Method for detecting and locating water-producing zones and/or water thief zones in subterranean formations
US3940612A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1974 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Oct 4, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V9/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for locating water-producing zones and/or water thief zones in a subterranean formation penetrated by a well bore comprising the sequential steps of: PA1 A. injecting into said formation an aqueous solution containing from about 0.01 to 7.5 weight percent of an irradiated water soluble compound, said compound having preferential silica adsorptive characteristics; PA1 B. passing radioactivity detection means through the well bore and recording the measurement of radioactivity; PA1 C. returning the reservoir or injection well to normal production or normal water injection; PA1 D. passing said radioactivity detection means through the well bore and recording the measurement of radioactivity of said formation; and, PA1 E. comparing the measurements of radioactivity to determine water producing zones and/or water thief zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.