Borehole invariant porosity measurement system
US5767510A · kind A · utility
26Cited by
8References
47Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jun 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods of apparatus for determining porosities of earth formations penetrated by a borehole, and more specifically for determining porosities of earth formations while the borehole is being drilled. Borehole invariant neutron porosity measurements are obtained using a borehole tool which provides the response of two detectors spaced axially at different spacings from a neutron source. No independent measure of borehole geometry is required to correct the resulting porosity measurements for variations in borehole size or variations of the position of the borehole tool within the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.