Schlumberger

Mnemonics, Software product, SONFRAC


CodeSONFRAC
NameSonic Fracture
DisciplineGeology
TypeAPPLICATION
DescriptionFracture Evaluation from Sonic Waveforms

Related channels
ChannelDescription
AMUD Attenuation in Mud
BS Bit Size
C1 Caliper 1
C2 Caliper 2
C3 Double R1 Radius (HDT)
C4 Double R4 Radius (HDT)
CAL1 Caliper 1
CAL2 Caliper 2
CALI Caliper
CALS Micro Resistivity Caliper
DIP Dip Angle
DT1R Delta-T Shear, Receiver Array - Lower Dipole
DT1T Delta-T Shear, Transmitter Array - Lower Dipole
DT2R Delta-T Shear, Receiver Array - Upper Dipole
DT2T Delta-T Shear, Transmitter Array - Upper Dipole
DT3R Delta-T Stoneley, Receiver Array - Monopole Stoneley
DT3T Delta-T Stoneley, Transmitter Array - Monopole Stoneley
DT5 Delta-T Compressional, DDBHC - FMD
DTCO Delta-T Compressional
DTRP Delta-T Compressional, Receiver Array - Monopole P&S
DTRS Delta-T Shear, Receiver Array - Monopole P&S
DTSM Delta-T Shear
DTST Delta-T Stoneley - Monopole Stoneley
DTTP Delta-T Compressional, Transmitter Array - Monopole P&S
DTTS Delta-T Shear, Transmitter Array - Monopole P&S
EVENTD Event Flag for Downgoing Reflector
EVENTU Event Flag for Upgoing Reflector
FCND_AHF Fracture Conductivity from Apparent Horizontal Fracture Model
FCND_DF Fracture Conductivity from Dipping Fracture Model
FCND_RAW_AHF Fracture Conductivity from Apparent Horizontal Fracture Model without Correction
FCND_RAW_DF Fracture Conductivity from Dipping Fracture Model without Correction
FERR_AHF Error of Data Fit to Apparent Horizontal Fracture Model
FERR_DF Error of Data Fit to Dipping Fracture Model
FPERM_AHF Fracture Permeability from Apparent Horizontal Fracture Model
FPERM_DF Fracture Permeability from Dipping Fracture Model
FPERM_RAW_AHF Fracture Permeability from Apparent Horizontal Fracture Model without Correction
FPERM_RAW_DF Fracture Permeability from Dipping Fracture Model without Correction
FVDA Apparent Fracture Density: Number of fractures per feet within a given window height
FVDC Corrected Fracture Density: Apparent Fracture Density (FVDA) corrected for the orientation bias (angle between fracture plane and borehole axis)
FWID_AHF Fracture Width from Apparent Horizontal Fracture Model
FWID_DF Fracture Width from Dipping Fracture Model
FWID_RAW_AHF Fracture Width from Apparent Horizontal Fracture Model without Correction
FWID_RAW_DF Fracture Width from Dipping Fracture Model without Correction
HD Hole Diameter
HDAR Hole Diameter from Area
HDOV Hole Diameter from Oval
LA Large Arm Caliper
LCAL Density Caliper
LNERRD Linear Least Square Fit Error - Downgoing Reflection
LNERRU Linear Least Square Fit Error - Upgoing Reflection
MCAL MLT (Microlog) Caliper
REFCD Down-going reflection coefficient channel
REFCU Up-going reflection coefficient channel
RHOB Bulk Density
ST_ENVD Envelope of time domain down-going reflection coefficient
ST_ENVU Envelope of time domain up-going reflection coefficient
ST_SDD Down-going Direct wave
ST_SDU Up-going Direct wave
ST_SRD Down-going Reflected wave
ST_SRU Up-going Reflected wave
STQFCT Stoneley Quality Factor
STRC Stoneley Reflection Coefficient
STRC_AHF Stoneley Reflection Coefficient Reconstructed from Apparent Horizontal Fracture Model
STRC_DF Stoneley Reflection Coefficient Reconstructed from Dipping Fracture Model
STTC Stoneley Transmission Coefficient
STTC_AHF Stoneley Transmission Coefficient Reconstructed from Apparent Horizontal Fracture Model
STTC_DF Stoneley Transmission Coefficient Reconstructed from Dipping Fracture Model
SWF1 Sonic Waveform 1
SWF2 Sonic Waveform 2
SWF3 Sonic Waveform 3
SWF4 Sonic Waveform 4
SWF5 Sonic Waveform 5
SWF6 Sonic Waveform 6
SWF7 Sonic Waveform 7
SWF8 Sonic Waveform 8
TC2RC2 Mass Balance Indicator from Sum of Squares of Transmission and Reflection Coefficients
TIST Stoneley Integrated Transit Time Channel
WAVELET Wavelet

Related parameters
ParameterDescription
CENFRQ Center frequency
DSTL Direct arrival Stoneley wave packet length
DTMUD Delta-T for Mud
FR1 First Chosen Frequency
FR2 2nd Chosen Frequency
MODEL_NAME Name of a model or version of some entity or algorithm; for equipment, it may coincide with the trade name.
REFC Minimum amplitude of time domain reflection coefficient
S2N Peak-to-noise-floor amplitude ratio for Stoneley spectrum estimates
THDD Acceptable deviation of intercept point for reflector locating
THDS Acceptable deviation of the reflection ray move-out slowness for reflector locating
THLC Acceptable linear least square error for reflector locating
WAVELET_TYPE Wavelet type e.g. By_Auto, By_Filter, Unit_Impulse
WF_FLG Flag to show which waveforms are utilized
WMUD Weight of Mud
ZMASK Minimum separation of two resolvable fractures


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