Patent ID: 6625543
Filing Date: 2003-09-23
Classification: G01V

Abstract:
A method of re-gridding seismic data, comprising:performing normal moveout on an input data set to generate a corrected input data set comprising a plurality of input traces each corresponding to an input location along an input grid; and generating a re-gridded output seismic data set corresponding to an output grid comprising a plurality of output locations, the output data set comprising a plurality of output traces corresponding to the plurality of output locations, wherein generating the output data set comprises performing output-based azimuth moveout to generate an output trace corresponding to each output location by identifying a summation trajectory for the output trace, the summation trajectory comprising a subset of input locations contributing to the output trace, wherein at least one of the input locations along the summation trajectory has a different azimuth and midpoint from said each output location, computing a contribution of each of the input traces along the summation trajectory to the output trace, and summing the contribution of said each of the input traces into the output trace.