Electromagnetic surveying for hydrocarbon reservoirs
US7542851B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2007 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Dec 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of analyzing results from an underwater controlled source electromagnetic (CSEM) survey of an area that is thought or known to contain a subterranean hydrocarbon reservoir is described. The method is based on a wavefield extrapolation of narrow-band electromagnetic field data obtained from pairs of source and receiver locations. The data comprise a plurality of discrete frequencies between 0.01 Hz and 60 Hz. The wavefield extrapolation is performed for each of these discrete frequencies to provide distributions of electromagnetic scattering coefficient as a function of position and depth beneath the survey area. These distributions may then be combined to provide a displayable image of electromagnetic scattering coefficient. The method is able to quickly provide a displayable image that is readily interpretable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.