Method for estimating elastic parameters through inversion of 4D seismic measures
US9690001B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2011 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | May 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/6242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A 4D seismic technique, where a base seismic trace is measured at a first time in a region of the subsoil, and then a monitor seismic trace corresponding to the base seismic trace is measured at a second time. To interpret the 4D measurements, assumptions are made about the variation of elastic parameters in permeable layers at predefined positions in one direction between the first and the second time. Elastic parameters include the density (ρ) and the speed of propagation of the pressure waves (VP) in the permeable layers. Numerical evaluation is performed for a capability of each assumption about the variation of elastic parameters to give an account of a change between the measured base seismic trace and the measured monitor seismic trace, and the variation of the elastic parameters is estimated in accordance with an assumption of optimum capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.