Method and apparatus for calibrating readings of a downhole tool
US6389367B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Feb 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for calibrating readings of a downhole tool are provided. The method including collecting data representative of gamma ray photon energies detected by a downhole tool during the well-logging, a spectrum of the gamma ray photon energies detected by the downhole tool having a derivative with respect to the gamma ray photon energies. The method and program comprise calibrating the readings of the downhole tool using at least one predetermined correction factor based on the derivative of the spectrum of the gamma ray photon energies detected by the downhole tool. A computer-readable program storage device and a computer programmed to perform a set of instructions are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.