Schlumberger

Mnemonics, Tools, ISLT-A


CodeISLT-A
TechnologyAcoustic
DisciplinePetrophysics
MethodWIRELINE
DescriptioniFlex Sonic Logging Tool

Related channels
ChannelDescription
BATT BHC Attenuation from Downhole Tool
CBL CBL Amplitude
CBSL CBL Amplitude (Sliding Gate)
CERP Label Energy Peak Coherence, Receiver Array, Compressional - Monopole P&S
CERS Label Energy Peak Coherence, Receiver Array, Shear - Monopole P&S
CMCG CBL Cement Type Compensation Gain
DATN Discriminated BHC Attenuation
DBI Bond Index from Discriminated Attenuation
DCBL Synthetic CBL from Discriminated Attenuation
DT Delta-T (also called Slowness or Interval Transit Time)
DT_HR High Resolution Acoustic Slowness
DTC_FT Delta-T Compressional - DDBHC Far Tx
DTC_LT Delta-T Compressional - DDBHC Lower Tx
DTC_RA_BHC Delta-T Compressional, Receiver Array - BHC by Upper and Lower Transmitters
DTC_RA_FT Delta-T Compressional, Receiver Array - Far Transmitter
DTC_RA_LT Delta-T Compressional, Receiver Array - Lower Transmitter
DTC_RA_UT Delta-T Compressional, Receiver Array - Upper Transmitter
DTC_TA_FT Delta-T Compressional, Transmitter Array - Far Transmitter
DTC_TA_LT Delta-T Compressional, Transmitter Array - Lower Transmitter
DTC_TA_UT Delta-T Compressional, Transmitter Array - Upper Transmitter
DTC_UT Delta-T Compressional - DDBHC Upper Tx
DTCO Delta-T Compressional
DTHR Delta-T High Resolution Receiver
DTL Delta-T Long Spacing
DTLF Delta-T Long Spacing Far
DTLN Delta-T Long Spacing Near
DTLN_HR High Resolution Acoustic Slowness (LS)
DTS_FT Delta-T Shear / DDBHC Far Tx
DTS_LT Delta-T Shear / DDBHC Lower Tx
DTS_RA_BHC Delta-T Shear, Receiver Array - BHC by Upper and Lower Transmitters
DTS_RA_FT Delta-T Shear, Receiver Array - Far Transmitter
DTS_RA_LT Delta-T Shear, Receiver Array - Lower Transmitter
DTS_RA_UT Delta-T Shear, Receiver Array - Upper Transmitter
DTS_TA_FT Delta-T Shear, Transmitter Array - Far Transmitter
DTS_TA_LT Delta-T Shear, Transmitter Array - Lower Transmitter
DTS_TA_UT Delta-T Shear, Transmitter Array - Upper Transmitter
DTS_UT Delta-T Shear / DDBHC Upper Tx
DTSM Delta-T Shear
DTYP Delta-T Type
DTYP_LN Delta-T Type (LS)
FLSA Flag for Low Sonic Amplitude
FTDV Fraction of Slownesses Declared Valid
FTDV_LN Fraction of Slownesses Declared Valid (LS)
FTPU Fraction of Valid data in Preference Used
FTPU_LN Fraction of Valid data in Preference Used (LS)
FVPU Fraction of Valid Data in Preference Used
ISLT_DEP_TT Depth for TT data copy indicator
ISLT_DEP_WF Depth for TT data copy indicator
ISLT_HW_TOOL ISLT Hardware Status
ISLT_LQC_HW_TOOL ISLT Total Hardware LQC
LATT Lower Attenuation from Tool
LQC_HW_STAT Hardware Total Status
NATN Near Attenuation
NATN_L5 Near Attenuation LowerTx-L5
NATN_U1 Near Attenuation UpperTx-R1
NBI Bond Index From Near Attenuation
NCBL Synthetic CBL from Near Attenuation
NPK_RA_FT Number of STC Peaks, Receiver Array - Far Transmitter
NPK_RA_LT Number of STC Peaks, Receiver Array - Lower Transmitter
NPK_RA_UT Number of STC Peaks, Receiver Array - Upper Transmitter
NPK_TA_FT Number of STC Peaks, Transmitter Array - Far Transmitter
NPK_TA_LT Number of STC Peaks, Transmitter Array - Lower Transmitter
NPK_TA_UT Number of STC Peaks, Transmitter Array - Upper Transmitter
PKCH_RA_FT STC Peak Coherence, Receiver Array - Far Transmitter
PKCH_RA_LT STC Peak Coherence, Receiver Array - Lower Transmitter
PKCH_RA_UT STC Peak Coherence, Receiver Array - Upper Transmitter
PKCH_TA_FT STC Peak Coherence, Transmitter Array - Far Transmitter
PKCH_TA_LT STC Peak Coherence, Transmitter Array - Lower Transmitter
PKCH_TA_UT STC Peak Coherence, Transmitter Array - Upper Transmitter
PKSL_RA_FT STC Peak Slowness, Receiver Array - Far Transmitter
PKSL_RA_LT STC Peak Slowness, Receiver Array - Lower Transmitter
PKSL_RA_UT STC Peak Slowness, Receiver Array - Upper Transmitter
PKSL_TA_FT STC Peak Slowness, Transmitter Array - Far Transmitter
PKSL_TA_LT STC Peak Slowness, Transmitter Array - Lower Transmitter
PKSL_TA_UT STC Peak Slowness, Transmitter Array - Upper Transmitter
PKTI_RA_FT STC Peak Time, Receiver Array - Far Transmitter
PKTI_RA_LT STC Peak Time, Receiver Array - Lower Transmitter
PKTI_RA_UT STC Peak Time, Receiver Array - Upper Transmitter
PKTI_TA_FT STC Peak Time, Transmitter Array - Far Transmitter
PKTI_TA_LT STC Peak Time, Transmitter Array - Lower Transmitter
PKTI_TA_UT STC Peak Time, Transmitter Array - Upper Transmitter
PR Poisson's Ratio
R42R R4 to R2 Sensitivity Ratio
RLAT Raw Lower Attenuation from Downhole Tool
RUAT Raw Upper Attenuation from Tool
SA_L2 Sonic Amplitude LowerTx-R2
SA_L4 Sonic Amplitude LowerTx-R4
SA_L5 Sonic Amplitude LowerTx-R5
SA_L6 Sonic Amplitude LowerTx-R6
SA_U1 Sonic Amplitude UpperTx-R1
SA_U2 Sonic Amplitude UpperTx-R2
SA_U4 Sonic Amplitude UpperTx-R4
SATN Short Attenuation
SBI Bond Index from Short Attenuation
SCBL Synthetic CBL from Short Attenuation
SNR_L2 S/N Ratio LowerTx-R2
SNR_L4 S/N Ratio LowerTx-R4
SNR_L5 S/N Ratio LowerTx-R5
SNR_L6 S/N Ratio LowerTx-R6
SNR_U1 S/N Ratio UpperTx-R1
SNR_U2 S/N Ratio UpperTx-R2
SOBS Label Borehole Size for Bias Correction
SPAA1 Sonic Peak Amplitude Array 1
SPAA2 Sonic Peak Amplitude Array 2
SPAA3 Sonic Peak Amplitude Array 3
SPJ_RA_FT STC Slowness Projection, Receiver Array - Far Transmitter
SPJ_RA_LT STC Slowness Projection, Receiver Array - Lower Transmitter
SPJ_RA_UT STC Slowness Projection, Receiver Array - Upper Transmitter
SPJ_TA_FT STC Slowness Projection, Transmitter Array - Far Transmitter
SPJ_TA_LT STC Slowness Projection, Transmitter Array - Lower Transmitter
SPJ_TA_UT STC Slowness Projection, Receiver Array - Upper Transmitter
STTA1 Sonic Transit Time Array 1
STTA2 Sonic Transit Time Array 2
STTA3 Sonic Transit Time Array 3
SWFA1 Sonic Waveform Array 1
SWFA2 Sonic Waveform Array 2
SWFA3 Sonic Waveform Array 3
SWNA1 Sonic Waveform Normalization Factor Array 1
SWNA2 Sonic Waveform Normalization Factor Array 2
SWNA3 Sonic Waveform Normalization Factor Array 3
TIME_STC_RA_FT Time Index of STC Slowness Projection, Receiver Array - Far Transmitter
TIME_STC_RA_LT Time Index of STC Slowness Projection, Receiver Array - Lower Transmitter
TIME_STC_RA_UT Time Index of STC Slowness Projection, Receiver Array - Upper Transmitter
TT Transit Time for CBL
TT_L6 Transit Time LowerTx-R6
TT1 Transit Time 1
TT2 Transit Time 2
TT3 Transit Time 3
TTSL Transit Time (Sliding Gate)
UATT Upper Attenuation from Tool
ULTR Upper to Lower Transmitter Power Ratio
VDL Variable Density Log
VPVS Compressional to Shear Velocity Ratio
WDE1 Waveform Delay 1
WDE2 Waveform Delay 2
WDE3 Waveform Delay 3
WF1 Waveform 1
WF2 Waveform 2
WF3 Waveform 3

Related parameters
ParameterDescription
AMSG Auxiliary Minimum Sliding Gate
CASF Label Casing Function - Monopole P&S
CBAF CBL Adjustment Factor
CBLG CBL Gate Width
CBRA CBL LQC Reference Amplitude in Free Pipe
CLUSTER_INT Clustering Interval
COLL Label Slowness Lower Limit - Monopole P&S Compressional
COUL Label Slowness Upper Limit - Monopole P&S Compressional
CSIZ Casing Outer Diameter
CWEI Casing Weight
DDE1 Digitizing Delay 1
DDE2 Digitizing Delay 2
DDE3 Digitizing Delay 3
DETE Delta-T Detection
DFAD Digital First Arrival Detection Switch
DFAD_SLIM Slim Sonic DFAD Computation Control
DFD Drilling Fluid Density
DHNV_ISLT ISLT Firmware Version
DLHS Label Hole Diameter Source for SOBS Channel
DLSI Depth Log Sample Interval
DLSR Depth Log Sample Rate
DSIN Digitizer Sample Interval
DT_ABSENT ISLT Firmware Version
DTCM Delta-T Computation Mode
DTCS Compressional Delta-T Source for DTCO Channel
DTCS_SLIM Slim Sonic Compressional Delta-T Source for DTCO Channel
DTF Delta-T Fluid
DTMAX Maximum Valid Value for DT
DTSS Shear Delta-T Source for DTSM Channel
DTSS_SLIM Slim Sonic Shear Delta-T Source for DTSM Channel
DWCO Digitizer Word Count
FATT Acoustic Attenuation due to Fluid
FCF CBL Fluid Compensation Factor
FIL_LENG Filter length
FILG Label Fill Gap Control - Monopole P&S
FORM_SLOW Formation Slowness
FREQ_HIGH Filter high cut frequency
FREQ_LOW Filter low cut frequency
GAI1 Manual Gain 1
GAI1_SSLT SSLT Manual Gain 1
GAI2 Manual Gain 2
GAI2_SSLT SSLT Manual Gain 2
GAI3_SSLT SSLT Manual Gain 3
GBHCL Group BHC Limit
GNFL Group Near-Far Limit
GSEPL Group Separation Limit
GSIZL Group Size Limit
HOLE_DIA Hole Diameter
ISLT_DFTP Data Frames for ISLT Test Phase
ITWI_FT STC Integration Time Window - Far Transmitter
ITWI_LT STC Integration Time Window - Lower Transmitter
ITWI_UT STC Integration Time Window - Upper Transmitter
LFC Label Formation Character - Monopole P&S
LPM_FT Label Processing Mode - Far Transmitter
LPM_LT Label Processing Mode - Lower Transmitter
LPM_UT Label Processing Mode - Upper Transmitter
MAHTR Manual High Threshold Reference for first arrival detection
MATT Maximum Attenuation
MCS Mean Casing Slowness
MNHTR Minimum High Threshold Reference for first arrival detection
MODE Sonic Firing Mode (e.g. DDBHC = Depth-Derived BHC, STRA = Single Transmitter, SREV = Single Receiver
MODE_SSLT SSLT Firing Mode
MUD_SLOW Mud Slowness
NFLG Normalization Flag
NFLIM Near-Far boundary distance
NFPI_L5 Near Free Pipe Sonic Amplitude for Lower Transmitter - Receiver 5
NFPI_U1 Near Free Pipe Sonic Amplitude for Upper Transmitter - Receiver 1
NMSG Near Minimum Sliding Gate
NMXG Near Maximum Sliding Gate
NUMP Number of Detection Passes
POWER_SAVE_TEST ISLT Powersave test Mode
PROC_INT Processing Interval
R42R R4 to R2 Sensitivity Ratio
RATE Firing Rate
REJREP Reject Repeated Transit Times
RSMN Label Shear/Compressional Minimum Ratio - Monopole P&S
RSMX Label Shear/Compressional Maximum Ratio - Monopole P&S
RXG Receiver Geometry - Sonic
SALL Sonic Amplitude Lower Limit
SAS Sonic Array Status
SBOF_FT STC Search Band Offset - Far Transmitter
SBOF_LT STC Search Band Offset - Lower Transmitter
SBOF_UT STC Search Band Offset - Upper Transmitter
SBWI_FT STC Search Band Width - Far Transmitter
SBWI_LT STC Search Band Width - Lower Transmitter
SBWI_UT STC Search Band Width - Upper Transmitter
SDL Standard Deviation Acceptance Limit
SDTH Switch Down Threshold
SEMTHR STC Semblance Threshold
SENSOR_DIA Standard Deviation Acceptance Limit
SFAF Sonic Formation Attenuation Factor
SFPI Short Free Pipe Sonic Amplitude
SFPI_L6 Short Free Pipe Sonic Amplitude for Lower Transmitter - Receiver 6
SGAD Sliding Gate Status
SGCL Sliding Gate Closing Delta-T
SGCW Sliding Gate Closing Width
SGDT Sliding Gate Delta-T
SGW Sliding Gate Width
SHORT_FRAME_MODE ISLT Short Frame Mode
SLEV Signal Level for AGC
SLL Slowness Lower Limit
SPM_FT STC Processing Mode - Far Transmitter
SPM_LT STC Processing Mode - Lower Transmitter
SPM_UT STC Processing Mode - Upper Transmitter
SSTE Slowness Step
STC_LCF STC Low Cutoff Frequency
STHR Separation Threshold
STLL Label Slowness Lower Limit - Monopole Stoneley
STUL Label Slowness Upper Limit - Monopole Stoneley
SUL Slowness Upper Limit
SUTH Switch Up Threshold
SWID_FT STC Slowness Width - Far Transmitter
SWID_LT STC Slowness Width - Lower Transmitter
SWID_UT STC Slowness Width - Upper Transmitter
T12_TTMAX T12 TT Intercept Maximum
T12_TTMIN T12 TT Intercept Minimum
T3_TTMAX T3 TT Intercept Maximum
T3_TTMIN T3 TT Intercept Minimum
TFSI Filter Sample Interval
TFWL Filter Window Length
TLL_FT STC Time Lower Limit - Far Transmitter
TLL_LT STC Time Lower Limit - Lower Transmitter
TLL_UT STC Time Lower Limit - Upper Transmitter
TP_FRAME ISLT Test Phase Frame
TRCLL_SLIM Slim Sonic Tracking Compressional Slowness Lower Limit
TRCUL_SLIM Slim Sonic Tracking Compressional Slowness Upper Limit
TRSLL_SLIM Slim Sonic Tracking Shear Slowness Lower Limit
TRSUL_SLIM Slim Sonic Tracking Shear Slowness Upper Limit
TSTE Time Step
TTPROC_ALGSEL Algorithm Select
TWID_FT STC Time Width - Far Transmitter
TWID_LT STC Time Width - Lower Transmitter
TWID_UT STC Time Width - Upper Transmitter
TXG Transmitter Geometry - Sonic
ULTR Upper to Lower Transmitter Power Ratio
VDLG VDL Manual Gain
VDM VDL Display Mode
VDM_SSLT SSLT VDL Display Mode
ZCMT Acoustic Impedance of Cement


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