Method for determining rock mechanical properties using electrical log data
US5416697A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Jul 31, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for determining rock mechanical properties and for selecting a drill bit is disclosed. A set of electrical log data parameters over a selected zone in a wellbore is provided, and the respective shale and non-shale volumes are determined. A fluid-corrected Poisson's ratio for the non-shale volume is determined. Shear wave velocity for the shale volume is then determined and a corrected Poisson's ratio, relating to shale volume and fluid composition is determined. Uniaxial compressive strength, angle of internal friction, and cohesive shear strength can be determined, and drill bits selection can therefore be made more accurately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.