Log based diagenetic rock typing and sweet spot identification for tight gas sandstone reservoirs
US11873709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2020 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Mar 4, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/6246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods include a computer-implemented method: Total clay, effective porosity (PHIE) values, and gas volume are determined for a tight gas sandstone reservoir characterization using petrophysical evaluation results. Regions of the tight gas sandstone reservoir are characterized, including performing diagenetic rock typing for the regions using the total clay and PHIE values, where the diagenetic rock typing reflects porosity/permeability and clay content change. Sweet spots are determined based on the diagenetic rock typing and gas volume variation. Ranked sweet spots are determined by indexing and ranking the sweet spots by category. Optimized infill drilling locations and target zones are determined, and well placements in the tight gas sandstone reservoir are assisted using the diagenetic rock typing and the ranked sweet spots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.