Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1986-10-20
1988-06-07
Buczinski, Stephen C.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 50, 364421, G01V 100
Patent
active
H00004820
ABSTRACT:
A seismic data processing method in which seismic traces (each trace containing a signal resulting from reflection of a seismic signal at a location within the earth, and each trace being associated with at least one point in a two-dimensional spatial grid (x,y)) are subjected to Fourier transformations, the coefficients of the Fourier-Transformed traces are subjected to a recursive KF migration operation, and the migrated traces are thereafter inverse-Fourier-transformed. When displayed, the processed seismic data accurately represents the position within the earth of whatever caused the reflection. The method may be employed to process stacked seismic traces, each associated with a single point (x,y) in the grid, or may be employed to process unstacked seismic traces, each associated with both a seismic source location (x.sub.s,y.sub.5) and a different seismic receiver location (x.sub.r,y.sub.r) in the grid. In performing the method, the earth is modeled as a stack of M horizontal layers each characterized by a seismic wave velocity. The recursive KF migration step is iterated M-1 times for each trace, where part of the output of each iteration is stored and part discarded.
REFERENCES:
Dubrulle, A. A., "On Numerical Methods for Migration in Layered Media," Geophysical Prospecting, vol. 31, pp. 237-264, 1983.
Berryhill, J. R., "Wave-Equation Datuming," Geophysics, vol. 44, #8, Aug. 1979.
Berkhout et al., "Recursive Migration in Three Dimensions," Geophysical Prospecting, vol. 29, #5, pp. 758-781, Oct. '81.
R. H. Stolt, "Migration by Fourier Transform," Geophysics, vol. 43, No. 1, pp. 23-48 (Feb., 1978).
J. Gazdag, "Wave Equation Migration with the Phase-Shift Method," Geophysics, vol. 43, No. 7, pp. 1342-1351 (Dec., 1978).
J. Gazdag, "Wave Equation Migration with the Accurate Space Derivative Method", Geophysical Prospecting, vol. 28, pp. 60-70 (1980).
Berryhill John R.
Gonzalez Ruth
Kim Young C.
Buczinski Stephen C.
Wallace Linda J.
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