Method and apparatus to determine permeability of rock formations adjacent a borehole
US4764903A · kind A · utility
6Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1984 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Mar 28, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determination of earth formation permeability in situ. A logging sonde supported in a borehole derives attenuation data from at least two ultrasonic energy transmission paths which have a common alignment but differing length, the attenuation data can then be used to determine an empirical X parameter that is directly related to formation permeability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.