Boots – shoes – and leggings
Patent
1989-09-26
1993-03-30
Envall, Jr., Roy N.
Boots, shoes, and leggings
367 38, 367 72, G01V 130
Patent
active
051989794
ABSTRACT:
In a preferred embodiment of the present invention, methods are provided for Kirchhoff-migrating seismic data using a parallel computer. The methods of the present invention preferably use a multiprocessor machine that is interconnected to form a hypercube. The presently preferred method is to build up one or more migrated output traces in each processor (node) designated as a "migration" processor, as input traces are passed from migration node to migration node along a nearest-neighbor chain. When an output trace is completed, it is sent by a migration node to storage via an appropriate I/O processor and the migration node beings building a new output trace. There is essentially no limit to the length of seismic line which can be so migrated. Alternatively, the input traces may be held in the migration nodes and the output traces passed from node to node along a nearest-neighbor chain, or the input and output traces may be passed in opposite directions along the chain. Further, the use of multiple migration chains allows for efficient operation over a wide range of number of available processors.
REFERENCES:
patent: 5050069 (1991-09-01), Hillis et al.
patent: 5138584 (1992-08-01), Hale
V. J. Madisetti and D. G. Messerschmitt, Seismic Migration Algorithms On Parallel Computers, 3rd Conf. on HyperCube Concurrent Computers & Applications, vol. II-Applications, 1988, pp. 1180-1186.
W. A. Schneider, Integral Formulation for Migration In Two and Three Dimensions, Geophysics, vol. 43, Nos. 1, 3-7, 1978, pp. 49-76.
D. Forel, G. H. F. Gardner, "A Three-Dimensional Perspective on Two-Dimensional Dip Moveout, Geophysics", vol. 53, No. 5, May 1988, pp. 604-610.
S. M. Deregowski, "What is DMO?", First Break, vol. 4, No. 7, Jul. 1986.
Enders A. Robinson, "Migration of Geophysical Data", Book, IHRDC, Publishers, Boston, Mass., Copyright 1983 (not included here).
Gregg Richard L.
Moorhead William D.
Tolle Donald M.
Bodendorf A.
Envall Jr. Roy N.
Shell Oil Company
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