Patent Document ID: 8126651
Application ID: 11922815
Patent Flag: 1

Claim One:
1. A computer-implemented method for determining rock and fluid-type parameters of a subsurface region from measured seismic reflection data corresponding to a plurality of offsets at a single trace location, said method comprising: a. pre-processing the measured reflection data into a plurality of partial stacks; b. specifying a wavelet for each of the stacks; c. constructing a linearized set of reflectivity equations that relate seismic reflectivity to changes in elastic parameters of said subsurface region; d. constructing a linearized set of rock physics equations that relate changes in the elastic parameters to the rock and fluid-type parameters; e. combining the linearized reflectivity equations with the linearized rock physics equations; f. forming matrix equations by convolving the specified wavelets with the combined set of equations and equating to the measured data; and g. inverting the matrix equations to solve by a numerical method for said rock and fluid-type parameters, said solving by a numerical method being for all of the offsets simultaneously at the single trace location, wherein at least (g) is performed on a computer.