Patent ID: 7715986
Filing Date: 2010-05-11
Classification: G01V

Abstract:
1. A computer-implemented method of attenuating multiples in multiply-reflected, surface-related seismic waves within the earth's subsurface utilizing a computer system comprising at least one processor configured to communicate with at least one computer memory device and configured for executing computer program code for performing the method comprising: (a) initializing an earth model, on at least one processor of the computing system, related to a geological volume within the earth's subsurface; (b) selecting a beam dataset, stored on at least one memory device, derived from seismic data related to the geological volume; (c) selecting an input beam from the beam dataset; (d) selecting a multiple-generating surface from the earth model; (e) selecting a time gate; (f) executing computer program code, on at least one processor of the computing system, configured for determining a stationary pegleg utilizing the input beam, the multiple-generating surface and the time gate; (g) executing computer program code, on at least one processor of the computing system, configured for obtaining a primary beam which corresponds to the stationary pegleg; (h) executing computer program code, on at least one processor of the computing system, configured for obtaining a modeled pegleg beam that is related to the primary beam; (i) executing computer program code, on at least one processor of the computing system, configured for convolving the primary beam and the modeled pegleg beam to obtain a convolved multiples beam; (j) executing computer program code, on at least one processor of the computing system, configured for deconvolving the convolved multiples beam with the input beam to remove the multiples in the input beam; and (k) repeating steps (c) to (j) for a plurality of beams, steps (d) to (j) for a plurality of multiple-generating surfaces, and steps (e) to (j) for a plurality of time gates, to generate an image of the geological volume.