| CPC G01V 1/282 (2013.01) [G01V 1/307 (2013.01)] | 9 Claims |
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1. A computer-implemented method, comprising:
a. receiving, at a computer processor, a seismic image including dip fields representative of a subsurface volume of interest;
b. generating, via the computer processor, a set of artificial and individually separable reflectors consistent with the dip fields;
c. generating, via the computer processor, synthetic seismograms consisting of seismic reflectors with known amplitude variation with angle (AVA);
d. performing seismic migration, via the computer processor, of the synthetic seismograms to generate common image point (CIP) gathers with migrated seismic reflectors;
e. defining an AVA basis function for each migrated seismic reflector wherein the AVA basis function is a depth-domain wavelet as a function of depth (z), CIP position (x,y), reflection angle (θ), and the vertical event position (e) of the migrated seismic reflector;
f. performing windowed deconvolution of the seismic image using the AVA basis functions to generate a spatially deblurred seismic image;
g. performing true-3D AVA modeling to create synthetic CIP angle gathers by convolving angle-dependent reflectivity with the AVA basis functions in each migrated seismic reflector's local time window accounting for dip and velocity;
h. performing true-3D AVA inversion for CIP gather of angle or offset-dependent reflectivity or rock properties by matching synthetic CIP angle gathers with the field data CIP angle gathers to generate a seismic inversion volume;
i. receiving well logs representative of the subsurface volume of interest; and
j. training a model using the well logs and the seismic inversion volume to create a rock property prediction model.
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