Method of determining earth elastic parameters in anisotropic media
US5737220A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Dec 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining the elastic moduli of anisotropic earth strata uses acoustic and density data without making simplifying approximations of the Christoffel relation or the assumption of weak anisotropy. To this end, the relation is converted algebraically into a linear system and solved analytically to generate a solution for estimating elastic moduli. Preferably, a set of qP phase points obtained from walkaway VSP data, with multiple vertical angles, plus at least one vertical SV point, are used to derive the elastic moduli A.sub.11, A.sub.13, A.sub.33, A.sub.55. In the case of FTIV or other orthorhombic media, the method may also be applied to obtain additional elastic moduli.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.