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REVERSE-TIME MIGRATION WITH CORRECT EXTRAPOLATION OF PRESSURE AND SHEAR WAVES FOR BOREHOLE SEISMIC CASENormal access

Author: V.G. Baydin
Journal name: Seismic Technology
Issue: Vol 10, No 3, July 2013 pp. 1 - 9
DOI: 10.3997/2405-7495.2015054
Language: English
Info: Article, PDF ( 200.16Kb )
Price: € 30

Summary:
Reverse-time migration (RTM) is a well-proven method for surface seismic prospecting. However in borehole seismic (Vertical seismic profiling, VSP) direct usage of surface RTM method generates nonexistent interfaces (artifacts) due to ambiguity of primary/shear wave definition. These artifacts are often stable and cannot be wiped out after summation over all shots and often complicate the interpretation. This paper proposes a modified RTM algorithm that uses a different functional treat ing pressureand shear waves separately. Application of the new RTM method helps eliminate the ambiguity artifacts.


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