Method and system for pre-drill pore pressure prediction
US7617051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2007 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Aug 23, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/306
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In general, the invention relates to a method for pore pressure prediction. The method includes obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location, calculating an effective stress at the pre-drilling location using a stress-velocity relationship equation, the compressional wave (P-wave) velocity and the shear wave (S-wave) velocity, obtaining a total stress at the pre-drill location, calculating a predicted pore pressure, at the pre-drill location, using the effective stress, the total stress and a stress-pressure relationship equation, and adjusting a drilling operation associated with the pre-drill location, based on the predicted pore pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.