Radioactive well logging to determine vertical brine flow
US5065016A · kind A · utility
2Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Jun 11, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Brines in earth formations in the vicinity of a well borehole are bombarded with neutrons. The neutrons are slowed to thermal energy and captured by sodium atoms in the brine according to the nuclear reaction .sup.23 Na (n, .gamma.) .sup.24 Na. Spaced arrays of gamma ray detectors in a sonde in the borehole obtain gamma ray measurements following activation to obtain measurements of horizontal brine flow past the borehole. The detector arrays are vertically spaced from each other along the axis of the sonde. Changes in the count ratios of the detector arrays indicates a vertical flow of the brine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.