Patent ID: 6977866
Filing Date: 2005-12-20
Classification: G01V

Abstract:
1. In a method for determining a fracture pressure gradient of a subsurface region of earth formations comprising: (a) obtaining seismic survey information about the subsurface region; (b) identifying a plurality of seismic horizons from the obtained survey information; (c) obtaining estimated seismic velocities corresponding to at least one interval between at least one pair of said plurality of seismic horizons; (d) calibrating the estimated seismic velocities to the parameter of interest (e) using the results of said calibration and the obtained seismic velocities to obtain said fracture pressure gradient at any location within the seismic survey; further comprising displaying the parameter of interest on one of: (i) P- or S-wave velocity displays; (ii) P-wave impedance displays; (iii) S-wave impedance displays; (iv) P-wave frequency attribute displays; (v) S-wave frequency attribute displays; (vi) P-wave phase attribute displays; (vii) S-wave phase attribute displays; (viii) density displays; (ix) P-wave amplitude attribute displays; (x) S-wave amplitude attribute displays.