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Reverse-time depth migration with reduced memory requirements

  • US 20100054082A1
  • Filed: 08/29/2008
  • Published: 03/04/2010
  • Est. Priority Date: 08/29/2008
  • Status: Abandoned Application
First Claim
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1. A method for computing prestack reverse-time migration of recorded seismic data, comprising:

  • creating a discretized model containing a volume enclosed by boundaries with arbitrary boundary conditions;

    forward propagating a source wave over the volume based upon the source data;

    saving values of the wavefield created by the source wave at an interface between the boundaries and the migration volume;

    back propagating receiver waves based upon the receiver data;

    back propagating the source wave by using the saved values of the wavefield as time-varying boundary conditions, for the same time intervals as the back propagation of the receiver data; and

    correlating the back propagated source wave and back propagated receiver data.

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