Method for angle-domain common image gather
AssigneesChina Petroleum & Chemical Corporation, Sinopec Tech Houston
InventorRui YAN
Life of this patent
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Abstract
A method for angle-domain common image gather (ADCIG) of a subsurface formation includes the step of converting seismic incident waves and seismic scattered waves at each of a number of image locations from time domain to frequency domain using Fourier transform. At each image location, the seismic waves in the frequency domain are decomposed into a number of local plane waves. Applying a cross-correlating imaging condition amongst the local plane waves to obtain a partial image at each image location. The plurality of partial images are then sorted into the angle domain.
Claims6
A method for angle-domain common image gather (ADCIG) of a subsurface formation, comprising:
- converting seismic waves at one of a plurality of image locations from time domain to frequency domain using Fourier transform;
- decomposing seismic waves in the frequency domain into a plurality of local plane waves at the one of the plurality of image locations;
- and
- producing a partial image by applying a cross-correlating imaging condition between the to the plurality of local plane waves at the one of the plurality of image locations.
Dependencies are inferred from the claim text.