
IHUC - Installation, Hook-Up and Commissioning
IHV – Integrated Hole Volume (of Borehole) (in Cubic Metres)
IIC - Infield Installation Contractor
IJL – Injection Log
IL – Induction Log
ILI – InLine Inspection (Intelligent Pigging)
ILOGS – Image Logs
ILT - In-Line Tee
IMAG – Image Analysis Report
IMCA – International Marine Contractors Association
IMPP - Injection Molded Polypropylene Coating System
IMR - Inspection Maintenance and Repair
INCR – Incline Report
INCRE – Incline Report
INDRS – IND RES Sonic Log
INDT – INDT Log
INDWE – Individual Well Record Report
INJEC – Injection Falloff Log
INSUR – Inrun Survey Report
INVES – Investigative Program Report
IOC – International Oil Company
IOM - Installation, Operation and Maintenance Manual
IPAA – Independent Petroleum Association of America
IPC – Installed Production Capacity
IPLS – IPLS Log
IPR – Inflow Performance Relationship
IPT - Internal Passive Turret
IR – Interpretation Report
IRC – Inspection Release Certificate
IRTJ – IRTJ Gamma Ray Slimhole Log
ISF – ISF Sonic Log
ISFBG – ISF BHC GR Log
ISFCD – ISF Conductivity Log
ISFGR – ISF GR Casing Collar Locator Log
ISFL – ISF-LSS Log
ISFP – ISF Sonic True Vertical Depth Playback Log
ISFPB – ISF True Vertical Depth Playback Log
ISFSL – ISF SLS MSFL Log
ISIP - Initial Shut In Pressure
ISSOW - Integrated Safe System of Work
ISV - Infield Support Vessel
ITD - Internal Turret Disconnectable
ITR - Inspection Test Record
ITS – Influx To Surface
ITT - Internal Testing Tool. (For BOP test).
IUG - Instrument Utility Gas
IWCF – International Well Control Federation
IWOCS – Installation / Workover Control System

text: J[edit]

text:
J&A – Junked and Abandoned
JB – Junk Basket
JIB - Joint Interest Billing
JLT - J-Lay Tower
JT – Joule-Thomson (effect/valve/separator)
JTS - Joints
JU – Jack-Up drilling rig
JV - Joint Venture
JVP – Joint Venture Partners/Participants

text: K[edit]

text:
KBE – Kelly Bushing Elevation (in meters above sea level, or meters above Ground Level)
KBUG – Kelly Bushing under ground (drilling up in coal mines, West Virginia, Baker & Taylor Drilling)
KCI - Potassium Chloride (KCI) mud
KD – Kelly Down
KMW - Kill Mud Weight
KOP – Kick-Off Point Directional Drilling
KOP – Kick Off Plug
KP – Kilometre post
KRP – Kill Rate Pressure
KB – Kelly Bushing
KBG – Kelly Bushing Height above Ground Level
KT - Kill Truck

text: L[edit]

text:
LACT – Lease Automatic Custody Transfer
LAH – Lookahead
LAOT – Linear Activation Override Tool
LARS – Launch & Recovery System
LAS - Log ASCII Standard
LAT – Lowest Astronomical Tide
LCM – Lost Circulation Material
LCNLG – LDT CNL Gamma Ray Log
LD – Lay Down (tubing, rods, etc.)
LDAR - Leak Detection and Repair
LDHI - Low Dosage Hydrate Inhibitor
LDL – Litho Density Log
LDS - Leak Detection System (pipeline monitoring)
LDTEP – LDT EPT Gamma Ray Log
LEAKL – Leak Detection Log
LEPRE – Litho-Elastic Property Report
LER – Lands Eligible for Remining or Land Equivalent Ratio
LER - Local Equipment Room
LGO – Light Gas Oil
LGR – Liquid Gas Ratio
LGS – Low (specific-)Gravity Solids
LIC – License
LIB - Lead Impression Block
LINCO – Liner and Completion Progress Report
LIOG – Lithography Log
LIT – Lead Impression Tool
LITDE – Litho Density Quicklook Log
LITHR – Lithological Description Report
LITRE – Lithostratigraphy Report
LITST – Lithostratigraphic Log
LKO – Lowest Known Oil
LL – Laterolog
LMAP – Location Map
LMRP – Lower Marine Riser Package
LMV – Lower Master Valve (on a Xmas tree)
LNG – Liquefied Natural Gas
LOA – Letter of Authorisation/Agreement/Authority
LOD - Lines of Defence
LOE – Lease Operating Expenses
LOGGN – Logging Whilst Drilling
LOGRS – Log Restoration Report
LOGSM – Log Sample
LOLER – Lifting Operations and Lifting Equipment Regulations
LOT – Leak-Off Test
LOT – Linear Override Tool
LOT – Lock Open Tool
LOTO – Lock Out / Tag Out
LP – Low Pressure
LPG – Liquefied Petroleum Gas
LPH – Litres Per Hour
LPWHH – Low Pressure Well Head Housing
LRA – Lower Riser Assembly
LRP – Lower Riser Package
LSBGR – Long Spacing BHC GR Log
LSD – Land Surface Datum
LSP – Life Support Package
LSSON – Long Spacing Sonic Log
LT – Linear Time or Lag Time
L&T - Load and Test
LTC - Long Thread and Coupled
LT&C - Long Thread and Coupled
LTI(FR) – Lost Time Incident (Frequency Rate)
LTP - liner shaker, tensile bolting cloth, perforated panel backing.
LUMI – Luminescence Log
LUN - Livening Up Notice
LVEL – Linear Velocity Log
LVOT – Linear Valve Override Tool
LWD – Logging While Drilling
LWOL - Last Well on Lease
LWOP – Logging Well on Paper

text: M[edit]

text:
M or m – prefix designating a number in thousands (not to be confused with SI prefix M for mega- or m for milli)
m – metre
MAASP – Maximum Acceptable [or Allowable] Annular Surface Pressure
MAC – Multipole Acoustic Log
MACL – Multiarm Caliper Log
MAE - Major Accident Event
MAGST – Magnetostratigraphic Report
MAOP – Maximum Allowable Operating Pressure
MARA – Maralog
MAST - sonic tool (records waveform).
MAWP – Maximum Allowable Working Pressure
MBC - Membrane Brine Concentrator
Mbd – thousand barrels (of oil) per day
Mbod – thousand barrels of oil per day
Mboe – thousand barrels of oil equivalent
Mboed – thousand barrels of oil equivalent per day
MBP - Mixed Bed Polisher
Mbpd – thousand barrels of oil per day
MBR - Minimum Bend Radius
MBRO – Multi-Bore Restriction Orifices
MBT – Methylene Blue Test
MBWH - Multi Bowl Wellhead
MCD – Mechanical Completion Dossier
Mcf – thousand cubic feet of natural gas
Mcfe – thousand cubic feet of natural gas equivalent
MCHE – Main Cryogenic Heat Exchanger
MCM – Manifold Choke Module
MCP – Monocolumn Platform
MCS – Manifold & Connection System
MCS – Master Control Station
mD – millidarcy, measure of permeability, with units of area
MD – Measured Depth (see also MDSS)
MD – Measurements/Drilling Log
MDEA – Methyl Diethanolamine (aMDEA)
MDL – Methane Drainage Licence (United Kingdom), a type of onshore licence allowing natural gas to be collected "in the course of operations for making and keeping safe mines whether or not disused"
MDSS – Measured Depth Sub-Sea
MDT – Modular formation Dynamic Tester
MDR - Mud Damage Removal (acid bullheading)
MEA – Monoethanolamine
MEG – Mono-Ethylene Glycol
MEIC - Mechanical Electrical Instrumentation Commission
MEPRL – Mechanical Properties Log
MERCR – Mercury Injection Study Report
MERG – Merge FDC/CNL/Gamma Ray/Dual Laterolog/Micro SFL Log
MEST – Micro-electrical scanning tool (a dipmeter, aka. MST or FMS).[10]
MF – Marsh Funnel (mud viscosity)
MFCT – Multifinger Calliper Tool
MGL – Magnelog
MGPS - Marine Growth Prevention System
MLH – Mud Liner Hanger
MIFR – Mini Frac Log
MINL – Minilog
MIPAL – Micropalaeo Log
MIRU – Move In and Rig Up
MIST – Minimum Industry Safety Training
MIT - Mechanical Integrity Test
MIYP – Maximum Internal Yield Pressure
mKB – Meters below Kelly Bushing
ML – Microlog, or Mud Log
MLL – Microlaterolog
MLF – Marine Loading Facility
MM or mm – prefix designating a number in millions (or SI unit – millimetre)
MMbd – million barrels per day
MMbod – million barrels of oil per day
MMboe – million barrels of oil equivalent
MMboed – million barrels of oil equivalent per day
MMbpd – million barrels per day
MMcf – million cubic feet (of natural gas)
MMcfe – million cubic feet (of natural gas equivalent)
MMS – Minerals Management Service, (United States)
mmscfd – million standard cubic feet per day
MMTPA – Millions of Metric Tonnes per Annum
mmstb – million stock barrels
MNP – Merge and Playback Log
MODU – Mobile Offshore Drilling Unit
MOF – Marine Offloading Facility
MOPO - Matrix of Permitted Operations
MOPU – Mobile Offshore Production Unit
MOT – Materials/Marine Offloading Terminal
MOV - Motor Operated Valve
MPA – Micropalaeo Analysis Report
MPD – Managed Pressure Drilling
MPFM – Multi-Phase Flow Meter
MPK – Merged Playback Log
MPP – Multiphase Pump
MPQT – Manufacturing Procedure Qualification Test
MPS – Manufacturing Procedure Specification
MPSP — Maximum Predicted Surface Pressure
MPSV - Multi-Purpose Support Vessel
MPV – Multi Purpose Vessel
MQC – Multi Quick Connection Plate
MR – Marine Riser
MR - Mixed Refrigerant
MR - Morning Report
MRBP - Magna Range Bridge Plug
MRCV – Multi Reverse Circulating Valve
MRIRE – Magnetic Resonance Image Report
MRR - Material Receipt Report
MRX - Magnetic resonance expert (wireline NMR tool) [9]
MSCT – Mechanical Sidewall Coring Tool [10]
MSDS - Material Safety Data Sheet
MSFL – Micro SFL Log; Micro-Spherically Focussed Log (resistivity).
MSI – Mechanical and Structural Inspection
MSIP - Modular Sonic Imaging Platform (Sonic Scanner) [11]
MSIPC – Multi Stage inflatable Packer Collar
MSL – Mean Sea Level
MSL – Micro Spherical Log
MSS – Magnetic Single Shot
MST – MST EXP Resistivity Log
MSV - Multipurpose Support Vessel
MTBF - Mean Time Between Failure
MT - Motor Temperature; DMT Parameter for ESP motor
MTO - Material Take-Off
MTT – MTT Multi-Isotope Trace Tool
MUD – Mud Log
MUDT – Mud Temperature Log
MuSol – Mutual Solvent
MVB – Master Valve Block on Xmas Tree
MVC - Minimum Volume Commitment
MW – Mud weight
MWD – Measurement While Drilling
MWDRE – Measurement While Drilling Report
MWS – Marine Warranty Survey

text: N[edit]

text:
NACE – National Association of Corrosion Engineers
NAM - North American
NAPF – Non Aqueous Phase Fluid
NASA – Non Active Side Arm (term used in the North Sea for kill wing valve on a Xmas tree)
NAVIG – Navigational Log
NB – Nominal Bore
NCC - Normally Clean Condensate
ND - Nipple Down
NDE – Non Destructive Examination
NEFE - Non Emulsifying Iron Inhibitor (usually used with hydrochloric acid)
NEUT – Neutron Log
NFG – 'No Fucking Good' used for marking damaged equipment, not to be confused with NG being natural gas
NFI – No Further Investment
NFW – New Field Wildcat, Lahee classification
NG – Natural Gas
NGDC – National Geoscience Data Centre (United Kingdom)
NGL – Natural Gas Liquids
NGR – Natural Gamma Ray
NGRC – National Geological Records Centre (United Kingdom)
NGS – NGS Log
NGSS – NGS Spectro Log
NGT – Natural Gamma Ray Tool
NGTLD – NGT LDT QL Log
NGLQT – NGT QL Log
NGTR – NGT Ratio Log
NHDA – National Hydrocarbons Data Archive (United Kingdom)
NHPV – Net Hydrocarbon Pore Volume
NMDC - Non Magnetic Drill Collar
NMHC – Non-Methane Hydrocarbons
NMR – Nuclear Magnetic Resonance Log
NMVOC – Non-Methane Volatile Organic Compounds
NNS – Northern North Sea
NOISL – Noise Log
NOC – National Oil Company
NORM – Naturally Occurring Radioactive Material
NP – Non Producing well (as opposed to P – Producing well)
NPD – Norwegian Petroleum Directorate
NPS – Nominal Pipe Size (sometimes NS)
NPSH(R) – Net Positive Suction Head (Required)
NPV – Net Present Value
NRI - Net Revenue Interest
NRV – Non Return Valve
NPW – New Pool Wildcat, Lahee classification
NS – North Sea; can also refer to the North Slope Borough, Alaska, the North Slope, which includes Prudhoe Bay Oil Field (the largest US oil field), Kuparuk Oil Field, Milne Point, Lisburne, and Point McIntyre among others.
NTHF – Non-Toxic High Flash
NTU – Nephelometric Turbidity Unit
NUMAR – Magnetic Resonance Image Log

text: O[edit]

text:
O&G – Oil and Gas
O&M – Operations and Maintenance
O/S - Overshot, fishing tool
OBCS – Ocean Bottom Cable System
OBDTL – OBDT Log
OBEVA – OBDT Evaluation Report
OBM – Oil-Based Mud
OBO - Operated by Others
OCIMF – Oil Companies International Marine Forum
OCI - Oil Corrosion Inhibitor (Vessels)
OCL – Quality Control Log
OCTG – Oil Country Tubular Goods (oil well casing, tubing, and drill pipe)[11]
OD – Outer Diameter (of a tubular component such as casing)
ODT – Oil Down To
OFST – Offset Vertical Seismic Profile
OEM – Original Equipment Manufacturer
OFIC - Offshore Interim Completion Certificate
OLAF - Offshore Footless Loading Arm
OH – Openhole
OH – Openhole Log
OHC – Open Hole Completion
OHD - Open Hazardous Drain
OHUT - Offshore Hook-up team
OI - Oxygen Index
OIM – Offshore Installation Manager
OMRL – Oriented Micro-Resistivity Log
ONAN – Oil Natural Air Natural cooled transformer
ONNR - Office of Natural Resources Revenue (formerly MMS)
OOE – Offshore Operation Engineer (senior technical authority on an offshore oil platform)
OOIP – Original Oil In Place
OOT/S – Out of Tolerance/Straightness
OPITO - Offshore Petroleum Industry Training Organization
OPEC – Organization of Petroleum Exporting Countries
OPL – Operations Log
OPRES – Overpressure Log
OPS – Operations Report
ORICO – Oriented Core Data Report
ORM - Operability Reliability Maintainability
ORRI - Overriding Royalty Interest
OS&D - Over, Short & Damage (Report)
OSV - Offshore Supply Vessel
OT – A Well On Test
OT – Off Tree
OTDR – Optical Time Domain Reflectometry
OTIP – Operational Testing Implementation Plan
OTL – Operations Team Leader
OTSG - One-time Through Steam Generator
OWC – Oil Water Contact
OUT – Outpost, Lahee classification
OUT – Oil Up To
OVCH – Oversize Charts
OVID – Offshore Vessel Inspection Database
OWC – Oil-Water Contact

text: P[edit]

text:
P – Producing well (as opposed to NP – Non Producing)
P&A – plug and abandon (well)
PA - Producing Asset
PA - Polyamide
PA - Producing Asset with Exploration Potential
PACO - Process, Automation, Control And Optimisation
PACU - Packaged Air Conditioning Unit
PADPRT – Pressure Assisted Drillpipe Running Tool
PAGA – Public Address General Alarm
PAL – Palaeo Chart
PALYN – Palynological Analysis Report
PAR – Pre-Assembled Rack
PAU – Pre-Assembled Unit
PBDMS – Playback DMSLS Log
PBHL - Proposed Bottom Hole Location
PBR – Polished Bore Receptacle (component of a completion string)
PBD – Pason Billing System
PBTD – Plug Back Total Depth
PBU – Pressure Build Up (applies to integrity testing on valves)
PCA - Production Concession Agreement
PCB – Poly Chlorinated BiPhenyl
PCCC - Pressure Containing anti‐Corrosion Caps
PCCL – Perforation Casing Collar Locator Log
PCDC - Pressure Cased Directional (Geometry i.e. borehole survey) MWD tool
PCDM – Power and Control Distribution Module
PCKR – Packer
PCMS - Polymer Coupon Monitoring System
PCN - Process Control Network
PCO – Pre-commission Preparations (pipeline)
PCOLL – Perforation and Collar
PCP - Progressing Cavity Pump
PCPT - Piezo-Cone Penetration Test
PDC – Perforation Depth Control
PDC – Polycrystalline Diamond Compact (a type of drilling bit)
PDG/PDHG – Permanent Downhole Gauge
PDKL – PDK Log
PDKR – PDK 100 Report
PDM - Positive Displacement Motor
PDP – Proved Developed Producing (Reserves)
PDPM – Power Distribution Protection Module
PDNP – Proved Developed Not Producing
PDR - Physical Data Room
PDT - Differential Pressure Transmitter
PE - Product Emulsion
PE – Petroleum Engineer
PE – Professional Engineer
PE - Polyethylene
PEA – Palaeo Environment Study Report
PEDL – Petroleum Exploration and Development Licence (United Kingdom), introduced in the 8th Onshore Licensing Round
PEFS - Process Engineering Flow Scheme (a confusing name for P&ID)
PENL – Penetration Log
PEP – PEP Log
PERDC – Perforation Depth Control
PERFO – Perforation Log
PERM – Permeability
PERML – Permeability Log
PESGB – Petroleum Exploration Society of Great Britain
PETA – Petrographical Analysis Report
PETD – Petrographic Data Log
PETLG – Petrophysical Evaluation Log
PETPM – Petrography Permeametry Report
PETRP – Petrophysical Evaluation Report
PEX - Platform Express toolstring (resistivity, porosity, imaging)
PFD - Process Flow Diagram
PFE – Plate/Frame Heat Exchanger
PFHE – Plate Fin/Frame Heat Exchanger
PFC – PFC Log
PFPG – Perforation Plug Log
PFREC – Perforation Record Log
PG – Pressure Gauge (Report)
PGB – Permanent Guide Base
PGOR – Produced Gas Oil Ratio
PH – Phasor Log
PHASE – Phasor Processing Log
PHB - Pre-Hydrated Bentonite
PHC - Passive Heave Compensator
PHOL – Photon Log
PHPU - Platform Hydraulic Power Unit
PHPA - Partially hydrolyzed polyacrylamide (mud)
PHYFM – Physical Formation Log
PI – Productivity Index
PI – Permit Issued
P&ID - Process and Instrument Diagram
PINTL – Production Interpretation
PIP - Pump Intake Pressure
PIP – Pipe in Pipe
PIT - Pump Intake Temperature
PJSM- Per Job Safety Meeting
PL – Production Licence
PLEM – Pipeline End Manifold
PLES -Pipeline End Structure
PLET – Pipeline End Termination
PLG – Plug Log
PLR – Pig Launcher/Receiver
PLS – Position Location System
PLSV - Pipelay Support Vessel
PLT – Production Logging Tool
PLTQ – Production Logging Tool Quicklook Log
PLTRE – Production Logging Tool Report
PLQ - Permanent Living Quarters
PMI – Positive Material Identification
PMOC - Project Management of Change
PMR - Precool Mixed Refrigerant
PMV -Production Master Valve
PNP - Proved Not Producing
POB – Personnel on Board
POBM – Pseudo-Oil-Based Mud
POD - Plan of Development
POF – Permanent Operations Facility
POOH / POH – Pull Out Of Hole
PON – Petroleum Operations Notice (United Kingdom)
POP - Pump Out Plug
POR – Density Porosity Log
POSFR – Post Fracture Report
POSTW – Post Well Appraisal Report
POSWE – Post Well Summary Report
PP – DXC Pressure Plot Log
PP – Pump Pressure
ppb - Pounds Per Barrel
PPC - Powered Positioning Caliper (Schlumberger dual-axis wireline caliper tool) [12]
ppcf – Pounds Per Cubic Foot
PPE – Preferred Pressure End
PPE - Personal Protective Equipment
PPFG - Pore Pressure/Fracture Gradient
ppg – Pounds Per Gallon
PPI – Post Production Inspection/Intervention
PPI – Post Pipelay Installation
pptf – Pounds (per square inch) Per Thousand Feet (of depth) – a unit of fluid density/pressure
PPS – Production Packer Setting
PQR - Procedure Qualification Record
PR2 – Testing regime to API6A Annex F
PRA – Production Reporting & Allocation
PREC – Perforation Record
PRESS – Pressure Report
PRL - Polished Rod Liner
PROD – Production Log
PROTE – Production Test Report
PROX – Proximity Log
PRSRE – Pressure Gauge Report
PSANA – Pressure Analysis
PSA – Production Service Agreement
PSA – Production Sharing Agreement
PSC – Production Sharing Contract
PSD – Planned Shut-Down
PSD - Pressure Safety Device
PSIA – Pounds Per Square Inch Atmospheric
PSIG – Pounds Per Square Inch Gauge
PSL – Product Specification Level
PSLOG – Pressure Log
PSM - Process Safety Management
PSP – Pseudostatic Spontaneous Potential
PSP - Positive Sealing Plug
PSPL – PSP Leak Detection Log
PSSR - Pre-Startup Safety Review
PSQ – Plug Squeeze Log
PST – PST Log
PSV – Pipe/Platform Supply Vessel
PSV – Pressure Safety Valve
PSVAL – Pressure Evaluation Log
PTA/S – Pipeline Termination Assembly/Structure
PTO - Permit to Operate
PTRO - Test rack opening pressure (For a gas lift valve)
PTSET – Production Test Setter
PTTC – Petroleum Technology Transfer Council, United States
PTW – Permit to Work
PU – Pick Up (tubing, rods, power swivel, etc.)
PUD – Proved Undeveloped Reserves
PUN – Puncher Log
PUR – Plant Upset Report
PUWER – Provision and Use of Work Equipment Regulations
PV – Plastic Viscosity
PVDF - Polyvinylidene Fluoride
PVSV - Pressure Vacuum Safety Valve
PVT – Pressure Volume Temperature
PVTRE – Pressure Volume Temperature Report
PW – Produced Water
PWD - Pressure While Drilling. (See also Annular- APWD.)
PWB – Production Wing Block (XT)
PWHT – Post Weld Heat Treat
PWRI – Produced Water Re-Injection
PWV – Production Wing Valve (also known as a flow wing valve on a Xmas tree)

text: Q[edit]

text:
QC – Quality control
QCR – Quality Control Report
QL – Quicklook Log

text: R[edit]

text:
R/B- RACK BACK
R&M - Repair and Maintenance
RAC – Ratio Curves
RACI – Responsible / Accountable / Consulted / Informed
RAT - Riser Assembly Tower
RAM – Reliability, Availability, and Maintainability
RAWS – Raw Stacks VSP Log
RBP – Retrievable Bridge Plug
RBS - Riser Base Spool
RCA – Root Cause Analysis
RCKST – Rig Checkshot
RCD – Rotating Control Device
RCI – Reservoir Characterization Instrument (for downhole fluid measurements e.g. spectrometry, density, etc.) [13]
RCL – Retainer Correlation Log
RCM – Reliability Centred Maintenance
RCR – Remote Component Replacement (Tool)
RCU – Remote Control Unit
RDMO - Rig Down Move Out
RDRT - Rig Down Rotary Tools
RDVI - Remote Digital Video Inspection
RDWL - Rig Down Wireline
RE – Reservoir Engineer
REOR – Reorientation Log
RE-PE – Re-Perforation Report
RESAN – Reservoir Analysis
RESDV - Riser Emergency Shut Down Valve
RESEV – Reservoir Evaluation
RESFL – Reservoir Fluid
RESI – Resistivity Log
RESL – Reservoir Log
RESOI – Residual Oil
REZ – Renewable Energy Zone (United Kingdom)
RF – Recovery Factor
RFCC - Ready for Commissioning Certificate
RFLNG – Ready for Liquefied Natural Gas
RFMTS – Repeat Formation Tester
RFO – Ready for operations (pipelines/cables)
RFSU – Ready For Start-Up
RFT – Repeat Formation Tester
RFTRE – Repeat Formation Tester Report
RFTS – Repeat Formation Tester Sample
RHA - Riser Heel Anchor
RHD - Rectangular Heavy Duty - usually screens used for shaking.
RIGMO – Rig Move
RIH – Run In Hole
RIMS – Riser Integrity Monitoring System
RITT – Riser Insertion Tube (Tool)
RKB – Rotary Kelly Bushing (a datum for measuring depth in an oil well)
RLOF – Rock Load-out Facility
RMLC – Request for Mineral Land Clearance
RMP – Reservoir Management Plan
RMS – Ratcheting Mule Shoe
RMS – Riser Monitoring System
RNT – RNT Log
ROCT – Rotary Coring Tool
ROP – Rate of Penetration
ROP - Rate of Perforation
ROT – Remote Operated Tool
ROV/WROV – Remotely Operated Vehicle/WorkClass Remotely Operated Vehicle, used for subsea construction and maintenance
ROZ – Recoverable Oil Zone
ROWS – Remote Operator Workstation
RPCM – Ring Pair Corrosion Monitoring
RPM – Revolutions Per Minute, (Rotations Per Minute)
RRC - Rail Road Commission (governs oil and gas production in Texas)
RROCK – Routine Rock Properties Report
RSES – Resonsible for Safety and Environment on Site
RSPP - a publicly traded, oil and gas producer focused on horizontal drilling of multiple stacked pay zones in the oil-rich Permian Basin
RSS – Rig Site Survey
RSS – Rotary Steerable Systems
RST – Reservoir Saturation Tool (Schlumberger) Log
RTMS – Riser Tension Monitoring System
RTE - Rotary Table Elevation
RTP - Return to production
RTTS – Retrievable Test-Treat-Squeeze (packer)
RU - Rig Up
RURT - Rig Up Rotary Tools
RVI - Remote Video Inspection
RWD – Reaming While Drilling

text: S[edit]

text:
SABA – Supplied Air Breathing Apparatus
SAGD – Steam Assisted Gravity Drainage
SALM – Single Anchor Loading Mooring
SAM – Subsea Accumulator Module
SAML – Sample Log
SAMTK – Sample Taker Log
SANDA – Sandstone Analysis Log
SAPP – sodium acid pyrophosphate
SAS - Safety and Automation System
SAT – SAT Log
SAT – Site Acceptance Test
SB – SIT-BO Log
SBF – Synthetic Base Fluid
SBM – Synthetic Base Mud
SBT – Segmented Bond Tool
SC – Seismic Calibration
SCADA – Supervisory Control and Data Acquisition
SCAL – Special core analysis
SCAP – Scallops Log
SCBA – Self-Contained Breathing Apparatus
SCC - System Completion Certificate
SCDES – Sidewall Core Description
SCF – standard cubic feet (of natural gas)
SCHLL – Schlumberger Log also SCHLO, SCHLU
SCM(MB) – Subsea Control Module (Mounting Base)
SCO – Synthetic crude oil
SCRS – Slow Circulation Rates
SCSG – type of pump
SCSSV – Surface Controlled Subsurface Safety Valve
SDON - Shut Down Over Night
SPCU - Subsea Control Unit
SCVF-Surface Casing Vent Flow. It's kind of test
SD – Sonic Density
SDFD – Shut Down For Day
SDFN – Shut Down For Night
SDIC – Sonic Dual Induction
SDL – Supplier Document List
SDM/U – Subsea Distribution Module/Unit
SDPBH – SDP Bottom Hole Pressure Report
SDSS - Super Duplex Stainless Steel
SDT – Step Draw-down Test (sometimes SDDT)
SDU/M – Subsea Distribution Unit/Module
SEA – Strategic Environmental Assessment (United Kingdom)
SECGU – Section Gauge Log
SEDHI – Sedimentary History
SEDIM – Sedimentology
SEDL – Sedimentology Log
SEDRE – Sedimentology Report
SEM – Subsea Electronics Module
Semi (or Semi-Sub) – Semi-Submersible Drilling Rig
SEPAR – Separator Sampling Report
SEQSU – Sequential Survey
SFERAE – Global Association for the use of knowledge on Fractured Rock in a state of Stress, in the field of Energy, Culture and Environment[12]
SFL – Steel Flying Lead
SG – Static Gradient, Specific Gravity
SGR - Shale Gouge Ratio
SGS – Steel Gravity Structure
SGSI – Shell Global Solutions International
SGUN – Squeeze Gun
SHA – Sensor Harness Assembly
SHC - System Handover Certificate
SHDT – Stratigraphic High Resolution Dipmeter Tool
SHO – Stab and Hinge Over
SHOCK – Shock Log
SHOWL – Show Log
SI – Shut In well
SI - Structural Integrity
SI - Scale Inhibitor
SI/TA – Shut In/Temporarily Abandoned
SIA - Social Impact Assessment
SIC - Subsea installation Contractor
SICP – Shut-In Casing Pressure
SIDPP – Shut-In Drill Pipe Pressure
SIDSM – Sidewall Sample
SIGTTO – Society of International Gas Tanker and Terminal Operators
SIMCON – Simultaneous Construction
SIMOPS – Simultaneous Operations
SIP – Shut In Pressure
SIPES – Society of Independent Professional Earth Scientists, United States
SIS - Safety Instrumented System
SIT – System Integration Test FR SIT – Field Representation SIT
SIT - (Casing) Shoe Integrity Test
SITHP – Shut In Tubing Hanger/Head Pressure (another term for CITHP)
SITT – Single TT Log
SIWHP – Shut-in Well Head Pressure
SKPLT – Stick Plot Log
SL – Seismic Lines
SLS – SLS GR Log
SLT – SLT GR Log
SM or S/M - Safety Meeting
SMA – Small Amount
SMLS – Seamless PipeMPP:
SMO – Suction Module
SMPC- Subsea Multiphase Pump: Pump, which can increase flowrate and pressure of the untreated wellstream
SN – Seat Nipple
SNAM – Societá NAzionale Metanodotti now Snam S.p.A. (Italy)[13]
SNP – Sidewall Neutron Porosity
SNS – Southern North Sea
SOBM – Synthetic Oil Based Mud
SOLAS – Safety of Life at Sea
SONCB – Sonic Calibration Log
SONRE – Sonic Calibration Report
SONWR – Sonic Waveform Report
SONWV – Sonic Waveform Log
SOP - Shear Out Plug
SOW _ Slip-On Wellhead
SP - Set Point
SP – Shot point (geophysics)
SP – Spontaneous Potential (Well Log)
SPAMM - Subsea Pressurization and Monitoring Manifold
SPCAN – Special core analysis
SPCU - Subsea Power and Control Unit
SPE – Society of Petroleum Engineers[14]
SPEAN – Spectral Analysis
SPEL – Spectralog
SPFM – Single Phase Flow Meter
SPH – SPH Log
SPHL - Self Propelled Hyperbaric Lifeboats
SPM – Side Pocket Mandrel or Strokes Per Minute (of a positive-displacement pump)
SPMT – Self-Propelled Modular Transporter
SPOP – Spontaneous Potential Log
SPP – Stand Pipe Pressure
SPROF – Seismic Profile
SPS – Subsea Production Systems
SPT – Shallower Pool Test, Lahee classification
SPWLA - Society of Petrophysicists and Well Log Analysts[15]
SQL – Seismic Quicklook Log
SQZ - Squeeze job
SR – Shear Rate
SRD – Seismic Reference Datum, an imaginary horizontal surface at which TWT is assumed to be zero
SREC – Seismic Record Log
SRT – Site Receival Test
SS – Subsea, as in a datum of depth, e.g. TVDSS (True Vertical Depth Subsea)
SSCC – Sulphide Stress Corrosion Cracking
SSCP -Subsea Cryogenic Pipeline
SSCS – Subsea Control System
SSD – Sub Sea Level depth (in Metres or Feet, positive value in downwards direction with respect to the Geoid)
SSD – Sliding Sleeve Door
SSFP - Subsea Flowline & Pipeline
SSG – Sidewall Sample Gun
SSIV – Subsea Isolation Valve
SSTV - Subsea Test Valve
SSM – Subsea Manifolds
SSMAR – Synthetic Seismic Marine Log
SSPLR – Subsea Pig Launcher/Receiver
SSSL – Supplementary Seismic Survey Licence (United Kingdom), a type of onshore licence
SSSV – Sub-Surface Safety Valve
SSTT – Subsea Test Tree
SSU – Subsea Umbilicals
SSV – Surface Safety Valve
SSWI – Subsea Well Intervention
STAB – Stabiliser
STAGR – Static Gradient Survey Report
STB – stock tank barrel
STC – STC Log
STD - 2-3 joints of tubing
STFL – Steel Tube Fly Lead
STG - Steam Turbine Generator (not to be confused with a GTG)
STGL – Stratigraphic Log
STIMU – Stimulation Report
STKPT – Stuck Point
STL – STL Gamma Ray Log
STL - Submerged Turret Loading
STRAT – Stratigraphy, stratigraphic
STRRE – Stratigraphy Report
STOIIP – Stock Tank Oil Initially In Place
STOP – Safety Training Observation Program
STP - Submerged Turret Production
STSH – String Shot
STTR – Single Top Tension Riser
ST&C - Short Thread and Coupled
STC - Short Thread and Coupled
STU - Steel Tube Umbilical
SUML – Summarised Log
SUMRE – Summary Report
SUMST – Geological Summary Sheet
SURF – Subsea/Umbilicals/Risers/Flowlines
SURFR – Surface Sampling Report
SURRE – Survey Report
SURU - Start-up Ramp-up
SURVL – Survey Chart Log
SUT(A/B) – Subsea Umbilical Termination (Assembly/Box)
SUTU – Subsea Umbilical Termination Unit
SW – Salt Water
SWC - Side Wall Core
SWD – Salt Water Disposal Well
SWE – Senior Well Engineer
SWHE – Spiral Wound Heat Exchanger
SWOT – Strengths, Weaknesses, Opportunities and Threats
SWT - Surface Well Testing
SV – Sleeve Valve or Standing Valve
SVLN - Safety Valve Landing Nipple
SWLP - seawater lift pump
SYNRE – Synthetic Seismic Report
SYSEI – Synthetic Seismogram Log

text: T[edit]

text:
T – well flowing to Tank
TA – Temporarily Abandoned well
TA – Top Assembly
TAC – Tubing Anchor
TAGOGR – Thermally Assisted Gas/Oil Gravity Drainage
TAN - Total Acid Number
TAPLI – Tape Listing
TAPVE – Tape Verification
TAR – True Amplitude Recovery
TB – Tubing Puncher Log
TBE – Technical Bid Evaluation
TBG - Tubing
TBT – Through Bore Tree / Toolbox Talk
TCA – Total Corrosion Allowance
TCC- Tungsten Carbide Coating
TCCC - Transfer of Care, Custody and Control
TCF – Temporary Construction Facilities
TCF – Trillion Cubic Feet(of gas)
TCI – Tungsten Carbide Insert (a type of rollercone drillbit)
TCP - Tubing Conveyed Perforating (Gun)
TCPD – Tubing-Conveyed Perforating Depth
TCU- Thermal Combustion Unit
TD – Target Depth
TD – Total Depth (depth of the end of the well; also a verb, to reach the final depth, used as an acronym in this case)
TDD – Total Depth (Driller)
TDC - Total Drilling Cost
TDL – Total Depth (Logger)
TDM – Touch Down Monitoring
TDP - Touch Down Point
TDS – Top Drive System
TDS – Total Dissolved Solids
TDT – Thermal Decay Time Log
TDTCP – TDT CPI Log
TDT GR – TDT Gamma Ray Casing Collar Locator Log
TEFC – Totally Enclosed Fan Cooled
TEG – Tri-Ethylene Glycol
TEG - Thermal Electric Generator
TELER – Teledrift Report
TEMP- Temperature Log
TFE – TotalFinaElf (obsolete; Now Total S.A.) major French multinational oil company[16]
TFL – Through Flow Line
TFM – TaskForceMajella Research Project
TGB – Temporary Guide Base
TGT / TG - Tank Gross Test
TGOR – Total Gas Oil Ratio (GOR uncorrected for gas lift gas present in the production fluid)
TH – Tubing Hanger
THD – Tubing Head
THERM – Thermometer Log
THP – Tubing Hanger Pressure (pressure in the production tubing as measured at the tubing hanger)
THRT – Tubing Hanger Running Tool
THS - Tubing Head Spool
TIE – Tie In Log
TIH – Trip Into Hole
TIW – Texas Iron Works (pressure valve)
TIEBK – Tieback Report
TLI – Top of Logging Interval
TLOG – Technical Log
TLP - Tension-leg platform
TMCM – Transverse Mercator Central Meridian
TMD – Total Measured Depth in a wellbore
TNDT – Thermal Neutron Decay Time
TNDTG – Thermal Neutron Decay Time/Gamma Ray Log
TOC – Top Of Cement
TOC – Total Organic Content/Carbon
TOF - Top of Fish
TOFD – Time of first data sample (on seismic trace)
TOFS – Time of first surface sample (on seismic trace)
TOH – Trip Out of Hole
TOOH – Trip Out Of Hole
TOL – Top Of Liner
TORAN – Torque and Drag Analysis
TPC - Temporary Plant Configuration
TPERF – Tool Performance
TQM – Total Quality Management
TRCFR – Total Recordable Case Frequency Rate
TRT – Tree Running Tool
TR – Temporary Refuge
TRA – Top Riser Assembly
TRA – Tracer Log
TRACL – Tractor Log
TRD – Total Report Data
TREAT – Treatment Report
TREP – Test Report
TRIP – Trip Condition Log
TRS - Tubing Running Services
TRSV – Tubing Retrievable Safety Valve
TRSCSSV – Tubing Retrievable Surface Controlled Sub-Surface Valve
TRSCSSSV – Tubing Retrievable Surface Controlled Sub-Surface Safety Valve
TSA – Thermally Sprayed Aluminium
TSI – Temporarily Shut In
TSS - Total Suspended Solids
TSOV - Tight shut off valve
TT – Torque Tool
TT – Transit Time Log
TTVBP - Through Tubing Vented Bridge Plug
TTRD – Through Tubing Rotary Drilling
TUC - Topside Umbilical Connection
TUC - Turret Utility Container
TUM – Tracked Umbilical Machine
TUPA – Topside Umbilical Panel Assembly
TUTB – Topside Umbilical Termination Box/Unit/Assembly (TUTU)
TVBDF – True Vertical Depth Below Derrick Floor
TV/BIP – Ratio of Total Volume (ore and overburden) to Bitumen In Place
TVD – True Vertical Depth
TVDPB – True Vertical Depth Playback Log
TVDSS – True Vertical Depth Sub Sea
TVELD – Time and Velocity to Depth
TVRF – True Vertical Depth versus Repeat Formation Tester
TWT – Two-Way Time (seismic)
TWTTL – Two-Way Travel Time Log

text: U[edit]

text:
UBHO - Universal Bottom Hole Orientation (sub)
UBI – Ultrasonic Borehole Imager
UBIRE – Ultrasonic Borehole Imager Report
UCH - Umbilical Connection Housing
UCR - Unsafe Condition Report
UCSU – Upstream Commissioning and Start-Up
UFJ – Upper Flex Joint
UFR – Umbilical Flow lines & Risers
UGF – Universal Guide Frame
UIC – Underground Injection Control
UKCS – United Kingdom Continental Shelf
UKOOA – United Kingdom Offshore Operators Association
UKOOG – United Kingdom Onshore Operators Group
ULCGR – Uncompressed LDC CNL Gamma Ray Log
UMCA – Umbilical Midline Connection Assembly
UMV – Upper Master Valve (from a Xmas tree)
UPB - Unmanned Production Buoy
UPL - Upper pressure limit
UPR – Upper Pipe Ram
UPT - Upper pressure threshold
URA – Upper Riser Assembly
URT – Universal Running Tool
USBL - Ultra-short-baseline systems
USIT - Ultrasonic imaging tool (cement bond logging) [14]
USGS – United States Geological Survey
UTA/B – Umbilical Termination Assembly/Box
UTAJ - Umbilical Termination Assembly Jumper
UTM – Universal Transverse Mercator
UWI – Unique Well Identifier
UWILD – Underwater Inspection in Lieu of Dry Docking

text: V[edit]

text:
VDENL – Variation Density Log
VDL – VDL Log (Variable Density Log)
VDU – Vacuum Distillation Unit, used in processing bitumen
VELL – Velocity Log
VERAN – Verticality Analysis
VERIF – Verification List
VERLI – Verification Listing
VERTK – Vertical Thickness
VFC - Volt Free Contact
VIR – Value Investment Ratio
VISME – Viscosity Measurement
VIV – Vortex induced Vibration
VLP – Vertical Lift Performance
VLS - Vertical Lay System
VLTCS – Very Low Temperature Carbon Steel
VO – Variation Order
VOCs – Volatile Organic Compounds
VOR – Variation Order Request
VRS- Vapor Recovery System
VRR – Voidage Replacement Ratio
VS – Vertical Section
VSD – Variable Speed Drive
VSI - Versatile Seismic Imager (Schlumberger VSP tool)[17]
VSP – Vertical Seismic Profile
VSPRO – Vertical Seismic Profile
VTDLL – Vertical Thickness Dual Laterolog
VTFDC – Vertical Thickness FDC CNL Log
VTISF – Vertical Thickness ISF Log
VWL – Velocity Well Log
VXT – Vertical Christmas Tree

text: W[edit]

text:
W – Watt
W/C – Water Cushion
WCC - Work Control Certificate
WABAN – Well Abandonment Report
WAC - Weak Acid Cation
WAG – Water Alternating Gas (describes an injection well which alternates between water and gas injection)
WALKS – Walkaway Seismic Profile
WAS - Well Access System
WATAN – Water Analysis
WAV3 – Amplitude (in Seismics)
WAV4 – Two Way Travel Time (in Seismics)
WAV5 – Compensate Amplitudes
WAVF – Waveform Log
WBM – Water-Based drilling Mud
WBS - Well Bore Schematic
WBS - Work Breakdown Structure
WC – Watercut / Wildcat well
WCT - Wet Christmas Tree
WE – Well Engineer
WEG – Wireline Entry Guide
WELDA – Well Data Report
WELP – Well Log Plot
WEQL – Well Equipment Layout
WESTR – Well Status Record
WESUR – Well Summary Report
WF – Water Flooding
WGFM - Wet Gas Flow Meter

text:
WFAC – Waveform Acoustic Log
WGEO – Well Geophone Report
WGR - Water Gas Ratio
WGFM – Wet Gas Flow Meter
WGUNT – Water Gun Test
Wh – White
WH – Well History
WHIG – Whitehouse Gauge
WHM – Wellhead Maintenance
WHP – Wellhead Pressure
WHSIP - Wellhead Shut-In Pressure
WI – Water Injection
WI – Working Interest
WIKA - Definition Needed
WIR - Water Intake Risers
WIT- Water Investigation Tool
WITS – Well Site Information Transfer System
WIPSP – WIP Stock Packer
WLC – Wireline Composite Log
WLL – Wireline Logging
WLSUM – Well Summary
WLTS Well Log Tracking System
WLTS – Well Log Transaction System
WM - Wet Mate
WHM – Wellhead Maintenance
WHMIS – WorkPlace Hazardous Material Information Systems
WHP – Wellhead Pressure
WO – Well in Work Over
WO/O – Waiting on Orders
WOA – Well Operations Authorization
WOB – Weight On Bit
WOC – Wait on Cement
WOC – Water Oil Contact (or Oil Water Contact)
WOE – Well Operations Engineer (a key person of Well services)
WOM – Wait(ing) on Material
WOR – Water-Oil Ratio
WORKO – Workover
WOS – West of Shetland, oil province on the UKCS
WOW – Wait(ing) On Weather
WP – Well Proposal or Working Pressure
WPC – Water Pollution Control
WPLAN – Well Course Plan
WPQ/S/T – Weld Procedure Qualification/Specification/Test
WPR – Well Prognosis Report
WQ – A textural parameter used for CBVWE computations (Halliburton)
WQCA – Water Quality Control Act
WQCB – Water Quality Control Board
WR – Wireline Retrievable (as in a WR Plug)
WR – Wet Resistivity
WRS – Well Report Sepia
WRSCSSV – Wireline Retrievable Surface Controlled Sub-Surface Valve
WSCL – Well Site Core Log
WSE – Well Seismic Edit
WSERE – Well Seismic Edit Report
WSHT – Well Shoot
WSL – Well Site Log
WSO – Water Shut Off
WSOG – Well Specific Operation Guidelines
WSP – Well Seismic Profile
WSR – Well Shoot Report
WSS – Well Services Supervisor (leader of Well services at the wellsite)
WSS – Working Spread Sheet (for logging)
WSSAM – Well Site Sample
WSSOF – WSS Offset Profile
WSSUR – Well Seismic Survey Plot
WSSVP – WSS VSP Raw Shots
WSSVS – WSS VSP Stacks
WST - Well Seismic Tool (checkshot)
WSTL – Well Site Test Log
WSU – Well Service Unit
wt - wall thickness
WT – Well Test
WTI – West Texas Intermediate benchmark crude
WUT – Water Up To
WVS – Well Velocity Survey

text: X[edit]

text:
XC – Cross-connection, cross correlation
XL – or EXL, Exploration Licence (United Kingdom), a type of onshore licence issued between the First Onshore Licensing Round (1986) and the Sixth (1992)
Xln – Crystalline (minerals)
XLPE -Cross-linked Polyethylene
XMAC – Cross-Multipole Array Acoustic log
XMAC-E – XMAC Elite (Next generation of XMAC)
XMRI – Extended Range Micro Imager (Halliburton)
XMT/XT/HXT – XMas Tree (Christmas Tree, the valve assembly on a production well-head)
XO – Cross-Over
XOM – Exxon Mobil
XOV – Cross-Over Valve
XPERM – Matrix Permeability in the X-Direction
XPHLOC – Crossplot Selection for XPHI
XPOR – Crossplot Porosity
XPT – Formation Pressure Test log (Schlumberger)
XV - On/Off Valve (Process Control)
XYC – XY Calliper Log (Halliburton)

text: Y[edit]

text:
yd – yard
yl – Holdup Factor
YP – Yield Point
yr – year

text: Z[edit]

text:
Z – depth, in the geosciences referring to the depth dimension in any x, y, z data
ZDENP – Density Log
ZDL – Compensated Z-Densilog
ZLD - Zero Liquid Discharge
ZOI – Zone of Influence

text: Zug Put abbreviations that you do not know in this section. Other people might have an idea. If you received an answer, delete the abbreviation from this section, and add it to its alphabetical section (If it is not there yet).

text:
BOL
CK - Context: Notes on drilling logs
OOA – Context: OOA Group
MDT- Modular Dynamic Tester <Schlumberger>
RDT - Reservoir Description Tool <Halliburton>
SPM - Context: Notes on drilling logs
SPR - Context: Notes on drilling logs
SPUD
SPV
THF
URB
WWS


document_title: Polychaete

question_text: where might new segments be added during growth in a polychaete worm

root

text: Polychaete

text: Description[edit]

text: Polychaetes are segmented worms, generally less than 10 cm (4 in) in length, although ranging at the extremes from 1 mm (0.04 in) to 3 m (10 ft), in Eunice aphroditois. They can sometimes be brightly coloured, and may be iridescent or even luminescent. Each segment bears a pair of paddle-like and highly vascularized parapodia, which are used for movement and, in many species, act as the worm's primary respiratory surfaces. Bundles of bristles, called setae, project from the parapodia.[4]

tag: p

text: However, polychaetes vary widely from this generalised pattern, and can display a range of different body forms. The most generalised polychaetes are those that crawl along the bottom, but others have adapted to many different ecological niches, including burrowing, swimming, pelagic life, tube-dwelling or boring, commensalism, and parasitism, requiring various modifications to their body structures.

text: The head, or prostomium, is relatively well developed, compared with other annelids. It projects forward over the mouth, which therefore lies on the animal's underside. The head normally includes two to four pair of eyes, although some species are blind. These are typically fairly simple structures, capable of distinguishing only light and dark, although some species have large eyes with lenses that may be capable of more sophisticated vision.[4]

text: The head also includes a pair of antennae, tentacle-like palps, and a pair of pits lined with cilia, known as "nuchal organs". These latter appear to be chemoreceptors, and help the worm to seek out food.[4]

text: Internal anatomy and physiology[edit]

text: The outer surface of the body wall consists of a simple columnar epithelium covered by a thin cuticle. Underneath this, in order, are a thin layer of connective tissue, a layer of circular muscle, a layer of longitudinal muscle, and a peritoneum surrounding the body cavity. Additional oblique muscles move the parapodia. In most species the body cavity is divided into separate compartments by sheets of peritoneum between each segment, but in some species it's more continuous.

text: The mouth of polychaetes is located on the peristomium, the segment behind the prostomium, and varies in form depending on their diets, since the group includes predators, herbivores, filter feeders, scavengers, and parasites. In general, however, they possess a pair of jaws and a pharynx that can be rapidly everted, allowing the worms to grab food and pull it into their mouths. In some species, the pharynx is modified into a lengthy proboscis. The digestive tract is a simple tube, usually with a stomach part way along.

text: The smallest species, and those adapted to burrowing, lack gills, breathing only through their body surfaces. Most other species have external gills, often associated with the parapodia.

text: A simple but well-developed circulatory system is usually present. The two main blood vessels furnish smaller vessels to supply the parapodia and the gut. Blood flows forward in the dorsal vessel, above the gut, and returns down the body in the ventral vessel, beneath the gut. The blood vessels themselves are contractile, helping to push the blood along, so most species have no need of a heart. In a few cases, however, muscular pumps analogous to a heart are found in various parts of the system. Conversely, some species have little or no circulatory system at all, transporting oxygen in the coelomic fluid that fills their body cavities.[4]

text: The blood may be colourless, or have any of three different respiratory pigments. The most common of these is haemoglobin, but some groups have haemerythrin or the green-coloured chlorocruorin, instead.

text: The nervous system consists of a single or double ventral nerve cord running the length of the body, with ganglia and a series of small nerves in each segment. The brain is relatively large, compared with that of other annelids, and lies in the upper part of the head. An endocrine gland is attached to the ventral posterior surface of the brain, and appears to be involved in reproductive activity. In addition to the sensory organs on the head, photosensitive eye spots, statocysts, and numerous additional sensory nerve endings, most likely in involved with the sense of touch, also occur on the body.[4]

text: Polychaetes have a varying number of protonephridia or metanephridia for excreting waste, which in some cases can be relatively complex in structure. The body also contains greenish "chloragogen" tissue, similar to that found in oligochaetes, which appears to function in metabolism, in a similar fashion to that of the vertebrate liver.[4]

text: The cuticle is constructed from cross-linked fibres of collagen and may be 200 nm to 13 mm thick. Their jaws are formed from sclerotised collagen, and their setae from sclerotised chitin.[5]

text: Ecology[edit]

text: Polychaetes are extremely variable in both form and lifestyle, and include a few taxa that swim among the plankton or above the abyssal plain. Most burrow or build tubes in the sediment, and some live as commensals.  A few are parasitic.  The mobile forms (Errantia) tend to have well-developed sense organs and jaws, while the stationary forms (Sedentaria) lack them, but may have specialized gills or tentacles used for respiration and deposit or filter feeding, e.g., fanworms.

text: Underwater polychaetes have eversible mouthparts used to capture prey.[6] A few groups have evolved to live in terrestrial environments, like Namanereidinae with many terrestrial species, but are restricted to humid areas. Some have even evolved cutaneous invaginations for aerial gas exchange.

text:
One notable polychaete, the Pompeii worm (Alvinella pompejana) is endemic to the hydrothermal vents of the Pacific Ocean. Pompeii worms are among the most heat-tolerant complex animals known.
A recently discovered genus, Osedax, includes a species nicknamed the "bone-eating snot flower".[7]
Another remarkable polychaete is Hesiocaeca methanicola, which lives on methane clathrate deposits.
Lamellibrachia luymesi is a cold seep tube worm that reaches lengths of over 3 m and may be the most long-lived animal, being over 250 years old.
A still unclassified multilegged predatory polychaete worm was identified only by observation from the underwater vehicle Nereus at the bottom of the Challenger Deep, the greatest depth in the oceans, near 10,902 m (35,768 ft) in depth. It was about an inch long visually, but the probe failed to capture it, so it could not be studied in detail.[8]
The Bobbit worm (Eunice aphroditois) is a predatory species that can achieve a length at 3 m (9.8 feet), with an average diameter of 25 mm (0.98 in).

tag: ul

text: Reproduction[edit]

text: Most polychaetes have separate sexes, rather than being hermaphroditic. The most primitive species have a pair of gonads in every segment, but most species exhibit some degree of specialisation. The gonads shed immature gametes directly into the body cavity, where they complete their development. Once mature, the gametes are shed into the surrounding water through ducts or openings that vary between species, or in some cases by the complete rupture of the body wall (and subsequent death of the adult). A few species copulate, but most fertilize their eggs externally.

text: The fertilized eggs typically hatch into trochophore larvae, which float among the plankton, and eventually metamorphose into the adult form by adding segments. A few species have no larval form, with the egg hatching into a form resembling the adult, and in many that do have larvae, the trochophore never feeds, surviving off the yolk that remains from the egg.[4]

text: Some polychaetes exhibit remarkable reproductive strategies. Some species in the genus Eunicie reproduce by epitoky. For much of the year, these worms look like any other burrow-dwelling polychaete, but as the breeding season approaches, the worm undergoes a remarkable transformation as new, specialized segments begin to grow from its rear end until the worm can be clearly divided into two halves. The front half, the atoke, is asexual. The new rear half, responsible for breeding, is known as the epitoke. Each of the epitoke segments is packed with eggs and sperm and features a single eyespot on its surface. The beginning of the last lunar quarter is the cue for these animals to breed, and the epitokes break free from the atokes and float to the surface. The eye spots sense when the epitoke reaches the surface and the segments from millions of worms burst, releasing their eggs and sperm into the water.[9]

text: Another strange strategy is employed by the deep sea worm Syllis ramosa which lives inside a sponge. The rear end of the worm develops into a "stolon" containing the eggs or sperm, and this stolon becomes detached from the parent worm, and rises to the sea surface where fertilisation takes place.[10]

text: Fossil record[edit]

text: Stem-group polychaete fossils are known from the Sirius Passet Lagerstätte, a rich, sedimentary deposit in Greenland tentatively dated to the late Atdabanian (early Cambrian).[11] Many of the more famous Burgess Shale organisms, such as Canadia, may also have polychaete affinities. Wiwaxia, long interpreted as an annelid,[12] is now considered to represent a mollusc.[13][14] An even older fossil, Cloudina, dates to the terminal Ediacaran period; this has been interpreted as an early polychaete, although consensus is absent.[15][16]

text: Being soft-bodied organisms, the fossil record of polychaetes is dominated by their fossilized jaws, known as scolecodonts, and the mineralized tubes that some of them secrete.[17] Most important biomineralising polychaetes are serpulids, sabellids, and cirratulids. Polychaete cuticle does have some preservation potential; it tends to survive for at least 30 days after a polychaete's death.[5] Although biomineralisation is usually necessary to preserve soft tissue after this time, the presence of polychaete muscle in the nonmineralised Burgess shale shows this need not always be the case.[5] Their preservation potential is similar to that of jellyfish.[5]

text: Taxonomy and systematics[edit]

text: Taxonomically, polychaetes are thought to be paraphyletic,[18] meaning the group excludes some descendants of its most recent common ancestor.  Groups that may be descended from the polychaetes include the oligochaetes (earthworms and leeches), sipunculans, and echiurans.  The Pogonophora and Vestimentifera were once considered separate phyla, but are now classified in the polychaete family Siboglinidae.

text: Much of the classification below matches Rouse & Fauchald, 1998, although that paper does not apply ranks above family.

text: Older classifications recognize many more (sub)orders than the layout presented here. As comparatively few polychaete taxa have been subject to cladistic analysis, some groups which are usually considered invalid today may eventually be reinstated.

text: These divisions were shown to be mostly paraphyletic in recent years.

text:
Basal or incertae sedis
Family Diurodrilidae
Family Histriobdellidae
Family Nerillidae
Family Parergodrilidae
Family Potamodrilidae
Family Psammodrilidae
Family Spintheridae
Family Protodriloididae
Family Saccocirridae
Order Haplodrili
Order Myzostomida
Family Endomyzostomatidae
Family Asteromyzostomatidae
Family Myzostomidae
Subclass Palpata
Family Protodrilidae
Family Polygordiidae
Subclass Aciculata
Family Levidoridae
Order Amphinomida
Family Amphinomidae
Family Euphrosinidae
Order Eunicida
Family Dorvilleidae
Family Eunicidae
Family Hartmaniellidae
Family Ichthyotomidae
Family Lumbrineridae
Family Oenonidae
Family Onuphidae
Order Phyllodocida
Suborder Aphroditiformia
Family Acoetidae
Family Aphroditidae
Family Eulepethidae
Family Iphionidae
Family Pholoidae
Family Polynoidae
Family Sigalionidae
Suborder Glyceriformia
Family Glyceridae
Family Goniadidae
Family Lacydoniidae
Family Paralacydoniidae
Suborder Nereidiformia
Family Antonbruunidae
Family Chrysopetalidae
Family Hesionidae
Family Nereididae
Family Pilargidae
Family Syllidae
Suborder Phyllodocida incertae sedis
Family Iospilidae
Family Nautiliniellidae
Family Nephtyidae
Family Typhloscolecidae
Family Tomopteridae
Suborder Phyllodociformia
Family Alciopidae
Family Lopadorhynchidae
Family Phyllodocidae
Family Pontodoridae
Subclass Sedentaria
Family Chaetopteridae
Infraclass Canalipalpata
Order Sabellida
Family Caobangidae
Family Fabriciidae
Family Oweniidae
Family Sabellariidae
Family Sabellidae
Family Serpulidae
Family Siboglinidae (formerly the phyla Pogonophora & Vestimentifera)
Order Spionida
Suborder Spioniformia
Family Apistobranchidae
Family Longosomatidae
Family Magelonidae
Family Poecilochaetidae
Family Spionidae
Family Trochochaetidae
Family Uncispionidae
Order Terebellida
Suborder Cirratuliformia
Family Acrocirridae (sometimes placed in Spionida)
Family Cirratulidae (sometimes placed in Spionida)
Family Ctenodrilidae (sometimes own suborder Ctenodrilida)
Family Fauveliopsidae (sometimes own suborder Fauveliopsida)
Family Flabelligeridae (sometimes suborder Flabelligerida)
Family Flotidae (sometimes included in Flabelligeridae)
Family Poeobiidae (sometimes own suborder Poeobiida or included in Flabelligerida)
Family Sternaspidae (sometimes own suborder Sternaspida)
Suborder Terebellomorpha
Family Alvinellidae
Family Ampharetidae
Family Pectinariidae
Family Terebellidae
Family Trichobranchidae
Infraclass Scolecida
Family Arenicolidae
Family Capitellidae
Family Cossunidae
Family Maldanidae
Family Opheliidae
Family Orbiniidae
Family Paraonidae
Family Scalibregmatidae
Order Capitellida (nomen dubium)
Order Cossurida (nomen dubium)
Order Opheliida (nomen dubium)
Order Orbiniida (nomen dubium)
Order Questida (nomen dubium)
Order Scolecidaformia (nomen dubium)