Method of low-frequency seismic data enhancement for improving characterization precision of deep carbonate reservoir
US11262470B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2020 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Dec 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of low-frequency seismic data enhancement for improving the characterization precision of a deep carbonate reservoir includes: first performing inversions on an input seismic data set to obtain the corresponding reflection coefficients and average seismic wavelet; then constructing a seismic wavelet with rich low-frequency information; and finally, performing convolution on the seismic wavelet with rich low-frequency information and the reflection coefficients to obtain seismic data with rich low-frequency information and enhanced low-frequency energy. In the present invention, changes of the seismic data in a work area in transverse and longitudinal directions are taken into consideration, and processing parameters can be quickly determined according to actual conditions of the work area to obtain an optimal processing effect. In this way, the characterization quality of geological anomalies, such as a fault, a fracture system, or the like, in a deep carbonate reservoir can be improved significantly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.