Integrated anisotropic rock physics model
US7676349B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2005 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Jul 10, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V99/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method for constructing an integrated rock physics model that simulates both shale anisotropy and stress-induced anisotropy of clastic rocks. In the model, the total pore volume is divided into three parts according to the estimated shale volume and effective stress: (1) clay-related pores, (2) sand-related pores, and (3) microcracks (mainly in the sand component). The pore space is then partitioned into the clay-related and sand-related pores using a scheme first disclosed by Xu and White in 1995. The model simulates shale anisotropy via the preferred orientation of clay-related pores and stress-induced anisotropy via the preferred orientation of microcracks, which is controlled by the differential stresses. Laboratory measurements or well logs are needed to establish a relationship between crack density and the effective stress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.