Multi-tracer logging technique
US4482806A · kind A · utility
7Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1981 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Oct 26, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/11
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method of logging a plurality of underground formations wherein a first and a second gamma ray emitting radioactive tracers with different energy levels are introduced into the formations. Logs are produced of the tracers as the traced fluids pass through the formations and thereafter the logs are analyzed to determined changes in effective permeabilities and sweep of the formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.