GeolOil - List of standard LAS curve Mnemonics dictionary

A Curve Mnemonic is the name of the curve in a LAS file. It must be a short single word with two or more letters, numbers, and optional underscores. In GeolOil, the mnemonics must satisfy these conditions:

The mnemonic must start with a letter.
No white, blank spaces, tabs, or any special characters are allowed. However, underscore characters "_" are allowed.
The mnemonics can freely combine uppercase and lowercase letters. However, prefer uppercase letters for maximum compatibility between different software vendors. Detection of mnemonics are case insensitive.
Non unique mnemonics are allowed in the same LAS file. Different LAS curves can have the same mnemonic —unfortunately it is quite common and confusing—. However, it is a bad practice to use the same mnemonic for different curves.

It is virtually impossible to provide a complete collection of "standard" curve mnemonics. They can be counted by hundreds or even thousands, and growing. Each logging company assigns its own mnemonics, and each interpreter usually assigns its own mnemonics, with versions and initials. It is normal.

An Alias is a short meaningful word —with the same rules as the mnemonics— intended to simplify the broad diversity of mnemonics curves. For instance, several LAS files can easily have many curve mnemonics for Gamma Ray, like GR, GR1, GAMMA, GR3, all of the them with similar properties and different qualities and resolutions. An alias simply called GammaRay could be a candidate for such collection of mnemonics.

The following list is our recommended collection of aliases for typical mnemonics. It is far from exhaustive, but usually gives an idea of the meaning of commonly encountered curves:

Table of standard LAS Curve Mnemonics dictionary

`GeolOil Alias`	`Descrip.`	`Mnemonic equivalents`
`BitSize`	`Size of the drilling bit`	`BIT, BITS, BS, BitSize`
`Caliper`	`Size of the Caliper`	CALIPER, CALIP, CALI, CAL, DCAL, ACAL, CALA, CALD, CALE, CALH, CALL, CALM, CALML, CALN, CALP, CALS, CALT, CALX, CALXH, CALXZ, CALY, CALYH, CALYHD, CALYM, CALYQH, CALYZ, CALZ, CANC, CANN, CAPD, CAX, CAY, CLDC, CLDM, CLL0, CLMR, CLMS, CLRM, CLS2, CLTC, CLXC, CLXF, CLYC, MCAL, CALXQH, CLCM, CR1, CR2, CS1M, CS2M, CS3M, CS4M, CS5M, CS6M0, HCA1, HCAL, HCALI, HCALX, HCALY, XCAL, YCAL, CABX, CABY, CACN, CADF, CADP, CAMR, CAXR, CAYR, DCCP, MLTC, C1, C13, C13A, C13H, C24A, C24, C24H, C24I, C24L, C24M, C24P, C24Z, CA, CA1, CA2, CADE, CAL1, CAL2, CAL3, CALXM, CALXQ8, CALXGH, CALYQ8, CLCD, CLLO, CQLI, HD1, HD2, HD3, HDAR, HDIA, HDMI, HDMN, HDMX, HLCA, LCAL, SA, TAC2, C3, HHCA, MBTC, TACC, DZAL
`BoreHTemp`	`Borehole Temper.`	`TEMPERATURE, TEMPERAT, TEMPER, TEMP, TEXD, TEXF, BHT, BHTF, TEPP, TEXL, TEXM, TEXN, TEXP, GTEM, BoreHTemp`
`SP`	`Spont. Potential`	`SP, IDSP, SPR, SPL, SPDL, SPDHP, SPDH, SPDF, SPD, SPCG, SPC, SP0, SP1, SPBR, SPBRDH, IASP, CGSP, DLSP, SPLL`
`GR`	`Total Gamma Ray`	GR, CGGR, CGR, DLGR, ECGR, EHGR, HRGR, GAM, GAMD, GAMM, GAMMA, GAMMARAY, GAMNAT, GCGR, GCPS, GRA, GRAY, GRC, GRCD, GRCF, GRD, GRDE, GRDI, GRG, GRGC, GRGM, GRGM, GRGS, GRH, GRHD, GRHDIL, GRI, GRIN, GRLL, GRM, GRML, GRN, GRNC, GRNP, GRP, GRPD, GRPND, GRQH, GRS, GRSD, GRSG, GRSL, GRT, GRTO, GRX, GRZ, GSGR, HGR, HSGR, LGR, P01LGR, P02LGR, P03LGR, P06LGR, PGR, SGR, SGRA, SGRB, SGRC, RGR, HCGR, GAMMA_RAY, GAMS, GRCR, GRHR, GRQA, GRR, GRV, MCGR, GRCN, GRDP, GRCC, GRCG, GRCL, GRCM, GRCP, GRD4, GRFB, GRMN, GRNB, GRPO, GRPR, GRRF, TGR, TOTGR, GRTOR, GR1, GR2, GRCO, GRDA, GRZD, HHGR, MGR, SGRD
`GrUr`	`Uranium Gamma Ray`	`URANIUM, URAN, URA, GRU, GRUR, HURA, U, UCPS, UZ`
`GrTho`	`Thorium Gamma Ray`	`THORIUM, THOR, THO, GRTH, TH, HTHO, TCPS`
`GrPot`	`Potassium Gamma Ray`	`POTASSIUM, POT, GRPO, GRPOT, GRPOTA, POTA, HPOT, KCPS`
`PEF`	`Photo Electric Factor`	`PE, PEF, PEFZ, PDPE, PEDF, PEDN, HPEDN, HPEH8, PE2, PE2QH, PEF8, PEFA, PEFI, PEFL, LPE, PEFS`
`RHOB`	`Bulk Density`	`RHOB, RHOZ, DEN, DENB, DENC, DENCDL, HRHO, HRHOB, ZDEN, ZDENS, ZDNCS, ZDNC, HDEN, DENF, DENN`
`DensCorr`	`Bulk Density Correction`	`DCOR, DCORR, DC, DECR, DRH, ZCOR, ZCORR, ZCOR2, ZCOR2QH, ZCORQH, HHDR, DensCorr`
`PhiE`	`Effective Porosity`	`PHIE, PIGN, POROE, DPHIE, NPHIE, SPHIE`
`PhiT`	`Total Porosity`	`PHIT, POROT, DPHI, SPHI, XPOR, DPOR, NPOR, SPOR`
`NeutPhi`	`Neutron Porosity`	`CN, PHIN, CNC, CNS, HHNPO, HNPHI, NPHI, NPOR, CNCC, CNCD, CNCF, NPRL, TNPH, TPHC, XPOR, NEUT, NeutPor`
`NPorLim`	`Limestone Neutron Porosity (Calcite calibrated)`	`NPRL, NPORL, NPHIL, HNPOL, HNPO_LS, HNPO_LIM, NPOR_L, NPOR_LS, NPOR_LIM, HTNP_LIM, HNTP_LS, TNPH_LIM, NPorLim`
`NPorDol`	`Dolomite Neutron Porosity (Dolomite calibrated)`	`NPRD, NPORD, NPHID, HNPOD, HNPO_DL, HNPO_DOL, NPOR_L, NPOR_DL, NPOR_DOL, HTNP_DOL, HNTP_DL, TNPH_LIM, HNTP_DOL, NPorDol`
`NPorSand`	`Sandstone Neutron Porosity (Quartz calibrated)`	`NPRS, NPORS, NPHIS, HNPOS, HNPO_SS, NPOR_S, NPOR_SS, HNTP_SS, TNPH_SAN, HNTP_SAN, HNPO_SAN, NPOR_SAN, NPorSand`
`DtComp`	`Compress. Delta Time (Slowness)`	`DT, DTC, DTCO, DTCOMP, DELTAT, SLOW, SLOWNESS, TT, TIME, TIM, ITT, DTCQI, DTCR, DTCREP, DTCS, DTCSG, DTCU, DTCV0, DTCX, DTL, DTP, DTR, DTTP, DTU, DTUM, CTIME, COTIME, COMT, DT1A, DT1B, DT34, DT35, DT3A, DT3B, DT45, DT46, DT56, DTC1, DTC2, DTC3, DTCM, AC, ACCO, DELT, ACL, ACN, DT24, DT24QI, DT24SQA, DT41, DT4P, DT5, DTMN, DTMX, DTSC, TTC, AC1, MSTT, DtComp`
`DtShear`	`Shear Delta Time`	`DTS, DTSH, DTSM, DTSC, DTSD, DTSDF, DTSQI, DTTS, DTSHEAR, DELTAS, TTS, TIMES, TIMS, ITTS, STT, DT4S, DTSF, DTSS, SHSL, DtShear`
`Rxo`	`Flushed Zone Resistivity`	`RXO, RXOZ, MSFL, MCFL, SFLCC, MGL`
`Rt`	`True Deep Resistivity`	`RT, RTAO, RT1DI, RT90, ILD, IDER, IDFL, IDID, IDPH, IDVR, ILS, RILD, RIPD, RILV, RD, DEEP, AE90, AF90, AHFRT, AHO90, AHORT, AHRT, AHT90, AHTRT, AIRD, AO90, AORT, AS90, ASF90, ASFRT, ASRT, AST90, ASTRT, AT90, ATRT, DSER, HILD, HLLD, HRLD, LLD, LLDC, VRSD, SEDC, SEDA, RLLD, RES, RESD, REID, DLL, DDLL, HDRS, R850, MINV, ML`
`SWe`	`Effective Water Saturation`	`SW, SWE, SWM, SWWW, WAT_SAT`
`SWt`	`Total Water Saturation`	`SWT, SWTOT, SWTOTAL, SW_T, SW_TOT, SW_TOTAL`
`SWirr`	`Irreduc. Water Saturation`	`SWirr, SWir, SWI, SWC`
`Vshale`	`Volume of Shale`	`VSH, Vshale`
`Vclay`	`Volume of Clay`	`Vclay, Vcla, Vcl`
`KhMax`	`Maximum Horizontal Permeab.`	`KHMAX, KH, KMAX, KHMA, KHOR, PERM, HPERM, PERMH, MAX_PERM, KhorMax`
`KhMin`	`Minimum Horizontal Permeab.`	`KHMIN, KMIN, KHMI, MINPERM, MIN_PERM, KHOR_MIN, KhorMin`
`Kvert`	`Vertical Permeab.`	`KVERT, KVER, KVE, KV, VPERM, PERMV, VERTK, VERK`

GeolOil default LAS curve Mnemonics dictionary

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Since 2012

GeolOil - List of standard LAS curve Mnemonics dictionary

Table of standard LAS Curve Mnemonics dictionary