Chemical logging of geothermal wells
US4306879A · kind A · utility
2Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1979 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Dec 19, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The presence of geothermal aquifers can be detected while drilling in geothermal formations by maintaining a chemical log of the ratio of the concentrations of calcium to carbonate and bicarbonate ions in the return drilling fluid. A continuous increase in the ratio of the concentrations of calcium to carbonate and bicarbonate ions is indicative of the existence of a warm or hot geothermal aquifer at some increased depth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.