Pore pressure from spectroscopy and sonic data
US9238962B2 · kind B2 · utility
1Cited by
5References
22Claims
0Family size
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Key dates
| Filing date | Dec 19, 2011 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Jul 11, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A logging tool capable of making different types of measurements is provided, and a plurality of measurements on a formation are obtained. Certain mineral properties of the formation are assumed and a mixed properties theorem for the formation is invoked. Upper and lower velocity limits for sonic waves traveling through the formation are determined using the above information. Biot's constant is also computed using the above information. LWD data on the formation is obtained and an effective stress is determined. A total stress is determined and, from that and the other information, a pore pressure is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.