Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1997-03-06
1997-12-09
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 53, 367 73, 364421, G01V 136, G01V 128
Patent
active
056967357
ABSTRACT:
A method of migrating seismic data using offset checkshot survey measurements. The offset checkshot survey measurements involve raypaths similar to the migration raypaths for the seismic data, and are used to determine direct arrival traveltimes to receivers in a borehole. Embodiments of the invention provide for direct use of the traveltimes in migration, or indirect use of the traveltimes in migration via construction of a migration velocity model. The velocity model embodiments further provide for either traveltime error correction via use of interpolated error functions or construction of migration error tables. The invention can be employed for time, depth or Kirchhoff migration, in either two or three dimension, and in either prestack or poststack applications.
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Bell K. A.
Exxon Production Research Company
Koch S. P.
Moskowitz Nelson
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