Patent ID: 7299132

Claim:
A method for pore pressure prediction, comprising: obtaining a stress sensitivity coefficient; obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location; obtaining a first predicted pore pressure; 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, wherein iterating is complete if a difference between the first predicted pore pressure and the second predicted pore pressure is less than or equal to a threshold difference value, and wherein the first predicted pore pressure is updated using the second predicted pore pressure if the difference is greater than the threshold difference value; and adjusting a drilling operation associated with the pre-drill location, based on the second predicted pore pressure.