System and method for computing residual moveout from seismic images

摘要

A method is described for residual moveout analysis using dynamic warping. The residual moveout curves or surfaces may be used to flatten common image gathers or derive velocity models. The method may be executed by a computer system.

主权项

1. A computer-implemented method for deriving residual moveout curves or surfaces, comprising:
a. receiving a seismic image representative of a subsurface volume of interest; b. filtering the seismic image, via a computer processor, to remove noise to produce a filtered image; c. smoothing the filtered image, via the computer processor, to produce a smoothed image; d. bandpass-filtering the smoothed image, via the computer processor, to produce bandlimited CDP image gathers; e. sorting the bandlimited CDP image gathers into a plurality of common-offset volumes; f. performing dynamic image warping between adjacent ones of the plurality of common-offset volumes to produce a plurality of depth-shift volumes; g. sorting the plurality of depth-shift volumes into a plurality of depth-shift common-image-point (CDP) gathers; h. filtering the plurality of depth-shift CDP gathers along all dimensions to produce a plurality of noise-reduced depth-shift CDP gathers; i. selecting a sparse set of picks from the bandlimited CDP image gathers; and j. deriving a residual moveout curve or surface-based on the sparse set of picks and the noise-reduced depth-shift CDP gathers.