SYSTEM AND METHOD FOR SEISMIC IMAGING OF COMPLEX SUBSURFACE VOLUMES

摘要

A method is described for seismic imaging of complex subsurface volumes including an optimized partial stack based on ray coverage determined for vector image partition tiles. The method may be executed by a computer system.

主权项

1. A computer-implemented method of seismic imaging, comprising:
a. receiving a seismic dataset representative of a subsurface volume of interest and a velocity model; b. migrating each of a plurality of shots in the seismic dataset to create a plurality of shot images; c. assigning each of the plurality of shot images to one of a plurality of vector image partition (VIP) tiles; d. receiving a local geologic structure for an imaging location in the subsurface volume of interest; e. raytracing, based on the local geologic structure and the velocity model, from the imaging location to a surface above the imaging location, wherein the surface is defined by locations at which the seismic dataset was acquired; f. calculating ray coverage in each of the VIP tiles based on the raytracing; g. assigning weights to each of the VIP tiles based on the ray coverage; h. stacking the plurality of shot images using the assigned weights to create an partial stack seismic image; and i. identifying geologic features based on the partial stack seismic image.