Oilfield Glossary
Oilfield Glossary
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a 1-D seismic data 3C seismic data 4C seismic data
m 2D seismic data 3D seismic data 4D seismic data
n 2D survey 3D survey 6FF40
1D seismic data 2-way traveltime


a acquisition log aluminum activation log aquifer
API Recommended Practice 10B Recommended Practice for Testing Well Cements acrylamide acrylate polymer aluminum stearate Archie equation
API Specification 10A – Specification for Cements and Materials for Well Cementing acrylamide polymer ambient temperature Archie rock
abandonment costs acrylamide-acrylate polymer amides area open to flow
abnormal events acrylamido methyl propane sulfonate polymer amines areal displacement efficiency
abnormal pressure acrylamido-methyl-propane sulfonate polymer amplitude areal sweep efficiency
abrasion test acrylate polymer amplitude anomaly arenaceous
abrasive jetting activation log amplitude distortion argillaceous
absolute age active margin amplitude variation with offset arithmetic mean
absolute filter active sulfide AMPS armor
absolute open flow potential activity of aqueous solutions anaerobic aromatic content test
absolute permeability acyclic compound analog aromatic hydrocarbon
absolute volume adapter spool anchor pin array
absorbing boundary conditions additivity angle of approach array induction
absorptance adhesion tension angle of incidence array laterolog
absorption adjacent bed angular dispersion array propagation resistivity
absorption band adjustable choke angular unconformity array sonic
absorption oil adjusted flow time anhydrite arrival time
abyss adsorbed gas aniline point test artificial intelligence
abyssal adsorption anion artificial lift
accelerator advective transport modeling anionic as delivered BTU
accelerator source aeolian anisotropic as-delivered BTU
accelerometer aeolotropy anisotropic formation ASME
accommodation aerated layer anisotropy ASP flooding
accretion aerobic annular blowout preventer asphalt
accumulation aeromagnetic survey annular BOP asphaltene precipitation
accumulator AFE annular flow asphaltenes
accuracy afterflow annular gas flow asphaltic mud additive
acetic acid AGC annular space assignment
acid AGC time constant annular velocity asthenosphere
acid effect agglomeration annulus ASTM
acid frac aggradation anode atmospheric corrosion
acid gas aggradational anomalous attapulgite
acid inhibitor aggregate anomaly attenuation
acid job aggregation anoxic attenuation resistivity
acid number air cut mud anticlinal attitude
acid stimulation air drill anticlinal trap attribute
acid tank air drilling anticline audio measurement
acid wash air gun antifoam aulacogen
acidity air shooting antifoam agent authority for expenditure
acidize air wave antisqueeze autochthon
acidizing air-cut mud antithetic fault autochthonous
acoustic Alford rotation antiwhirl bit autocorrelation
acoustic basement aliasing aperture automatic gain control
acoustic coupler alidade API autotrack
acoustic emission aliphatic compound API 6D: Specification for Pipeline Valves autotracking
acoustic impedance alkaline API fluid loss test AV
acoustic impedance section alkaline flooding API fluid-loss test average reservoir pressure
acoustic log alkaline-surfactant-polymer flooding API gravity average velocity
acoustic mode alkalinity API unit AVO
acoustic positioning alkalinity test apparent anisotropy axial loading
acoustic transducer allochthon apparent dip axial surface
acoustic transparency allochthonous apparent matrix axis of rotational symmetry
acoustic traveltime alluvial apparent velocity azimuth
acoustic velocity alluvium apparent viscosity azimuthal
acoustic velocity log all-welded construction apparent wavelength azimuthal density
acoustic wave alpha processing applied-potential method azimuthal laterolog
acquisition altered zone appraisal azimuthal resolution


back flow beam blind box Boyle's Law Double Cell
back in beam pump blind ram Boyle's Law Single Cell
back off bean choke blind shear ram brachistochrone
back pressure Bearden units of consistency blind zone braided line
back pressure valve Beaufort scale blind-shear ram brake
back stripping bed block break
back up bed thickness block valve break circulation
back up ring bed wrap blockage break out
back wash bel block-and-bleed breakdown pressure
backflow bell nipple blow down breaker
background gas belt effect blow out breakout
back-in benchmark blow out preventer breakout cathead
backoff beneficiate blow-by breakout tongs
back-pressure beneficiation blowdown breakthrough
back-pressure valve Benioff zone blowdown valve (BDV) bridge
backscatter benthos blowout bridge off
back-stripping bentonite blowout preventer bridge plug
backup curve bentonite equivalent BLPD bridge-off
back-up ring bevel gear operated (BGO) valve BM bridging agent
backward multiple-contact test BGG BOD bridging material
backwash BHA body relief valve (BRV) bridle
bactericide BHCT body wave Briggs color cube
bad hole BHP Boltzmann probability distribution bright spot
balance point BHST bomb brine
balanced activity oil mud BHT bond log bring in the well
balanced array bias Bond number British thermal unit
balanced plug bias weld bonnet broadside array
balanced-activity oil mud bicarb bonus consideration bromocresol green
ball catcher bicarbonate Boolean simulation Brookfield viscometer
ball diverter bicenter bit booster brownfield
ball operated bichromate salt BOP Brownian motion
ball out big hole charge BOP stack brute stack
ball sealers big-hole charge BOPD bubble count
ball-operated bilinear flow borehole bubble effect
ballout bimetallic corrosion borehole compensation bubble flow
band pass bimetallism borehole correction bubble point
band reject bin borehole gravity bubblepoint
band-pass Bingham plastic model borehole gravity meter bubble-tight shutoff
band-reject bioaccumulation borehole orientation bucking coil
bank firing bioassay borehole seismic data bucking current
barefoot completion biochemical oxygen demand borehole televiewer buffer
barite biocide Born method buffer solution
barite plug bioconcentration bottle test buffered mud
barrel equivalent biodegradation bottomhole assembly buffered solution
barrel pump biopolymer bottomhole choke buggy vibro
barrels of liquid per day biostratigraphic bottomhole circulating temperature buildup test
barrels of oil per day biostratigraphy bottomhole gas separator bulk modulus
barrels of water per day Biot theory bottomhole heater bulk relaxation
base exchange bird bottomhole injection pressure (bhip) bulk volume
base log birefringence bottomhole pressure bull plug
base map bit bottomhole sampler bullet perforating
base of weathering bit box bottomhole shut in bullhead
base oil bit breaker bottomhole shut-in bundle
base slurry bit nozzle bottomhole static temperature buoyancy
base station bit record bottomhole temperature buoyancy method
baseline bit resistivity bottoms up burn shoe
basement bit trip bottoms up mud sample butt weld
basic wavelet bitumen bottoms-up butterfly chart
basin bivariate analysis bottoms-up mud sample butterfly valve
basket flowmeter black list Bouguer anomaly button resistivity
batch mixer Blaine fineness Bouguer correction buttress thread
batch treatment bland coring fluid Bouma sequence BWOC
bathyal blank pipe bound fluid BWOW
battery blast joint bound water BWPD
battery site blast sleeve boundary conditions by weight of cement
Bayesian inference blasting cap bound-fluid log by weight of water
Bayesian probability bleed off bow tie bypass
Bc bleedoff line box bypass velocity
Bcf/D blended crude Boyle's Law bypassed mud
bead tracer blender


C pump cement plug coal seam gas contamination gas
cable cement retainer coalbed methane continental shelf
cable head cement squeeze coal-bed methane contingency plan
cable-tool drilling cementation coalesce continuous gas lift
cake cementation exponent coalescence continuous reservoir
cake thickness cementing coal-seam gas contour
calcite cementing plug coarse contour interval
calcium carbonate centipoise coating contour map
calcium carbonate plug centralizer coating flaw contract depth
calcium chloride centrifugal pump COD control line
calcium contamination centrifuge coding control valve
calcium hydroxide CERCLA COFCAW controlled time survey
calcium mud cesium acetate cogeneration convection
calcium naphthenate cesium formate coherence conventional mud
calcium oxide chain tongs coherence map conventional reservoir
calcium sulfate chalk coherence vector map convergence
calcium test channel coherent convergent
calibration channel wave coherent noise conveyance
caliche channeling coiled tubing convolution
caliper log character coiled tubing completion convolve
camera charged zone coiled tubing connector copolymer
cap Charpy test coiled tubing drilling copper carbonate
cap rock check shot survey coiled tubing string core
cap the well check valve coiled tubing unit core analysis
capacitance log check-shot survey coke core gamma log
capacitance meter chelating agent cokriging core image
capillary number chelation cold heavy oil production with sand core plug
capillary pressure curve chemical barrel cold production core testing
capillary suction time test chemical cutter collapse pressure coreflooding
capillary tube viscometer chemical diverter collar coring fluid
capillary-suction-time test chemical flooding collar locator corkscrew hole
caprock chemical injection collar lock corrected gamma ray
caprock effect chemical marker injection collar log correcting pressure to a datum
capsule gun chemical neutron source collector correlate
carbide lag test chemical oxygen demand collision correlation
carbon density chemical potential colloid correlation log
carbon dioxide chemical wash colloidal corrosion
carbonate chemical-marker injection colloidal solids corrosion control
carbonate gamma ray Chenevert Method colloidal suspension corrosion coupon
carbonate ion chert combi BOP corrosion fatigue
carbonate scale cherty combination string corrosion inhibitor
carbonate test chloride test commercial rate corrosion rate
carboxymethyl hydroxyethylcellulose chlorite commingled completion corrosion-resistant alloy (CRA)
carboxymethyl starch choke commingled flow cosolvent
carboxymethylcellulose choke line common depth point cost oil
carried working interest choke manifold common midpoint cosurfactant
carrier fluid CHOPS common midpoint method counterbalance winch
carry over Christmas tree common receiver gather coupling
carrying capacity chromate salt common reflection point coupon
carryover chrome free common source gather CPMG
cartridge chrome lignite common-receiver gather cracking
cased hole chrome lignosulfonate common-source gather craton
casing chrome tubing communitization creaming
casing bowl chrome-free compaction cresting
casing burst pressure chromic salt compaction correction CRG
casing centralizer chronostratigraphic chart company man critical angle
casing collar chronostratigraphy company representative critical damping
casing collar locator (CCL) churn flow compartment critical flow rate
casing collar log CI compartmentalization critical matrix
casing completion circle shooting compatibility critical moment
casing grade circulate compatible scales critical reflection
casing gun circulate out compensated density log crooked hole
casing hanger circulation device compensated neutron log crop out
casing hardware circulation loss compensated-density log cross dipole
casing head circulation sub competent cross over
casing inspection log circulation system completion cross section
casing joint circulation time completion fluid crosscorrelate
casing patch circulation valve completion quality (CQ) crosscorrelation
casing point citric acid completion skin crosscorrelation flowmeter
casing potential profile city gate complex trace analysis crossflow
casing pressure classical reservoir modeling complex-trace analysis crossline
casing reciprocation clastic intrusion composite frac tree crosslinker
casing roller clastic sediment composite log crossover
casing scraper clathrate compositional fluid analysis crossover service tool
casing shoe clay compressibility crossplot
casing shoe test clay bound water compression ratio crossplot porosity
casing string clay extender compressional wave cross-sectional
casing swage clay stabilizer compression-set packer crosswell electromagnetic tomography
casing valve clay swelling compressor crosswell reflection tomography
casinghead clay water interaction compressor plant crosswell seismic tomography
casing-inspection log clay-bound water Compton scattering crosswell tomography
casing-potential profile clay-water interaction computed tomography crown block
cat line clean concentric fold crushed zone
cataclasite clean out conceptual model crust
cataclastic cleanout concession crustal magnetic field
catagenesis cleanup condensate crystallization temperature
cathead clear brine condensate liquids CSG
cathode clear water drilling condensed section CSS
cathodic protection clear-water drilling condensing drive CT
cation clevis conditional simulation cubic packing
cation exchange capacity close in conductance cultural anomaly
cation-exchange capacity closed chamber testing conductive invasion cultural noise
cationic closed mud system conductive rock matrix model curve
catline closed-chamber testing conductivity curve matching
catwalk close-in conductometric titration cushion
caustic extraction test closing unit conductor pipe cut
caustic potash closure conformable cut and thread fishing technique
caustic soda closure pressure conformity cut oil
cave effect cloud point conical projection cut point
cavings cloud point glycol coning cut-and-thread fishing technique
cavitation cluster connate water Cutt point
CBM cluster analysis connection cuttings
CDP CMC connection gas cuttings lifting
CEC CMC-Hi Vis consistency CWA
cellar CMC-HVT consistometer cycle condensate
cellulosic polymer CMC-Lo Vis consolidated cycle gas
cement CMC-LVT consolidation cycle skip
cement accelerator CMHEC constant composition expansion cycle time
cement additive CMP constant rate cyclic steam injection
cement bond log CMS contact cycling plant
cement dispersant CO2 injection contact angle cyclothem
cement evaluation log coal contact time cylinder
cement extender coal bed methane contaminant cylinder operator
cement head coal gasification


damage derrick floor directional drilling drill collar
damaged zone derrickman directional permeability drill in fluid
damping desander directional survey drill noise vertical seismic profile
darcy desiccant directional variograms drill pipe
Darcy units desilter directional well drill ship
datum detectable limit directivity drill solids
day rate detector dirty drill string
daylight tour detergency disconformity drillable packer
dB deterministic deconvolution discontinuity drilled solids
DD deterministic methods disharmonic driller
DEA unit detonating cord dispersant driller's depth
dead oil detonator dispersed bubble flow drill-in fluid
Dean-Stark extraction detrital dispersed clay drilling break
decibel detritus dispersion drilling contractor
decollement development displacement drilling crew
deconvolution deviated drilling displacement efficiency drilling detergent
deep induction deviated hole displacement fluid drilling fluid
deep penetrating charge deviation disposal well drilling foreman
deep seismic sounding deviation survey dissolved solids drilling mud
deep tow dew point distillation extraction drilling procedure
deep-penetrating charge dewatering distortion drilling program
deepwater play dewpoint distributed temperature log drilling rate
deep-water play diagenesis distributed-temperature log drilling rig
deflector flowmeter diagenetic distribution drilling riser
deflocculant diagenetic porosity diurnal variation drilling-fluid engineer
deflocculate diameter of invasion divergence drill-noise vertical seismic profile
deflocculated mud diameter of investigation diversion drillpipe
deflocculation diamond bit diverter drillpipe conveyed
defoamer diapir diverter flowmeter drillship
degasser diatom diverting agent drillstem
degree API diatomaceous division order drillstem test
dehydrate diatomite Dix formula drillstring
dehydration dichromate salt DMO drip
dehydrator dielectric dog collar drip accumulator
delay rental dielectric permittivity dog house drop ball
deliverability test dielectric propagation log dog leg drop bar
delta dielectric resistivity doghouse drop sub
delta rho diesel oil mud dogleg dropoff gun
delta t diesel-oil mud dolomite drop-off gun
delta t stretch diesel-oil plug dolomitization dropout
deltaic difference map dolostone dry bed
delta-t stretch differential compaction domain dry bed dehydrator
demulsifier differential pressure domainal fabric dry combustion
densimeter differential pressure sticking domainal structure dry forward combustion
densitometer differential sticking dome dry gas
density differential temperature log dope dry hole
density contrast differential weathering correction dosing pump dry oil
density current differential-temperature log double block-and-bleed dry-bed dehydrator
density measurement difficult to disperse double refraction DSS
density profile difficult to disperse in salt down dip DST
departure curve diffraction down lap DST pressure chart
dephasing diffraction stack down stream dual completion
depleted zone diffusion downdip dual induction
depletion diffusion equation downhole gauge dual permeability reservoir
deployment system diffusion relaxation downhole safety valve (DSV) dual porosity reservoir
deposit dike downhole sensors dual water
depositional energy dilatancy theory downlap dual-permeability reservoir
depositional environment dilatation downstream dual-porosity reservoir
depositional system dilatational wave downward continuation due diligence
depth control diluent Draeger tube dummy valve
depth conversion dilution drag bag dump bailer
depth datum dilution water drag bit duplex pump
depth derived dim spot drag-bag duster
depth mark dip Dräger tube dye penetrant inspection
depth matched dip correction drain hole dyke
depth matching dip fault drainage area dynamic correction
depth migration dip moveout drainage volume dynamic filter press
depth of invasion dip tube drained test dynamic filtration
depth of investigation dipole drainhole dynamic fluid level
depth point dipole field drape dynamic miscibility
depth reference dipping bed draw down dynamic positioning
depth section direct emulsifier drawdown dynamic range
depth wheel direct hydrocarbon typing drawdown test dynamic-aging test
depth-derived direct indicating viscometer drawworks dynamite
derivative logs direct-indicating viscometer drift dynamometer card
derrick directional driller drill bit


early time transient data electric submersible pump encapsulation ESP
early-time transient data electrical anisotropy end point estimated ultimate recovery
earthquake electrical conductivity endfire array estuarine
easy to disperse electrical coupon endless tubing eta (η)
easy to disperse in salt electrical double layer endpoint Euclidian dimension
eccentralizer electrical impedance probe enhanced diffusion Euclidian distance
eccentric electrical log enhanced oil recovery eustasy
eccentricity electrical permittivity entrained gas eustatic
ECD electrical resistance probe entrance hole evaporation pit
EDA electrical resistivity environmental corrections evaporite
eddy current electrical stability test eolian evaporitic
eddy current measurement electrical survey EOR evening tour
eddy-current measurement electrode device Eötvös number event
EDTA electrode resistivity EPA excavation effect
eel electrodynamic brake Epanechnikov kernel excess cement
effective medium theory electrohygrometer epithermal neutron porosity measurement exit velocity
effective permeability electrokinetic potential epm expanding cement
effective porosity electromagnetic caliper epsilon (ε) expanding gate valve
effective shot density electromagnetic heating equalizing valve expansion joint
effective velocity electromagnetic method equation of state expectation
effective water saturation electromagnetic propagation equipotential method expendable gun
effective wellbore radius electromagnetic propagation measurement equivalent circulating density expendable plug
eigenvector electromagnetic thickness equivalent conductance expert system
elastic elemental capture spectroscopy equivalent sack exploration
elastic anisotropy elevation correction equivalent water resistivity exploration play
elastic constants elevator equivalent weight exploratory
elastic deformation embedded wavelet ERD explosive seismic data
elastic impedance embrittlement erode extended reach drilling
elastic limit emergency shutdown valve (ESDV) erosion extended-reach drilling
elastic moduli empirical erosion corrosion extensive dilatancy anisotropy
elastic neutron scattering emulsifier erosion-corrosion external cutter
elasticity emulsion error external disturbance field
electric gas lift valves emulsion flow ES test external pulling tool
electric gas-lift valves emulsion mud escape line external upset
electric probe en echelon


fabric fines migration flow profile four dimensional seismic data
facies fingerboard flow regime four-component seismic data
facies modeling fingering flow simulation four-dimensional seismic data
fairway finite conductivity fracture flow structure Fourier analysis
fall off test finite wellbore solution flow unit Fourier synthesis
falloff test finite-conductivity fracture flow-after-flow tests Fourier transform
fan shooting finite-wellbore solution flow-concentrating Fourier transform infrared spectroscopy
Fann viscometer fire flooding flower structure FPSO
far water fireflooding flowing neutron log frac balls
farmee firing head flowing well frac crew
farmor first arrival flowline frac fluid
farmout first break flowline mud sample frac gel
fast diffusion first reading flowline sample frac gradient
fast formation first-contact miscibility flowmeter frac gun
fast formation arrival fish flowstream sample frac iron
fast Fourier transform fish eye flue gas frac job
fast neutron reaction fishbone wells fluid compatibility test frac manifold
fast-formation arrival fishing fluid compressibility frac pump
fast-neutron reaction fishing bell fluid contact frac stack
fatty acid fishing diagram fluid density log frac tree
fatty acid soap fishing neck fluid flow frac valve
fatty-acid soap fishing tool fluid interface log fractal
fault fitting fluid loss fractal analysis
fault trap five spot fluid loss control fractal networks
Faye correction five-spot fluid loss control material fracture
FD fixed choke fluid pound fracture acidizing
feldspar fixed source method fluid-density log fracture conductivity
felsic fixed-cutter bit fluid-friction reducer fracture half-length
fence diagram fixed-source method fluid-interface log fracture networks
Fermat's principle f-k domain fluid-loss additive fracture permeability
ferro-chrome lignosulfonate f-k plot fluid-loss control fracture porosity
ferrous sulfide flag fluid-loss-control material fractured well analysis
FFT flag joint fluoboric acid fractured-well analysis
fiber LCM flake LCM fluoroscopy fracturing fluid
fiber lost circulation material flake lost circulation material flush joint fracturing mandrel
fiber lost-circulation material flake lost-circulation material flushed zone fracturing manifold
field flange flushed zone water saturation fracturing pressure
field weld flapper valve flushed-zone water saturation fracturing sleeve
fill cement flare fluvial free air correction
fill sub flash point flux leakage free fluid
film forming amine flat gels fly ash free gas
film-forming amine flattened section foam breaker free induction decay
filter flexural mode foam diversion free point
filter cake FLNG foam flooding free point indicator
filter cake quality float collar foamed cement free water
filter cake thickness float joint foaming agent free water knockout
filter cell float shoe foamy oil free-air correction
filter medium floc fold free-induction decay
filter press flocculant footprint free-point indicator
filtercake flocculate foreign content free-water knockout
filtercake quality flocculation formaldehyde frequency
filter-cake quality flooding pattern formate frequency domain
filtercake thickness flooding surface formation fresh core
filter-cake thickness flow after flow formation damage fresh water
filtered brine flow after flow tests formation evaluation Fresnel zone
filters flow assurance formation evaluation while drilling friction effect
filtrate flow check formation factor friction reducer
filtrate slump flow concentrating formation fluid froth flow
filtrate tracer flow coupling formation fracture pressure FT
filtration flow cross formation pressure FTIR
filtration test cell flow efficiency formation water full waveform
filtration tester flow line formic acid Full-azimuth towed-streamer acquisition
final flow period flow loop forward modeling fullbore
final shut in period flow meter forward multiple-contact test fullbore spinner
final shut-in period flow model forward problem funnel viscosity
fine flow period four component seismic data FWKO


Gal gas-holdup log geopressured graveyard tour
galena gas-lift mandrel geostatic pressure gravimeter
Galling gas-lift valve geostatistical methods gravimetry
galvanic anodes gas-oil contact geostatistical modeling gravity
gamma (γ) gas-prone geostatistics gravity anomaly
gamma ray densitometer gas-water contact geosteer gravity drainage
gamma ray interactions gate valve geosteering gravity override
gamma ray log gather geothermal gradient gravity segregation
gamma-gamma log gathering system Geronimo line gravity survey
Garrett Gas Train gauge hole GGT gravity toolface
gas anchor gauge pressure ghost gravity units
gas bearing gauge ring Gibbs' phenomenon gravity-stable displacement
gas buster gauge tank GIIP gray list
gas cap Gaussian collocated cosimulation gilsonite grease injection system
gas cap drive Gaussian techniques glacial grease-injection system
gas chimney gel glass jar test greasing out
gas condensate gel strength glauconite green gas
gas coning gelled mud Global Positioning System green list
gas cut mud gelled up mud globe valve grey list
gas deviation factor gelled-up mud glycol grid
gas drive generation glycol absorber gridding
gas formation volume factor geochemical log glycol dehydrator gridding algorithm
gas gravity geochemistry glyph grind
gas holdup log geochronology GOC gripper blocks
gas hydrate geologic goose neck ground roll
gas injection geologic map gooseneck group velocity
gas interference geologic time scale government take growth fault
gas lift geological GPS guar gum
gas lift mandrel geologist GPTS guard electrode
gas lift valve geology GR guard log
gas lock geomagnetic polarity reversal graben guide shoe
gas migration geomagnetic polarity time scale gradiomanometer guided wave
gas oil contact geomagnetic secular variation grain density gumbo
gas prone geomechanics granite gun
gas sand geometric granular LCM gun barrel
gas separator geometrical factor granular lost circulation material gun clearance
gas shale geophone granular lost-circulation material gun the pits
gas show geophone array grapple gun zero
gas water contact geophone cable gravel pack gunk plug
gas well geophone offset gravel pack gun gunk squeeze
gas/oil ratio (GOR) geophone pattern gravel pack log gunning the pits
gas-bearing geophysicist gravel pack screen GWC
gas-cap drive geophysics gravel-pack gun gyp mud
gas-cut mud geopressure gravel-pack log gypsum
gasdrive geopressure gradient gravel-pack screen


H2S hiatus horizontal resistivity hydraulic horsepower
hade hierarchical cluster analysis horizontal separator hydraulic packer
haematite high explosive horizontal severance hydraulic power pack
halite high pressure squeeze horizontal transverse isotropy hydraulic power unit
halo effect high shot density gun horizontal tree hydraulic pumping
hammer union high side toolface Horner slope hydraulic release tool
hard rock high temperature completions horst hydraulic set
hardbanding high-gravity solids hostile environment hydraulic-set
hardfacing high-pressure air injection hot lime hydrocarbon
hardground high-pressure manifold hot oiler hydrocarbon indicator
hardness ion high-pressure squeeze hot oiling hydrocarbon kitchen
harmonic high-pressure, high-temperature hot tapping hydrochloric acid
HBP high-pressure, high-temperature filtration test hot waterflooding hydrocyclone
HCl high-pressure, high-temperature viscometer Hough transform hydrocycloning
HE starch high-shot density gun HP starch hydrofluoric acid
head highside toolface HPHT hydrofluoric hydrochloric acid
head wave high-side toolface HPHT filtration test hydrofluoric-hydrochloric acid
header high-specific-gravity solids HPHT viscometer hydrogen blistering
heading highstand systems tract HPU hydrogen embrittlement
heater history matching HSE hydrogen index
heater treater HLB number HTI hydrogen induced failures
heavy metal hodogram HUD hydrogen probe
heavy oil holdup huff and puff hydrogen sulfide
heavy pipe holdup depth Humble formula hydrolysis
heavyweight drillpipe holdup image humic acid hydrometer
HEC holdup log humidity hydrophile-lipophile balance number
hectorite holdup map humidity meter hydrophilic
held by production holdup meter humping hydrophobic
hematite hole cleaning HWDP hydrophone
Herschel Bulkley fluid homogeneity hybrid scale hydrostatic bailer
Herschel-Bulkley fluid homogeneous hydrate hydrostatic head
hertz homogeneous formation hydration hydrostatic pressure
hesitation squeeze hook hydraulic bypass hydrothermal
heterogeneity hook load hydraulic cement hydrothermal alteration
heterogeneous hookwall packer hydraulic centralizer hydroxyethyl starch
heterogeneous formation hopper hydraulic disconnect hydroxyethylcellulose
HF horizon hydraulic fracture monitoring hydroxypropyl starch
HGS horizon slice hydraulic fracturing hygrometer
HHP horizontal drilling hydraulic head hygroscopic


ICD inelastic neutron scattering injectite inverse filter
ICV inert sulfide injectivity test inverse problem
ID inertial resistance injector head inversion
ideal gas infill drilling in-line invert emulsion
IEOM infinite acting radial flow inner seat ring invert emulsion oil mud
igneous infinite acting reservoir insert invert-emulsion oil mud
illite infinite conductivity fracture inside blowout preventer IO
ilmenite infinite-acting reservoir inside diameter ion exchange
IM infinite-conductivity fracture inside-out air seat test IP
image inflatable packer in-situ IPA
image well inflow control device in-situ combustion IPR
imbibition inflow control valve in-situ fluid analysis iron carbonate
immature inflow performance relationship in-situ viscosity evaluation iron oxide
immiscible information theory instrument hanger iron stabilizer
impedance inhibit instrumented pig iron sulfide
impermeable inhibited acid intelligent well iron-oxidizing bacteria
impermeable barrier inhibition intensifier irreducible water
impressed current anodes inhibitive mud interfacial tension ISO
improved oil recovery inhibitor interference testing isochore
impulse activation initial flow period intermediate isochron map
impulsive seismic data initial reservoir pressure intermediate casing isochronal test
in line initial shut in period intermediate casing string isolated porosity
in situ initial shut-in period intermittent gas lift isomerized olefin
in situ combustion injection gas internal flash isopach
in situ fluid analysis injection line internal pulling tool isopropanol
in situ viscosity evaluation injection mandrel international nautical mile isopropyl alcohol
incident angle injection pattern interpolation isostasy
inclination injection pressure interpretation isostatic
incompetent injection pulsed neutron log interstitial water isostatic correction
indicator injection pump interval method isotropic
indicator methods injection test interval transit time isotropic formation
induced gamma ray spectroscopy injection water interval velocity isotropic permeability
induced particle plugging injection well interwell tomography isotropy
induced polarization injection well testing invaded zone iterative forward modeling
induction injection/pulsed neutron log invasion iterative methods
induction electrical survey injection-well testing inverse


J factor jar test jet perforating Joule-Thomson
J slot jet jet pump J-slot
jacking frame jet cutter jet velocity jug hustler
jackup jet hopper joint junk
jackup rig jet mixer Joule Thomson junk basket
jar jet nozzle


K coefficient kerogen kill pump k-means cluster analysis
kaolinite key stop kill weight fluid knock out
karst keyseat kill-weight fluid knockout
KB kh kill-weight mud knot
kelly kick kilogram per cubic meter Koch curve
kelly bushing kick off kilopascal kriging
kelly down kickoff kinetic effect kriging weights
kelly hose kill Kirchhoff migration kurtosis
kelly spinner kill line


lacustrine lean oil liquid additive longitudinal plot
lag lease liquid blocking longitudinal relaxation
lag gas least time path liquid desiccant long-path multiple
lag time least-time path liquid saturation method long-spacing sonic log
Lamé constant leonardite liquid-junction potential loose emulsion
laminar flow levelwind listric fault lost circulation
laminated sand LGS lithification lost circulation material
lamination licensing round lithofacies lost returns
landing collar life of the well lithologic lost-circulation material
landing nipple lifting frame lithologic contact LOT
LAO lifting sub lithosphere Love wave
Laplace equation light crude oil lithostatic pressure low colloid oil mud
laser diffraction light hydrocarbons lithostratigraphic low gravity solids
last reading light pipe lithostratigraphic inversion low solids mud
last-shot detection lignin lithostratigraphy low solids nondispersed mud
late time transient data lignite littoral low specific gravity solids
lateral lignosulfonate live cement low velocity layer
late-time transient data lime mud live oil low yield clay
latex limestone LNGC low-colloid oil mud
layer limestone compatible scale load cell low-gravity solids
layer cake geometry limestone porosity unit load oil low-pressure, low-temperature filtration test
layer stripping limestone-compatible scale local content low-salinity waterflooding
layer-cake geometry limited entry local holdup low-solids mud
layered reservoir testing line drive local magnetic interference low-solids, nondispersed mud
lb/bbl line source solution local probe low-specific-gravity solids
lbm/bbl lineament lock lowstand systems tract
LC50 linear alphaolefin lock mandrel low-velocity layer
LCM linear flow lock-up low-yield clay
lead acetate test liner log LS
lead cement liner hanger logarithmic mean lubricant
leak detection liner patch logging run lubricator
leak off line-source solution logging tool LWD
leakoff lip seal logging unit lyophilic
leakoff test lipophilic logging while drilling lyophilic colloid
leaky mode liquefied natural gas logging-while-drilling lyophobic
lean gas liquefied natural gas carrier long path multiple lyophobic colloid
lean glycol liquefied petroleum gas long spacing sonic log


m measurement range million standard cubic feet MT
Mf measurements while drilling mils per year penetration mud
Ma measurements-while-drilling mineral mud acid
mafic measuring tank mineral interest mud aging cell
magnesium test mechanical diversion mineralogy mud anchor
magnetic constant mechanical jar Minerals Management Service mud balance
magnetic field mechanical skin minifrac mud cell
magnetic flux leakage mechanical specific energy minimum miscibility concentration mud cleaner
magnetic mud mechanical sticking minimum miscibility enrichment mud cup
magnetic permeability median minimum miscibility pressure mud density
magnetic resonance medium minimum restriction mud engineer
magnetic reversal sequence medium induction minimum time path mud filtrate
magnetic toolface membrane potential minimum-time path mud hopper
magnetic total field memory gauge minute mark mud in
magnetic-flux leakage meniscus mis tie mud in sample
magnetics mercury displacement method miscible displacement mud motor
magnetotelluric method metagenesis missile mud oven
main magnetic field metal gain mist mud pit
make a connection metal loss mist drilling mud program
make up metal-to-metal seal mist extractor mud pulse telemetry
make up water metamorphic mist flow mud report
makeup cathead metamorphism mis-tie mud retort
makeup tongs meter capacity mixed deposits mud return line
make-up water meter factor mixed metal hydroxide mud scale
managed pressure drilling meter slippage mixed metal silicate mud still
mandrel methane mixed-metal hydroxide mud tracer
manifold methane hydrate mixed-metal silicate mud up
mantle methyl orange MMC mud weight
map methyl orange alkalinity MME mud-aging cell
marginal well methylene blue dye MMH mudcake
marine drilling riser methylene blue test MMS mudding off
marine flooding surface methylglucoside drilling fluid MMscf mudding up
marker bed mica mobility mud-in sample
marker joint micellar polymer flooding mobility buffer mudrock
marketing agreement micellar-polymer flooding mobility control Multiazimuth towed-streamer acquisition
marl micelle mobility ratio multi-capacitance flowmeter
marsh micrite model multicomponent seismic data
Marsh funnel microannulus modified isochronal test multifinger caliper
Marsh funnel viscosity microbial enhanced oil recovery modulus of compression multipass method
mass balance microcylindrical log modulus of elasticity multiphase flow
massif microemulsion modulus of rigidity multiphase fluid
mast microgel Moho multiphase fluid flow
master valve microlaterolog Mohorovicic discontinuity multiphase holdup log
material balance microlog moldic porosity multiphase meter
material balance equation micropaleontology moment multiphase pump
Material Safety Data Sheet microporosity monomer multiple completion
material-balance equation microresistivity monopole multiple isotope log
matrix microseismic monitoring Monte Carlo risk analysis multiple rate tests
matrix acidizing microspherical log Monte Carlo sampling multiple reflection
matrix stimulation middle time transient data Monte Carlo simulation multiple regression
maturation middle-time transient data montmorillonite multiple salinity
maturity midoceanic ridge monument multiple service contract
maximum flooding surface midpoint morning tour multiple-contact miscibility
maximum recorded temperature midrange mousehole multiple-isotope log
maximum treating pressure migrate moveable hydrocarbons multiple-rate tests
maximum working pressure (MWP) migration moved hydrocarbons multishot survey
Maxwell's equations Milankovitch cycles moveout mute
MBT test mill moving-source method mutual solvent
MD mill out mpy MWD
mean mill shoe MRS My
measure point milligrams per kilogram Mscf/d MYBP
measured depth milligrams per liter MSDS mysid shrimp
measurement after drilling milling MSE


n near-surface correction nipple down nonideal gas
NACE neat cement nipple up non-Newtonian fluid
naphthene base crude oil needle valve nipple-down nonparticipating royalty
naphthene-base crude oil neritic nitrified fluid nonparticipating royalty interest
naphthenic hydrocarbon nest nitrogen cushion normal
Narrow-azimuth seismic data nested fractal structures nitrogen injection normal fault
native clay net oil production nitrogen kickoff normal incidence
native solids mud net profits interest nitrogen lift normal mode
native state core net revenue interest nitrogen unit normal moveout
native-solids mud neural networks NMO normal moveout correction
natural completion neutralization NMR normal pressure
natural fracture neutralize no go landing nipple normality
natural frequency neutralizing solution NODAL* analysis normal-moveout correction
natural gamma ray spectroscopy neutron activation log no-go landing nipple NPDES
natural gas neutron capture noise NRM
natural gas liquids neutron generator noise log nuclear fluid densimeter
natural gasoline neutron interactions nonconductive drilling fluid nuclear magnetic resonance
natural remanent magnetism neutron log nonconformity nuclear magnetic resonance measurement
naturally flowing well neutron porosity non-Darcy flow numerical methods
naturally occurring radioactive materials (NORM) neutron-activation log nondipole field numerical model
nautical mile Newtonian fluid nonhydrocarbon contaminants numerical reservoir simulation
near surface correction nipple


OBC oil on cuttings onlap orogeny
OBR oil prone OOC OSHA
Occam's inversion oil sand open flow potential osmosis
ocean-bottom cable oil swelling open hole osmotic pressure
OCMA oil water contact open-flow potential OSPAR
octahedral layer oil water interface openhole outcrop
OD oil well openhole completion outside diameter
off pattern well oil wet openhole gravel pack ovality limit
off-pattern well oil/brine ratio openhole packer over travel
offset oil/water ratio openhole test overbalance
offset vertical seismic profile oil-base mud opening bomb overburden
offset VSP oil-emulsion mud operating gas-lift valve (OGLV) overflush
offset well oilfield operating interest overmature
Ohm's law oilfield battery operator overpressure
oil and gas lease oil-in-water emulsion optical index overriding royalty
oil and gas separator oil-mud emulsifier optical probe overriding royalty interest
oil bank oil-prone organic acid overshot
oil base mud oil-water contact organic deposit overthrust
oil content oil-water interface organophilic overtravel
oil emulsion mud oil-wet organophilic clay OWC
oil field olefinic hydrocarbon organophilic lignite OWR
oil formation volume factor oligomer orifice meter oxide closure model
oil in water emulsion one dimensional seismic data orifice valve oxide-closure model
oil kitchen one way time O-ring oxygen activation
oil mining one-dimensional seismic data orogenic oxygen scavenger
oil mud one-way time


p wave permittivity polished rod pressure-drawdown analysis
P&A perpendicular offset polyacrylamide pressure-squared plot
Pf perpendicular resistivity polyacrylate pressure-transient analysis
Pm petal basket flowmeter polyalkalene glycol pressure-transient well tests
PAC petrographic polyalphaolefin pressurized mud balance
pack off petrography polyanionic cellulose primary cementing
packer petroleum polycrystalline diamond compact bit primary completion components
packer flowmeter petroleum system polyelectrolyte primary migration
packer fluid petroleum systems modeling polyglycerol primary porosity
packing petrologic polymer primary production
packing gland petrology polymer flooding primary recovery
packoff petrophysical model polymer plug primary recovery method
pad petrophysical rock type polyol primary reflection
paddle blender pH polyolefin primary term
paddle mixer pH test polyphosphates prime mover
PAG phase polysaccharide primer cord
paid up lease phase redistribution pony rod principal axis
paid-up lease phase shift pooling principal component analysis
pair production phase shift resistivity poppet valve probe
paleontology phase velocity pore processing
paludal phase velocity log pore pressure produced fluid
palynology phase-shift resistivity pore pressure gradient produced water
PAO phase-velocity log pore pressure transmission producing formation
paraffin phenolphthalein pore throat production
paraffin base crude oil phosphate salt pore-pressure gradient production bonus
paraffin control photoelectric effect pore-pressure transmission production casing
paraffin inhibitor photon log porosimeter production log
paraffin scraper PHPA porosity production packer
paraffin scratcher PHPA mud porosity exponent production payment
paraffin-base crude oil PI porous production penalty
paraffinic hydrocarbon pick porous plate technique production service contract
paraformaldehyde Pickett plot portland cement production sharing contract
parallel fold pickle portland cement clinker production string
parallel resistivity pickling fluid positive displacement motor production tubing
parameter pickup positive displacement pump production wing
parametric pick-up positive-displacement pump productivity index (PI)
parasequence pig post productivity test
parasequence set pill post mature profile
PARCOM pilot test post-mature profile modification
partial completion pilot-operated regulator potassium profiling
partial penetration pin potassium ion progradation
participating interest pinch-out potassium mud progressive cavity pumping system
particle plugging apparatus pipe dope potential field progressive gels
particle size distribution pipe heavy pounds per barrel propagation constant
particle-plugging apparatus pipe light pour point propagation resistivity
particle-plugging test pipe rack power fluid injection rate propagation resistivity measurement
particle-size distribution pipe ram power law fluid propagation time
partitioning pipe trip power oil proppant
parts per million pipeline power-fluid injection rate propylene glycol normal propyl ether
party pipeline capacity power-law fluid prorated well
party chief pipeline gas pozzolan proration unit
party manager pipeline oil pozzolanic prospect
pascal pipeline patrol PPA proximity log
passive margin PIT ppb pseudogeometrical factor
pay pitch-and-lead ppg pseudoplastic
payout Pitot tube ppm pseudopressure plot
PDC bit pitting PPT pseudostatic spontaneous potential
PDM plane table precipitate pseudosteady state
peak plane wave precipitation pull up
peak shaving plankton precision pulling tool
PEF plant preferential right to operate pull-up
peg leg multiple plastic preferential right to purchase pulse echo
peg-leg multiple plastic deformation preflush pulsed neutron holdup log
pendant-drop tensiometer plastic viscosity pregelatinized starch pulsed neutron spectroscopy log
penetration rate plate out prehydrate pulsed neutron spectroscopy measurement
peptization plate tectonics prehydrated bentonite pulsed-neutron holdup log
peptize plateau prehydration pulse-echo
peptized clay platform premium thread pump barrel
peptizing agent play preservation pump cavitation
perforate play back preservative pump manifold
perforate overbalanced playback preserved core pump off
perforate underbalanced plug and abandon pressure pump submergence
perforated interval plug flow pressure buildup pump volumetric efficiency
perforated liner plug valve pressure buildup analysis pumpability
perforating acid plugging material pressure capability pumper
perforating charge plunger lift pressure depletion pumping schedule
perforating depth control log plunger overtravel pressure drawdown pumping time
perforating depth-control log PNP pressure gauge pumping well
perforating fluid POD pressure gradient pumping well tests
perforating gun point bar pressure hunt pump-off
perforation penetration point of departure pressure integrity test push down
perforation phasing poise pressure sender push-down
periodogram Poisson distribution pressure squared plot pusher
permafrost Poisson's ratio pressure storage tank PV
permanent datum polar pressure transient analysis PVT
permanent well monitoring polar compound pressure transient test P-wave
permeability polarity standard pressure transient well test pyrolysis
permeability thickness polarization horn pressure transient well tests pyrophosphate
permeable polarization time pressure-composition diagram pyrrhotite
permeameter polished joint


Q quality assurance quaternary amine quicklook
Q wave quartz quebracho quitclaim
QA quat quick lime Q-wave
quadrant density quat amine quick look


R signal recorder carrier reservoir characterization model Ricker wavelet
Rh recoverable gas lift gas reservoir description rig
Rv recovery reservoir drive mechanisms rig down
Rwa recovery factor reservoir height rig floor
rabbit recovery forecast reservoir heterogeneities rig up
racking back pipe red mud reservoir modeling right angle set
radial array redox reservoir pressure right of first refusal
radial differential temperature log reduced water slurry reservoir quality (RQ) right-angle set
radial differential-temperature log reduced-water slurry reservoir simulation rigless operation
radial faulting reducing agent reservoir-drive mechanisms RIH
radial processing reef residence time ring resistivity
radial refraction reefal residual bend ringworm corrosion
radial resolution reel residual oil rising-bubble apparatus
radial response reel back tension residual oil saturation RM
radio safe detonator reel back-tension resin road box
radio silence reeled tubing resistive invasion rock
radioactive tracer reference point resistivity rock mechanics
radioactive tracer log reflection resistivity index rock properties
radioactive-tracer log reflection coefficient resistivity log rock types
radiographic inspection reflection tomography resolution Rockwell hardness number
radio-safe detonator reflectivity resolution matched Rockwell hardness testing
radius of curvature reflector response matched rod elevators
radius of investigation refraction restored state core rod pump
ram blowout preventer refractive index retarder rod unit
ram preventer refractor retention time roller cone bit
random error refracturing retort roller stem
random noise regression retort method roller-cone bit
random walk method regressive retort solids rolling aging test
random-walk method regulatory body retort test rolling-aging test
rarefaction relative age retrievable bridge plug root mean square velocity
rate dependent skin effect relative dielectric constant retrievable gun root-mean-square velocity
rate of penetration relative dielectric permittivity retrievable packer ROP
rate of shear relative filtrate volume retrogradation ROS
rate-dependent skin effect relative humidity retrograde condensation rotary bushing
rathole relative permeability reverse circulating valve rotary drilling
raw crude oil relaxation time reverse circulation rotary hose
raw natural gas relaxed filtrate oil mud reverse combustion rotary steerable system
ray path relaxed-filtrate oil mud reverse fault rotary table
ray tracing relief valve reverse-circulating valve rotating control device
Rayleigh wave relinquishment reversing out rotational gas lift
raypath remaining oil saturation RH roughneck
RCD remedial cementing RH round thread
RCRA remote sensing rheologic round trip
real time data remotely operated vehicle rheological roustabout
real-time data repeat section rheological property routine core analysis
ream repeatability rheology ROV
receiver replacement velocity rheology modifier royalty interest
reciprocate reproducibility rhombohedral packing R-signal
reciprocating pump reserve mud pit rich gas rugosity
recirculating mixer reserve pit rich gas condensate run in hole
record reserve-mud pit rich glycol running squeeze
recorded data reservoir rich oil running tool
recorder reservoir characterization Rich-azimuth towed-streamer acquisition rupture disk


S wave shale smectite steam-assisted gravity drainage
s.g. shale baseline smectite clay steamflood
sabkha shale oil smile steam-oil ratio
sack shale shaker Snell's law stearate
sacrificial anode shaly SNG steerable motor
safety clamp shaped charge snub stem
safety head shear snubbing step profile
safety joint shear modulus snubbing jack step rate test
safety spacer shear ram soak phase stick and slip
sag shear rate soap stimulation
SAGD shear seal BOP soda ash stimulation byproduct
salt shear stock sodium bicarbonate stimulation fluid
salt dome shear strain sodium carbonate stochastic analysis
salt plug