Patent ID: 6021379
Filing Date: 2000-02-01
Classification: G01V,G06F

Abstract:
A method for reconstructing a seismic wavefield at a designated common midpoint and offset location from a set of prestack seismic data traces obtained from a seismic survey, each of said seismic data traces being a time series of discrete samples of the seismic signal received by a seismic receiver, said method comprising the steps of:selecting the seismic wavefield to be reconstructed;determining the normal moveout velocity of said seismic wavefield;selecting a set of input data traces from said set of common midpoint seismic data traces,said input data traces having common midpoint and offset locations proximate to said designated location;performing a normal moveout correction of said input data traces using said normal moveout velocity of said selected seismic wavefield; andgenerating a reconstructed data trace representative of said seismic wavefield at said designated location by mapping each data sample on each of said normal moveout corrected input data traces onto its corresponding location on said reconstructed data trace.