Schlumberger

Mnemonics, Software product, BORSCAN


CodeBORSCAN
NameBorScan
DisciplineGeology
TypeAPPLICATION
DescriptionPre-processing of micro-resistivity and ultrasonic images, and dipmeter curves.

Related channels
ChannelDescription
AMPLITUDE_25 Lower quartile value of the ultrasonic imager amplitude distribution
AMPLITUDE_75 Upper quartile value of the ultrasonic imager amplitude distribution
AMPLITUDE_MEDIAN Median value of the ultrasonic imager amplitude distribution
DEPTH_SHIFT (Corrected depth - measured depth) as function of measured depth.
RADIUS_25 Lower quartile value of the borehole radius distribution
RADIUS_75 Upper quartile value of the borehole radius distribution
RADIUS_MEDIAN Median value of the borehole radius distribution
STICKING_INDICATOR This is 1 if the tool is stuck and 0 otherwise.
TOOL_ACCELERATION Tool acceleration.
TOOL_VELOCITY Tool velocity.
TTIME_25 Lower quartile value of the ultrasonic imager transit time distribution
TTIME_75 Upper quartile value of the ultrasonic imager transit time distribution
TTIME_MEDIAN Median value of the ultrasonic imager transit time distribution
XRBK Radius image from the UBI without eccentering correction
XRWF Radius image from the UBI without eccentering correction

Related parameters
ParameterDescription
BLOCK_DEPTH_SHIFT Uniform depth shift to be applied to output arrays and images
BORSCAN_PARAMETERS_FLOAT A vector of float parameters used in BorScan computations
BORSCAN_PARAMETERS_INT A vector of integer parameters used in BorScan computations
FMI_AUTO_BAD_BUTTONS_FLAG Whether to apply automatic method to detect bad buttons for correction.
FMI_BAD_BUTTONS Manually selected bad buttons for correction
FMI_EMEX_CORR_FLAG Whether to correct micro-resistivity button values for EMEX voltage.
FMI_EQUALIZE_FLAG Whether to equalize average micro-resistivity button response.
FMI_EQUALIZE_LOWER_CUTOFF Lower percentile cutoff to exclude low values in equalization computation
FMI_EQUALIZE_UPPER_CUTOFF Upper percentile cutoff to exclude high values in equalization computation
FMI_EQUALIZE_WINDOW Window length used in equalization of average micro-resistivity button response.
FMI_IMAGE_SPEED_CORR_FLAG Whether to apply image-based speed correction for micro-resistivity imagers
FMI_IMAGE_SPEED_CORR_PADS Micro-resistivity imager pads to use to compute image-based speed correction
GPIT_CABLE_CONFIDENCE_FACTOR Confidence factor on cable depth used in GPIT speed correction.
GPIT_RECOVERY_SPEED Ratio (average speed after sticking) / (average cable speed).
GPIT_SPEED_CORR_FLAG Whether to apply GPIT speed correction
GPIT_STICKING_DETECTION_FLAG Whether to use sticking detection logic in GPIT speed correction
GPIT_STICKING_DETECTION_THRESHOLD Sticking detection threshold used in GPIT speed correction.
USI_AMP_ECC_FLAG Whether to correct ultrasonic imager amplitudes for tool eccentering.
USI_AMP_TO_LIN_FLAG Whether to convert USI amplitudes from logarithm to linear.
USI_BIAS_CORR_FLAG Whether to apply sampling bias correction for USI data.
USI_ECC_AMP_CUTOFF Cutoff to exclude low values in ultrasonic imager amplitudes eccentering computation
USI_EMEX_FILTER_FLAG Whether to filter out noise in USI amplitudes induced by EMEX variations
USI_GAINS_CORR_FLAG Whether to correct USI amplitudes for uncalibrated gains used during acquisition
USI_RESAMPLE_FLAG Whether to resample ultrasonic imager data with respect to azimuth.
USI_TT_ECC_FLAG Whether to correct transit times from ultrasonic imagers for tool eccentering
USI_TT_TO_RADIUS_FLAG Whether to convert transit times from ultrasonic imagers to radii
USI_UNCORR_RADIUS_FLAG Whether to output ultrasonic imager radius array uncorrected for tool eccentering


Return to Curve Mnemonic Dictionary