AAADE American Association of Drilling EngineersAAPG American Association of Petroleum GeologistsAAPL American Association of Professional LandmenAAODC American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC)AAV Annulus Access ValveABAN Abandonment, (also as AB)ABSA Alberta Boilers Safety AssociationACHE Air-Cooled Heat ExchangerACOU AcousticACQU Acquisition logADEP Awaiting Development with Exploration Potential, referring to an assetADROC advanced rock properties reportADT Applied Drilling Technology, ADT logAFE Authorization For Expenditure, a process of submitting a business proposal to investorsAFP Active Fire ProtectionAGRU acid gas removal unitAHBDF along hole (depth) below Derrick floorAHD along hole depthAIRG airgunAIRRE airgun reportAIT array induction toolAL appraisal license (United Kingdom), a type of onshore licence issued before 1996ALARP as low as reasonably practicableALC aertical seismic profile acoustic log calibration reportALR acoustic log reportaMDEA activated methyldiethanolamineAMS auxiliary measurement service log; Auxiliary Measurement Sonde (temperature)AMSL above mean sea levelAMI area of mutal interestAMV annulus master valveANACO analysis of core logs reportANARE analysis reportAOF absolute open flowAOFP absolute open-flow potentialAPD application for permit to drillAPI American Petroleum Institute: both the organisation and measure of oil weight (API gravity) in APIAPPRE appraisal reportAPS active pipe supportARACL array acoustic logARESV analysis of reservoirARI azimuthal resistivity imageARRC array acoustic reportART actuator running toolAS array sonic processing logASI ASI logASME American Society of Mechanical EngineersASP array sonic processing reportASTM American Society for Testing and MaterialsASCSSV annulus surface controlled sub-surface valveASV annular safety valveATD application to drillAUV - authonomus underwater vehicleAV annular velocity or apparent viscosityAVO amplitude versus offset (geophysics)AWB/V annulus wing block/valve (XT)AWO approval for well operationBB or b prefix denoting a number in billionsBA Bottom Assembly (of a riser)bbl barrelBBSM behaviour-based safety managementBCPD barrels condensate per dayBcf billion cubic feet (of natural gas)Bcfe billion cubic feet (of natural gas equivalent)BDF below Derrick floorBDL bit data logBGL borehole geometry logBGL below ground level (used as a datum for depths in a well)BGS British Geological SurveyBGT borehole geometry toolBGWP base of ground-water protectionBH bloodhoundBHA bottom hole assembly (toolstring on coiled tubing or drill pipe)BHC BHC gamma ray logBHCA BHC acoustic logBHCS BHC sonic logBHCT bottomhole circulating temperatureBHL borehole logBHP bottom hole pressureBHPRP borehole pressure reportBHSRE bottom hole sampling reportBHSS borehole seismic surveyBHT bottomhole temperatureBHTV borehole television reportBINXQ bond index quicklook logBIOR biostratigraphic range logBIORE biostratigraphy study reportBIVDL BI/DK/WF/Casing collar locator/gamma ray logBLI bottom of logging intervalBO back-off logboe barrel(s) of oil equivalentboed barrel(s) of oil equivalent per dayboepd barrel(s) of oil equivalent per dayBOB back on bottomBOD - Biological Oxygen DemandBOM Bill of materialsBOP Blowout preventerBOP bottom of pipebopd barrel(s) of oil per dayBOREH borehole seismic analysisBOSIET basic offshore safety induction and emergency trainingBOTHL bottom hole locator logBOTTO bottom hole pressure/temperature reportbpd barrels per dayBPH barrels per hourBPFL borehole profile logBPLUG baker plugBPV 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 logBRPLG bridge plug logBRT below rotary table (used as a datu