Sand-resistivity/conductivity and saturation evaluation in laminated formations with biaxial anisotropy
US10422917B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2016 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Jun 11, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed herein are embodiments of systems, methods, and computer program products for evaluating sand-resistivity and/or sand-conductivity, as well as saturation in laminated shale-sand formations with biaxial anisotropy (BA) in resistivity. In one embodiment, the method determines sand resistivity (Rsd) of the laminated shale-sand formation directly from triaxial resistivities (Rx, Ry, and Rz) of the laminated shale-sand formation based on a bimodal model with BA anisotropy. In another embodiment, the method determines sand resistivity (Rsd) directly based on a bimodal model with transverse isotropy (TI) anisotropy using the triaxial resistivities, horizontal resistivity, and vertical resistivity (Rx, Ry, Rz, Rh, and Rv). In another disclosed embodiment, the above methods may be used to perform quality control on a determined sand-resistivity and saturation of a laminated shale-sand formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.