In situ lithology determination
US4475038A · kind A · utility
19Cited by
5References
32Claims
0Family size
Inventors
Key dates
| Filing date | Apr 16, 1982 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Apr 16, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for enhancing neutron induced gamma ray logging records includes generating a baseline signal which represents compton scattering noise and obtaining a difference signal by subtracting the baseline signal from the data signal. The noise reduced difference signal is calibrated to obtain abundances of elements in a rock formation. A lithology is determined by in situ measurement by using the noise reduced logging records to obtain abundances of individual elements which are used to correct water saturation and porosity and obtain mineral compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.