Method and apparatus for measuring horizontal fluid flow in downhole formations using injected radioactive tracer monitoring
US5077471A · kind A · utility
28Cited by
4References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Sep 10, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/11
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Formation fluid flows in earth formations (37) opposite a perforated (40) wellbore (15) zone are measured and monitored by injecting radioactive tracers (50) into the perforations (40), blocking the perforations to retain the tracers (50) in the formation (37), monitoring the apparent decay rates (58) of the injected tracers (50), and then determining the rate at which the tracers are being carrier away by fluid movements in the formation (37). From this the flow rate (60) of the fluids in the earth formations (37) adjacent the borehole interval is inferred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.