Estimating seismic anisotropy of shales
US8243549B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Mar 15, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In general, in one aspect, the invention relates to a method for determining properties of a subterranean formation. The method includes obtaining a micro-mechanical model for modeling the subterranean formation as a plurality of particles having low aspect ratio pores therebetween, wherein anisotropy of the subterranean formation is represented by normal compliance and shear compliance that describe deformation of the low aspect ratio pores under an applied stress, determining a ratio of normal compliance over shear compliance of the subterranean formation to obtain an estimated ratio of normal compliance over shear compliance, measuring a first formation parameter of the subterranean formation to obtain a measured first formation parameter based on a sonic measurement technique, determining a second formation parameter based on the micro-mechanical model using the estimated ratio of normal compliance over shear compliance and the measured first formation parameter, storing the second formation parameter of the subterranean formation, wherein the first formation parameter and the second formation parameter comprises at least one selected from a group consisting of an anisotropy pa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.