Method for obtaining estimates of a model parameter so as to characterise the evolution of a subsurface volume over a time period
US10379244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2015 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Jan 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/612
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Abstract Disclosed is a method for characterizing the evolution of a subsurface volume over time. The method comprises providing first and second surveys of the subsurface volume. Each survey comprises seismic data acquired by transmitting seismic signals into the subsurface volume and subsequently detecting some or all of the seismic signals after reflection within the subsurface. The first seismic data of the first survey corresponds to a first time and the second seismic data of the second survey corresponds to a second time. At least some of the first seismic data and the second seismic data is obtained with a non-zero offset. An inversion is performed to obtain estimates of changes having occurred between the first time and the second time in terms of at least one model parameter; wherein for the inversion: the first seismic data and the second seismic data is not processed to be equivalent to zero-offset data prior to the inversion; and it is assumed that the path taken by each received seismic signal between its transmission and reception is the same for the first survey and the second survey.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.