Oilfield Glossary
Oilfield Glossary
Search by Discipline
Terms beginning with:
# A B C D E F

Search Results

Searched for "z" in All Fields (4541 result(s) found)

Variables and Numbers

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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


R signal recovery forecast reservoir drive mechanisms rift
Rh red mud reservoir height rig
Rwa redox reservoir heterogeneities rig down
rabbit reduced water slurry reservoir modeling rig floor
racking back pipe reduced-water slurry reservoir pressure rig up
radial array reducing agent reservoir quality (RQ) right angle set
radial differential temperature log reef reservoir simulation right of first refusal
radial differential-temperature log reefal reservoir-drive mechanisms right-angle set
radial processing reel residence time rigless operation
radial refraction reel back tension residual bend RIH
radial resolution reel back-tension residual oil ring resistivity
radial response reeled tubing residual oil saturation ringworm corrosion
radio safe detonator reference point resin rising-bubble apparatus
radio silence reflection resistive invasion RM
radioactive tracer reflection coefficient resistivity rock
radioactive tracer log reflection tomography resistivity index rock mechanics
radioactive-tracer log reflectivity resistivity log rock properties
radio-safe detonator reflector resolution rod elevators
radius of curvature refraction resolution matched rod pump
radius of investigation refractive index response matched rod unit
ram blowout preventer refractor restored state core roll a tank
ram preventer refracturing retarder roll line
random error regression retention time roller cone bit
random noise regression coefficient retort roller stem
random walk method regressive retort method roller-cone bit
random-walk method regulatory body retort solids rolling aging test
range of load relative age retort test rolling-aging test
rarefaction relative dielectric constant retrievable bridge plug root mean square velocity
rate dependent skin effect relative dielectric permittivity retrievable gun root-mean-square velocity
rate of penetration relative filtrate volume retrievable packer ROP
rate of shear relative humidity retrogradation ROS
rate-dependent skin effect relative permeability retrograde condensation rotary bushing
rathole relaxation time returns rotary drilling
raw crude oil relaxed filtrate oil mud reverse circulating valve rotary hose
raw natural gas relaxed-filtrate oil mud reverse circulation rotary steerable system
ray release joint reverse combustion rotary table
ray path relinquishment reverse fault rotational gas lift
ray tracing remaining oil saturation reverse-circulating valve roughneck
Rayleigh wave remedial cementing reversing out round thread
raypath remote sensing RH round trip
RCRA remotely operated vehicle RH roustabout
real time data repeat section rheologic routine core analysis
real-time data repeatability rheological ROV
ream replacement velocity rheological property royalty
receiver reproducibility rheology royalty interest
reciprocate reserve mud pit rheology modifier R-signal