Determining properties of earth formations using the electromagnetic coupling tensor
US7656160B2 · kind B2 · utility
12Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2006 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Apr 10, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method to determine earth formation properties by positioning a logging tool within a wellbore in the earth formation, the logging tool having a tool rotation axis and a first, a second, and a third tilted transmitter coil, and a tilted receiver coil; rotating the logging tool about the tool rotation axis; energizing each transmitter coil; measuring a coupling signal between each transmitter coil and the receiver coil for a plurality of angles of rotation; determining a coupling tensor; and determining the earth formation properties using the coupling tensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.