Inversion of CSEM data with measurement system signature suppression
US8239181B2 · kind B2 · utility
3Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2009 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Nov 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for suppressing measurement system signature, or artifacts, that arise when controlled source electromagnetic survey data are inverted to obtain a resistivity image of a subsurface region. The method involves identifying regions (47) where the image has low or rapidly varying sensitivity to data acquired by a given receiver, typically regions close to and under the given receiver. Then, in the iterative inversion process where a resistivity model is updated to minimize an objective function, the model update is modified (48) to reduce the impact of such low sensitivity regions on the update.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.