Fast 3-D surface multiple prediction

摘要

A method and apparatus for predicting a plurality of surface multiples for a plurality of traces in a record of seismic data. In one embodiment, the method includes providing a plurality of target traces at a nominal offset and a nominal azimuth; selecting a plurality of pairs of input traces, wherein the midpoints of the input traces in each pair are separated by half the nominal offset and the azimuth of a line connecting the midpoints of the input traces in each pair is equal to the nominal azimuth; convolving the selected pairs of input traces to generate a plurality of convolutions; and applying a three dimensional operator to the convolutions.

主权项

1. A method for predicting a plurality of surface multiples for a plurality of input traces in a record of seismic data, comprising:
providing a plurality of target traces at a central offset value in a predetermined range of offsets between sources and receivers that correspond to the plurality of traces; predicting a plurality of two dimensional surface multiples for a plurality of input subsurface lines based on the plurality of target traces at the central offset value; and applying a two dimensional operator, using a computer, to the predicted two dimensional surface multiples, thereby predicting a plurality of three dimensional surface multiples for each target trace.