Method and system for pre-drill pore pressure prediction

Details Method and system for pre-drill pore pressure prediction Method and system for pre-drill pore pressure prediction

2007-11-20

2007-11-20

Picard, Leo (Department: 2125)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

C702S006000, C700S160000, C700S173000, C073S152010, C073S152030, C073S152430

Reexamination Certificate

active

11499931

ABSTRACT:
A method for pore pressure prediction. The method includes obtaining a stress sensitivity coefficient, obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location and obtaining a first predicted pore pressure. Further, the method includes iteratively performing calculating a total stress value associated with the pre-drill location using the first predicted pore pressure associated with the pre-drill location, and calculating a second predicted pore pressure associated with the pre-drill location using a stress-pressure relationship equation, a stress-velocity relationship equation, the stress sensitivity coefficient, a reference location, and at least one selected from a group consisting of the P-wave velocity and the S-wave velocity for the pre-drill location, and adjusting a drilling operation associated with the pre-drill location, based on the second predicted pore pressure.

REFERENCES:
patent: 5130949 (1992-07-01), Kan et al.
patent: 6351991 (2002-03-01), Sinha
patent: 6714873 (2004-03-01), Bakulin et al.
patent: 6968274 (2005-11-01), Tutuncu et al.
patent: 7042802 (2006-05-01), Sinha
patent: 2003/0125878 (2003-07-01), Bakulin et al.
patent: 2004/0141414 (2004-07-01), Huffman et al.
patent: 2004/0236513 (2004-11-01), Tutuncu et al.
patent: 2005/0065730 (2005-03-01), Sinha
patent: 2005/0149267 (2005-07-01), Van Den Beukel et al.
patent: 2005/0197780 (2005-09-01), Moos et al.
Sayers, C. M. et al.; “Predrill pore-pressure prediction using seismic data”; Geophysics Soc. Exploration Geophysicists USA; vol. 67, No. 4, Jul. 2002; pp. 1286-1292; XP007902195, ISSN: 0016-8033.
Eaton, B.A. et al.; “The Equation for Geopressure Prediction from Well Logs”; SPE 5544, 1975, 11 pages; XP008018943.
Fredrich, J. T. et al.; “Stress Perturbations Adjacent to Salt Bodies in the Deepwater Gulf of Mexico”; SPE Annual Technical Conference and Exhibition, SPE 84554; Oct. 4, 2003; pp. 5121-5134; XP002352275.
PCT International Search Report dated May 18, 2007.

Affiliated with

Also associated with

Rating

Method and system for pre-drill pore pressure prediction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for pre-drill pore pressure prediction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for pre-drill pore pressure prediction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3814377