Well Log Code Code Definition
AUD Noise Log, Audio, Experimental Noise Log
BHV Velocity
BIL Borehole Image Log
BPP Borehole Profile Plot
BT Borehole televiewer
CAL Caliper
CBL Cement Bond, Cement Curve, Cement Quality
CCL Casing collar locator
CHL Cased hole neutron
CIL Casing inspection log
CP Computer Process, Cyberlook, Complex lithology, Hydrocarbon Identification, Laserlog
CPTVD Computer Processed (TVD)
D Density, Spectral density, Slim hole density
DC Depth Correlation Log
DIR Deviation survey, Borehole directional survey
DLL Dual laterlog
DM Dip Meter, Continuous dipmeter, High resolution dipmeter
DN Density,Neutron
DNM Density, Neutron, Micro(Mini)Log
DNMTVD Density, Neutron, Micro(Mini)log (TVD)
DTVD Density (TVD)
EL Electric Log
EMT Electromagnetic propagation
FIL Fracture Identification Log
FMS Formation Micro Scanner
FT Formation Test, Repeat formation tester
GR Gamma Ray, Radioactivity
GRTVD Gamma Ray (TVD)
I Induction Resistivity
IDN Induction, Density, Neutron
IDNM Induction, Density, Neutron, Microlog/Minilog
IDNMTVD Induction, Den, Neu, Micro (Mini) log TVD
IDNS Induction, Den, Neutron, Sonic
IDNSM Induction, Density, Neutron, Sonic, Micro(Mini)og
IDNSTVD Induction, Den, Neutron, Sonic(TVD)
IDNTVD Induction, Density, Neutron (TVD)
IDTVD Induction, Density (TVD)
IM Induction, Micro(Mini)log
IMTVD Induction, Micro(Mini)log (TVD)
IS Induction, Sonic/Acoustic
ISM Induction, Sonic, Microlog
ISMTVD Induction, Sonic, Microlog(TVD)
ISN Induction, Sonic, Neutron
ISNTVD Induction, Sonic, Neutron (TVD)
ISTVD Induction, Sonic (TVD)
ITVD Induction (TVD)
LL Laterlog
LLDNM Laterolog, Density, Neutron, Microlog
ML Microlog, Minilog
MLL Microlaterolog
MLTVD Micro (Mini) log (TVD)
MR Magnetic Resonance Log
MUD Mud Log, sample log
N Neutron
NL Not Logged
NTVD Neutron (TVD)
PF Perforating Depth Control, Perforating
PKR Packer setting record
PPL Pore Pressure Log
PRL Propagated Resistivity Log
PRLTVD Propagated Resistivity Log-True Vert Depth
PRX Pressure Express
RES Resistivity
ROP Rate of Penetration
ROPTVD Rate of penetration (TVD)
RST Reservoir Saturation Tool
RTS Radioactive Tracer Survey
S Sonic, Sonic porosity, Borehole compensated sonic
SFL Spherically Focused Log
SL Spectroscopy Log
SNP Sidewall Neutron Porosity
SNPTVD Sidewall Neutron (TVD)
SPS Spinner survey
STVD Sonic (TVD)
SWC Sidewall Core Report
T Temperature, Differential temperature
TDT Thermal Neutron Decay Time
TR Tracer, Isotope tracer
USGD Ultra Sonic Gas Detector
VSP Vertical seismic profile
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