Identifying weighting material sag with pulsed neutron logs
US9696454B1 · kind B1 · utility
2Cited by
5References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 6, 2016 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Jan 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/101
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of identifying barite in a subterranean annulus that surrounds a wellbore, where the method includes detecting gamma rays in the wellbore that are generated from the annulus, obtaining a count rate of the detected gamma rays, comparing the count rate with reference data, and determining the presence of barite in the wellbore based on the comparison. The count rate can be a ratio of counts of detected gamma rays obtained from spaced apart receivers on a downhole tool, or a ratio of detected inelastic and capture gamma rays. The reference data is obtained by using a simulation algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.