### Geophysical Curve Abbreviations

Below is a list of some common abbreviations for geophysical curves.

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CurveDefinition3DV 3-Dimensional Velocity ACU Acoustic Log AF Array Induction Four Foot AFCO Array Induction Four Foot AMF Array Induction Mud Resistivity AO Array Induction One Foot AT Array Induction Two Foot ATCO90 Conductivity AUD Noise Log, Audio, Experimental Noise Log AVD Amplitude-Variable Density Log BHI Borehole Imager, Ultrasonic BH Imager BHV Velocity BMK_DYN Bulk modulus BS Bit size BT Borehole televiewer C44_TIV Elastic Constant C44 C66_TIV Elastic Constant C66 CAL Caliper CALI Caliper CALX Caliper CBL Cement Bond, Cement Curve, Cement Quality, Cement Top, Sonic Cement Bond, Cement Map, Pipe Bond CCL Casing Collar Locator CGR GR from Thorium and Potassium CHL Cased hole neutron CMR Combinable magnetic resonance CNC Neutron Porosity CNL Compensated Neutron Log, Dual spaced neutron CO Conductivity COR Correlation Log CORE Sidewall Core CP Computer Process, Cyberlook, Complex lithology, Hydrocarbon Identification, Laserlog, Complot, Water Saturation D Density, Spectral density, Slim hole density DC Depth Correlation Log DEVI Deviation DIL Dual induction DIR Deviation survey, Borehole directional survey, True vertical depth DLL Dual laterlog DM Dip Meter, Continuous dipmeter, High resolution dipmeter DPH8 Density Porosity DPHI Porosity from density DPHZ Standard Resolution Density Porosity DRHO Density Correction DT Delta-t DT_Comp Delta-t compressional DTCO Delta-t compressional DTS_Fast Delta-t FAST shear DTS_Slow Delta-t SLOW shear DTSM Delta-t shear ECGR Gamma Ray ECS Elemental Capture Spectroscopy EL Electric Log ELANPlus Volumes Constituent volumes EMT Electromagnetic propagation ENP Epithermal Neutron Porosity EP Elastic Properties EPL Engineered Production Logging F Fracture, Fracture ID FANG_PPC Friction angle FDC Formation Density Log (D&Cal), Density, Porosity, Litho-Log FMI Formation Micro-Imaging FMS Formation microscanner FT Formation Test, Repeat formation tester GD Guard, MicroGuard GND Gamma Ray-Neutron,Density GR Gamma Ray HCAL Caliper HDRA Density Standoff Correction HMIN Micro-Inverse Resistivity HMNO Micro-Normal Resistivity HTNP Thermal Neutron Porosity ISHE Initial shear strength KTH GR minus Uranium M0R2 Shallow Induction M0R6 Deep Induction M2 2 Foot Matched Resolution Resistivity MP Mechanical properties, MECPRO MUD Mud Log, sample log N Neutron NGT Gamma Ray-Spectroscopy, Natural gamma ray spectrometry NL Not Logged NPH Neutron Porosity NPOR Neutron Porosity P Porosity PE Photoelectric, Photo density, Lithology, LithoDensity PEF Photoelectric Effect PEF8 Photoelectric Effect PEFZ Photoelectric Effect PF Perforating Depth Control, Perforating PORZC Z-Density Porosity PR_Fast Poisson's Ration from fast dipole PR_Horiz Horizontal Poisson's ratio PR_Iso Poisson's Ratio from isotropic model PR_Slow Poisson's Ration from slow dipole PR_Vert Vertical Poisson's ratio PRL Propagated Resistivity Log RES Resistivity, Microresistivity RHOB Neutron Density ROP Rate of Penetration RP Rate of Penetration, Drill Time, Drill Rate SD Sample Description/Formation Description SFA_Fast Fast shear sonic frequency analysis projection SFA_Slow Slow shear sonic frequency analysis projection SFL Spherically Focused Log, MicroSFL SGR Spectroscopy GR SMG_DYN Shear bulk modulus SNP Sidewall Neutron Porosity SON Sonic, Sonic porosity, Borehole compensated sonic, waveforms, corrected amplitude SP Spontaneous Potential SPH Sonic Porosity SPHI Sonic Porosity SPR_Fast Fast shear sonic coherence projection SPR_Slow Slow shear sonic coherence projection SPS Spinner survey SS Seismic Spectrum SYN Synthetic seismogram TBIT Array Induction TCMR Magnetic Resonance Porosity TDT Thermal Neutron, Decay Time TEMP Temperature, Differential temperature, Calibrated temperature, Delta Temperature TEN Cable Tension TENS Cable Tension TLC Drill Pipe Conveyed TNPH Thermal Neutron Porosity TR Tracer, Isotope tracer TT Travel time TVD True vertical depth TXSG Minimum horizontal stress gradient TXSG_TIV TIV minimum horizontal stress gradient UCS_CDE Uniaxial compressive strength USGD Ultra Sonic Gas Detector, Gas Dectector, Continuous Total Gas VPVS_Fast Compressional/Shear Ration from the fast dipole VPVS_Slow Compressional/Shear Ration from the slow dipole VSP Vertical seismic profile WBS Well Bore Sibilation WSM Well seismic monitor YME_Horiz Horizontal Young's modulus YME_Iso Young's modulus from isotropic model YME_Vert Vertical Young's modulus Z-CORR Z Correction

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