A computer program for borehole compensation of dual-detector density well logs
Open-File Report
78-515
By: James Henry Scott
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Abstract
The computer program described in this report was developed for applying a borehole-rugosity and mudcake compensation algorithm to dual-density logs using the following information: the water level in the drill hole, hole diameter (from a caliper log if available, or the nominal drill diameter if not), and the two gamma-ray count rate logs from the near and far detectors of the density probe. The equations that represent the compensation algorithm and the calibration of the two detectors (for converting countrate or density) were derived specifically for a probe manufactured by Comprobe Inc. (5.4 cm O.D. dual-density-caliper); they are not applicable to other probes. However, equivalent calibration and compensation equations can be empirically determined for any other similar two-detector density probes and substituted in the computer program listed in this report.
* Use of brand names in this report does not necessarily constitute endorsement by the U.S. Geological Survey.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | A computer program for borehole compensation of dual-detector density well logs |
| Series title | Open-File Report |
| Series number | 78-515 |
| DOI | 10.3133/ofr78515 |
| Edition | - |
| Year Published | 1978 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | 7 leaves ;27 cm. |
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