Well Log Mnemonics | Additional reference: | http://www.posc.org/Epicentre.2_2/DataModel/LogicalDictionary/StandardValues/wltcachanges.html | Functions | short | Typical | |||||||

Mnemonics | Description | ? | Company | Notes | function | Scale range | Unit | |||||

2IL | dual induction focused log | Birdwell | ||||||||||

ABC | acoustic borehole compensated | Birdwell | acoustic transit time | porosity | ||||||||

AIT | Array induction tool | conductivity | conductivity | |||||||||

AO | AIT log with 1 ft vertical resolution | Schlumberger | AIT- Array induction tool, resistivity image showing bedding, HC content, invasion features | Shallow resistivity, invasion resistivity, HC saturation | resistivity | 0.2 | 2000 | ohm/m | ||||

AO10 | AIT log with 1 ft vertical resolution | Schlumberger | AIT- Array induction tool, resistivity image showing bedding, HC content, invasion features, 10 inch depth | conductivit | 0.2 | 2000 | ohm/m | |||||

AO90 | AIT log with 1 ft vertical resolution | Schlumberger | AIT- Array induction tool, resistivity image showing bedding, HC content, invasion features, 90 inch depth | conductivit | 0.2 | 2000 | ohm/m | |||||

APS EPI POR LS COR | accelerator porosity sonde epithermal porosity l | Schlumberger | bull density, neutron porosity, thin beds, high radioactivity | density po | 45 | -15 | pu | |||||

ASN | AMPLIFIED SHORT NORMAL | Schlumberger | resistivity image | |||||||||

AT | AIT log with 2 ft vertical resolution | Schlumberger | see AO | 0.2 | 2000 | ohm/m | ||||||

ARI | azimuthal resistivity imager | Schlumberger | resistivity image | image | ||||||||

BCA | borehole compensated acoustic | BPB Instruments | acoustic transit time | transit time | ||||||||

BCN | borehole compensated neutron log | NL McCullough | neutron | neutron | ||||||||

BCS | borehole compensated sonic | Gearhart | acoustic transit time | porosity | ||||||||

BGT | borehole geometry log | Schlumberger | borehole size | caliper | ||||||||

BHC | BHC acoustilog | Dresser Atlas | acoustic transit time | porosity | ||||||||

BHC | BHC sonic log | Schlumberger | acoustic transit time | porosity | ||||||||

BHGM | borehole gravity meter | Edcon | gravity | gravity | ||||||||

BMIN | Microresistivity | permeable zone id, bed boundaries, sand count, caliper, mud thickness | image | 0 | 20 | ohm/m | ||||||

BMNO | Microresistivity | permeable zone id, bed boundaries, sand count, caliper, mud thickness | image | 0 | 20 | ohm/m | ||||||

BRD | bed resolution density | BPB Instruments | density | density | ||||||||

BS | bit size | drill bit size | bit size | 6 | 16 | |||||||

BSAL | borehole salinity | ? | ||||||||||

CA3 | caliper | Birdwell | borehole size | caliper | ||||||||

CA6 | caliper | Birdwell | borehole size | caliper | ||||||||

CAL | caliper | borehole diameter | caliper | 6 | 16 | in | ||||||

CAL | caliper | Birdwell | borehole size | caliper | ||||||||

CAL | caliper | Gearhart | borehole size | caliper | ||||||||

CALI | caliper | generic | borehole size | caliper | 6 | 16 | in | |||||

CAL | caliper | Welex | borehole size | caliper | ||||||||

CALS | sonic caliper | borehole diameter | caliper | 6 | 16 | in | ||||||

CAVL | Compensated acoustic velocity log | Welex | acoustic transit time | porosity | ||||||||

CCL | casing collar locator | Schlumberger | production | |||||||||

CDL | compensated density log | BPB Instruments | density | density | ||||||||

CDL | compensated densilog | Dresser Atlas | density | density | ||||||||

CDL | compensated density log | Gearhart | density | density | ||||||||

CDL | density log compensated | Welex | density | density | ||||||||

CDN | compensated density neutron tool | Schlumberger | neutron | neutron | ||||||||

CDR | continuous directional survey | Schlumberger | borehole deviation | deviation | ||||||||

CDS | continuous deviation survey | BPB Instruments | borehole deviation | deviation | ||||||||

CDS | continuous directional survey | Gearhart | borehole deviation | deviation | ||||||||

CGR | computed gamma ray | Schlumberger | 0 | 150 | gapi | |||||||

CGSL | capture gamma spectral log | Welex | spectral gamma ray | gamma | ||||||||

CHES | cased hole evaluation | Dresser Atlas | cased hole | cased hole | ||||||||

CIDP | phasor processed deep conductivity | Schlumberger | resistivity | resistivity | 0.2 | 20 | ohm/m | |||||

CLASS | clay analysis and shaly sand evaluation | Dresser Atlas | reservoir analysis | reservoir | ||||||||

CLAYS | clay analysis | Dresser Atlas | reservoir analysis | reservoir | ||||||||

CLSD | compensated long spacing density | BPB Instruments | density | density | ||||||||

CMR | combinable magnetic resonance tool | Schlumberger | magnetic resonance | porosity | ||||||||

CMS | circumferential microsonic | Schlumberger | acoustic transit time | porosity | ||||||||

CNL | compensated neutron log | Schlumberger | hydrogen content | neutron | ||||||||

CNL | compensated neutron log n-t | Schlumberger | neutron | neutron | ||||||||

CNLog | compensated neutron log n-t and n-e | Dresser Atlas | neutron | neutron | ||||||||

CNS | compensated neutron survey n-t | Gearhart | neutron | neutron | ||||||||

COC | spectralog carbon oxygen log | Dresser Atlas | spectral gamma ray | gamma | ||||||||

CONC | contact caliper log | Welex | nonfocused microresistivity perm indicator, microlog | resistivity | ||||||||

COR | carbon oxygen ratio | Schlumberger | carbon oxygen ratio | C/O ratio | 45 | -15 | pu | |||||

CMR | combinable magentic resonance tool | Schlumberger | nuclear magnetic resonance, porosity | porosity | ||||||||

CRA | Prolog complex reservoir analysis | Dresser Atlas | reservoir analysis | reservoir | ||||||||

CSF | continuous spinner flowmeter | Dresser Atlas | production | |||||||||

CSNG | compensated spectral natural gamma log | Welex | gamma, spectral | gamma | ||||||||

CSNG | compensated spectral natural gamma log | Welex | spectral gamma ray | gamma | ||||||||

DBC | density/borehole compensated | Birdwell | density | density | ||||||||

DCAL | 1D caliper | ? | Schlumberger | caliper | caliper | |||||||

DCL | dielectric constant log | Gearhart | dielectric permittivity | resistivity | ||||||||

DCL | dielectric constant log | Welex | dielectric permittivity | resistivity | ||||||||

DDFG | dual dynamically focused guard log | Welex | focused resistivity | resistivity | ||||||||

DEL | dielectric log | Dresser Atlas | dielectric permittivity | resistivity | ||||||||

DF | fluid density log | Birdwell | fluid density | production | ||||||||

DGFL | dual guard FoRxo log | Welex | focused resistivity | resistivity | ||||||||

DGL | dual guard log | Welex | focused resistivity | resistivity | ||||||||

DHD | dual dipmeter | Schlumberger | dip meter | dip | ||||||||

DHL | deviated hole logging system | Schlumberger | borehole deviation | deviation | ||||||||

DIFL | dual induction focused log | Dresser atlas | induction | |||||||||

DIFL | dual induction focused log | Welex | focused conductivity | conductivity | ||||||||

DIGL | dual induction guard | Welex | focused conductivity | conductivity | ||||||||

DIL | dual induction resistivity | Schlumberger | true formation resistivity, invasion profiles, correlation, quicklook HC detection, depth control | induction | 0.2 | 2000 | ohm/m | |||||

DIL | dual induction log | Welex | focused conductivity | conductivity | ||||||||

DIP | resistivity dip log | Welex | dip meter | dip | ||||||||

DIRSID | directional survey | Dresser Atlas | directional survey | directional survey | ||||||||

DISN | dual induction short normal log | Welex | focused conductivity | conductivity | ||||||||

DL | density log | Gearhart | density | density | ||||||||

DLL | dual laterolog | Dresser Atlas | focused resistivity | resistivity | ||||||||

DLL | dual laterolog | Gearhart | focused resistivity | resistivity | ||||||||

DLL | dual laterolog | Schlumberger | focused resistivity | resistivity | ||||||||

DNL | dual spaced neutron n-t | BPB Instruments | neutron | neutron | ||||||||

DNLL | dual detector neutron lifetime log | Dresser Atlas | neutron | neutron | ||||||||

DNP | dual compensated neutron n-t and n-e | Schlumberger | neutron | neutron | ||||||||

DPHI | density porosity | ? | Schlumberger | density porosity | density porosity | |||||||

DPO | LDS density porosity | Schlumberger | lithodensity density porosity | density po | -0.15 | v/v | ||||||

DPT | deep propagation log | Schlumberger | dielectric permittivity | resistivity | ||||||||

DRHO | delta rho | Schlumberger | change in density | density | -2500 | 25000 | g/c3 | |||||

DSI | shear, compressional, and stoneley waves | Schlumberger | amplitude variation with AVO calibration, shear seismic correlation, wellbore stability, fracture height estimate, mobility, fracture estimation | transit time | ||||||||

DSI | dual spaced induction | BPB | conductivity | |||||||||

DSL | digital sonic log | Schlumberger | acoustic transit time | porosity | ||||||||

DSN | dual spaced neutron log n-t | Welex | neutron | neutron | ||||||||

DT | delta transit time | generic | transit time | porosity | 340 | 40 | us/f | |||||

DTCO | delta transit time compressional | porosity | 340 | 40 | us/f | |||||||

DTL | differential temperature log | Gearhart | temperature | temperature | ||||||||

DTSM | delta transit time shear measurement | porosity | 440 | 40 | us/f | |||||||

DTST | delta transit time stoneley wave | porosity | ||||||||||

EL | electric log | dresser atlas, schlumberger, welex | resistivity | |||||||||

ELREC | electric log salt dome profile | Gearhart | resistivity | |||||||||

EMC | micro contact caliper | Birdwell | nonfocused microresistivity perm indicator, microlog | resistivity | ||||||||

ENP | epithermal neutron log n-e | BPB Instruments | neutron | neutron | ||||||||

EPT | electromagnetic propagation log | Schlumberger | investigates flushed zone; pad; 1.1 Ghz | dielectric permittivity | resistivity | |||||||

ES | electric log | Birdwell | short normal, long normal, lateral and sp curves | lithology | ||||||||

FCL | FoRxo caliper log | Welex | focused microlaterolog | resistivity | ||||||||

FDC | formation density log compensated | Schlumberger | density | density | ||||||||

FDL | formation density l | Birdwell | density | density | ||||||||

FDL | fracture detection log | Gearhart | dip meter | fractures | ||||||||

FE | focused electric | BPB Instruments | focused resistivity | resistivity | ||||||||

FED | dipmeter | Gearhart | dip meter | dip | ||||||||

FF | fracture finder | Welex | acoustic amplitude, fractures | amplitude | ||||||||

FIL | Fracture identification log | Schlumberger | dip meter | fractures | ||||||||

FIT | formation interval tester | Schlumberger | formation fluid and pressure | formation | ||||||||

FMT | formation multitester | Dresser Atlas | formation fluid and pressure | formation | ||||||||

FPL | fracture profile log | Welex | dip meter | fractures | ||||||||

FRAC | fracture analysis | Dresser Atlas | fracture analysis | fractures | ||||||||

FWAL | full wave acoustic log | Welex | acoustic wave train | porosity | ||||||||

GCL | Continuous guidance log | Schlumberger | borehole deviation | deviation | ||||||||

GDS | guard log | Birdwell | focused resistivity | resistivity | ||||||||

GFL | Guard-FoRxo | Welex | focused resistivity | resistivity | ||||||||

GL | guard log | Gearhart | focused resistivity | resistivity | ||||||||

GL | guard log | Welex | focused resistivity | resistivity | ||||||||

GR | gamma ray | all | radioactivity | gamma | 0 | 150 | API units | |||||

GRB | gamma ray backup | radioactivity | gamma | 100 | 200 | API units | ||||||

GST | gamma spectrometry log | Schlumberger | gamma, spectral | gamma | 0 | 250 | API units | |||||

GST | gamma spectrometry log | Schlumberger | spectral gamma ray | gamma | 0 | 250 | API units | |||||

HCGR | hostile natural gamma ray sonde computed ga | Schlumberger | gamma ray | gamma | 0 | 150 | API units | |||||

HDT-E | high resolution digital dipmeter | Schlumberger | dip meter | dip | ||||||||

HLDT | hostile environment lithodensity tool | Schlumberger | density, lithology, porosity, caliper | density porosity | ||||||||

HRC | hard rock coring tool | Gearhart | sidewall cores | cores | ||||||||

HRD | high resolution density | BPB Instruments | density | density | ||||||||

HRDIP | Hi Resolution 4 arm diplog | Dresser Atlas | dip meter | dip | ||||||||

HRT | high resolution thermometer | Schlumberger | temperature | temperature | ||||||||

HSGR | hostile natural gamma ray sonde standard gamma ray | gamma ray | gamma | 0 | 150 | API units | ||||||

IDER | enhanced phasor processed deep resistivity | Schlumberger | resistivity | resistivity | 0.2 | 20 | ohm/m | |||||

IEL | induction electric | Gearhart | focused conductivity | conductivity | ||||||||

IEL | induction electric log | Welex | focused conductivity | conductivity | ||||||||

IES | induction electric | Birdwell | conductivity | |||||||||

IL | induction log | Gearhart, Schlumberger | conductivity | |||||||||

ILD | deep induction standard processed resistivity | Schlumberger | conductivity | conductivit | 0.2 | 2000 | ohm/m | |||||

ILM | medim induction standard processed resistivity | Schlumberger | conductivity | conductivit | 0.2 | 2000 | ohm/m | |||||

IMER | Enhanced phasor processed medium resistivity | Schlumberger | conductivity | conductivit | 0.2 | 20 | ohm/m | |||||

IS | induction | Birdwell | ||||||||||

ISF | ISF induction log | Schlumberger | focused conductivity | conductivity | ||||||||

L | laterolog | Schlumberger | focused resistivity | resistivity | ||||||||

LCRA | lithology complex reservoir analysis | Dresser Atlas | reservoir analysis | reservoir | ||||||||

LDS | lithodensity | Schlumberger | density | density | ||||||||

LDT | litho density compensated | Schlumberger | density | density | ||||||||

LDT-CNL | lithodensity/compensated neutron log | |||||||||||

LL | laterolog | Dresser Atlas | linear scale | focused resistivity | resistivity | linear | linear | |||||

LLD | laterolog deep | log scale / part of dual laterolog | resistivity | resistivity | 0.2 | 2000 | ohm/m | |||||

LLS | laterolog shallow | log scale / part of dual laterolog | resistivity | resistivity | 0.2 | 2000 | ohm/m | |||||

LN | LONG NORMAL 64" | Schlumberger | ELEC RESISTIVITY | resistivity | ||||||||

LSAL | long spaced acoustic velocity log | Welex | acoustic transit time | porosity | ||||||||

LSBHC | long spaced BHC acoutilog | Dresser Atlas | acoustic transit time | transit time | ||||||||

LSD | long spacing density | BPB Instruments | density | density | ||||||||

LSS | long spaced sonic | Gearhart | acoustic transit time | porosity | ||||||||

LSS | long spaced sonic | Schlumberger | acoustic transit time | porosity | ||||||||

MCS | multichannel sonic | BPB Instruments | acoustic transit time | porosity | ||||||||

MEL | micro electric log | Gearhart | nonfocused microresistivity perm indicator, microlog | resistivity | ||||||||

MIS | magnetic inclinometer survey | Birdwell | borehole deviation | deviation | ||||||||

ML | minilog | Dresser Atlas | nonfocused microresistivity perm indicator, microlog | resistivity | ||||||||

ML | microlog | Schlumberger | nonfocused microresistivity perm indicator, microlog | resistivity | ||||||||

MLL | micro resistivity | BPB Instruments | focused microlaterolog | resistivity | ||||||||

MLL | micro laterolog | Gearhart | focused microlaterolog | resistivity | ||||||||

MLL | microlaterolog | Schlumberger | focused microlaterolog | resistivity | ||||||||

MRIL | magnetic resonance imaging log | NUMAR | nuclear magnetic resonance, porosity | porosity | ||||||||

MSF | microspherically focused log | Gearhart | focused microlaterolog | resistivity | ||||||||

MSFL | MicroSFL resistivity | Schlumberger | see AO / often part of dual laterlog combination/ log scale | resistivity | ||||||||

MSFL | Microresistivity | resistivity of flushed zone, porous & permeable zones, movable HC, caliper | resistivity | 0.2 | 2000 | ohm/m | ||||||

MSFL | micro sfl | Schlumberger | focused microlaterolog | resistivity | ohm/m | |||||||

MSG | microseismogram | Welex | acoustic wave train | seismic | ||||||||

MST | multiset tester | Welex | formation fluid and pressure | formation | ||||||||

NBC | neutron borehole compensated n-t | Birdwell | neutron | neutron | ||||||||

NGS | natural gamma ray spectrometry log | Schlumberger | thorium, potassium, uranium curves | gamma | 0 | 250 | API units | |||||

NGS | natural gamma ray spectrometry log | Schlumberger | gamma, spectral | gamma | 0 | 250 | API units | |||||

NGS | natural gamma ray spectrometry log | Schlumberger | spectral gamma ray | gamma | 0 | 250 | API units | |||||

NL | neutron log n-gamma and n-e, n-t | Birdwell | neutron | neutron | ||||||||

NL | neutron log n-gamma | Schlumberger | neutron | neutron | ||||||||

NL | neutron log n-gamma and n-t | Welex | neutron | neutron | ||||||||

NLL | neutron lifetime log | Dresser Atlas | neutron | neutron | ||||||||

NML | nuclear magnetism log | Dresser Atlas | free fluid | fluid | ||||||||

NML | nuclear magnetism log | Schlumberger | free fluid | fluid | ||||||||

NMR | nuclear magnetic resonance | Schlumberger | nuclear magnetic resonance, porosity | porosity | ||||||||

NN | neutron n-t | BPB Instruments | neutron | neutron | ||||||||

NPHI | neutron porosity | hydrogen content, gas detection, lithology did, clay analysis, porosity analysis | neutron | 0.6 | 0 | v/v | ||||||

NPOR | neuton porosity | ? | neutron | neutron | ||||||||

NPLT | nuclear porosity lithology tool | Schlumberger | combined gamma density, neutron porosity, and gr spectrometry | gamma | ||||||||

PCD | powered caliper device | Schlumberger | borehole size | caliper | ||||||||

PE | photoelectric | generic | photoelectric | lithology | ||||||||

PEF | photoelectric effect | Schlumberger | photoelectric | lithology | 0 | 10 | ||||||

PEFL | photoelectric effect long | Schlumberger | photoelectric | lithology | 0 | 10 | ||||||

PEFS | photoelectric effect short | Schlumberger | photoelectric | lithology | 0 | 10 | ||||||

PHIE | Porosity | Schlumberger | see AO | Porosity | porosity | 0.02 | 200 | ohm/m | ||||

PHILC | accelerator porosity sonde epithermal porosity l | Schlumberger | same as APS EPI… | porosity | 45 | -15 | pu | |||||

PHIN | neutron porosity | generic | neutron | porosity | 45 | -15 | pu | |||||

PL | pressure log | Birdwell | pressure | pressure | ||||||||

PL | proximity log | generic | resistivity | resistivity | ||||||||

PML | proximity minilog | Dresser Atlas | focused microlaterolog | resistivity | ||||||||

PNL | pulse neutron log | generic | used in cased hole | indirect chlorine concentration | hydrocarbon detection | |||||||

POTA | potassium curve | Schlumberger | potassium curve | gamma | 0 | 0.1 | ||||||

PTL | precision temperature log | Welex | temperature | temperature | ||||||||

RFT | repeat formation tester | Schlumberger | formation fluid and pressure | formation | ||||||||

RHOB | bulk density | Schlumberger | bulk density | density | 2 | 3 | g/c3 | |||||

RMA | radioactive mineral analysis | Dresser Atlas | reservoir analysis | reservoir | ||||||||

RX0 | Microresistivity | generic | resistivity of flushed zone | resistivity | 0.2 | 2000 | ohm/m | |||||

SAND | Prolog Sandstone Analysis | Dresser Atlas | sandstone analysis | sandstone | ||||||||

SCCL | shale compensated chlorine log | NL McCullough | spectral gamma ray | gamma | 0 | 250 | API units | |||||

SDA | stratadip analysis | Dresser Atlas | dip meter | dip | ||||||||

SDL | spectral density log | density | density | |||||||||

SDS | slimline dipmeter survey | BPB Instruments | dip meter | dip | ||||||||

SF | spherically focused log | Gearhart | focused resistivity | resistivity | ||||||||

SFAL | sonic formation amplitude log | Gearhart | acoustic amplitude fractures | amplitude | ||||||||

SFL | Spherically focused log | Schlumberger | dual induction SFL array resistivity at 3 depths | resistivity | resistivity | 0.2 | 20 | ohm/m | ||||

SFL | spherically focused log | Schlumberger | focused resistivity | resistivity | ||||||||

SFLU | spherically focused log, unaveraged | Schlumberger | resistivity | resistivity | 0.2 | 20 | ohm/m | |||||

SFT | select formation tester | Gearhart | formation fluid and pressure | formation | ||||||||

SFT | sequential formation tester | Welex | formation fluid and pressure | formation | ||||||||

SGR | spectroscopy gamma ray | Schlumberger | gamma | 0 | 250 | API units | ||||||

SGR | spectral gamma ray | Gearhart | gamma, spectral | gamma | 0 | 250 | API units | |||||

SGR | spectral gamma ray | Gearhart | spectral gamma ray | gamma | 0 | 250 | API units | |||||

SL-A | amplitude log | Schlumberger | acoustic amplitude | amplitude | ||||||||

SL-WFP | wave train display | Schlumberger | acoustic wave train | seismic | ||||||||

SN | short normal resistivity | generic | shallow formation resistivity | resistivity | 0 | 50 | ohm/m | |||||

SNL | sidewall neutron log n-e | Gearhart | neutron | neutron | ||||||||

SNP | sidewall neutron log n-e | Schlumberger | neutron | neutron | ||||||||

SP | Spontaneous potential | Schlumberger | detect permeable beds, bedding boundaries, formation water resistivity, and volume of shale in permeable beds | reservoir rock identification, formation water resistivity | lithology | -160 | 40 | mV | ||||

SPHI | sonic derived porosity curve | generic | Porosity | porosity | 0.4 | 0 | v/v | |||||

SPL | spectral gamma ray | Spectralog | gamma, spectral | gamma | 0 | 250 | API units | |||||

SS | seismic spectrum | Gearhart | acoustic wave train | seismic | ||||||||

SS | synthetic seismogram | Dresser Atlas | seismic velocity | seismic | ||||||||

SWA | sidewall acoustic log | Dresser Atlas | acoustic transit time | transit time | ||||||||

SWC | sidewall coring | Welex | sidewall cores | cores | ||||||||

SWD | core gun | Birdwell | sidewall cores | cores | ||||||||

SWN | sidewall epithermal neutron n-e | Dresser Atlas | neutron | neutron | ||||||||

SWN | sidewall neutron log n-e | Welex | neutron | neutron | ||||||||

TCR | quantitative tracer survey | CRC Wireline | production | |||||||||

TDT | thermal decay time log | Schlumberger | cased hole log detects HC buildups behind pipe | neutron | neutron | |||||||

TENS | tension | Schlumberger | drill string tension | tension | 12000 | 2000 | lbf | |||||

THOR | thorium curve | Schlumberger | thorium curve | gamma | 0 | 40 | ppm | |||||

TL | temperature log | Birdwell | temperature | temperature | ||||||||

TL | temperature log | Gearhart | temperature | temperature | ||||||||

TLD | differential temperature log | Birdwell | temperature | temperature | ||||||||

TMD | thermal multigate decay log | Welex | neutron | neutron | ||||||||

TRF | well treatment profile | Birdwell | production | |||||||||

TRP | radioactive tracer log | Birdwell | production | |||||||||

TS | temperature/differential temperature | BPB Instruments | temperature | temperature | ||||||||

TVD | true vertical depth | Dresser Atlas | True vertical depth | depth | ||||||||

ULSEL | electric log salt dome profile | resistivity | ||||||||||

URAN | uranium curve | Schlumberger | uranium curve | gamma | -10 | 30 | ppm | |||||

V3D | 3-D velocity log | Birdwell | acoustic wave train | seismic | ||||||||

VDL | variable density log | Dresser Atlas | acoustic wave train | seismic | ||||||||

VDL | variable density log | Schlumberger | acoustic wave train | seismic | ||||||||

VSP | vertical seismic profile | Dresser Atlas | seismic velocity | seismic | ||||||||

WSR | well seismic record | Schlumberger | acoustics seismic | seismic | ||||||||

WSS | wellbore sibilation survey | Birdwell | noise log | production | ||||||||

XYC | x-y caliper | Gearhart | borehole size | caliper |