Method for tomographically laterally varying seismic data veloci

Details Method for tomographically laterally varying seismic data veloci Method for tomographically laterally varying seismic data veloci

1989-10-31

1990-10-16

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 56, 364421, G01V 128

Patent

active

049640887

ABSTRACT:
A process for tomographic development of seismic section data having known source and receiver positions. The process employs forward modeling to estimate travel times of the rays through the earth medium. The medium is assigned a cellular constitution and ray tracking proceeds through individual cell analysis within a two dimensional neighborhood to join a series of individual cell velocity values, e.g. the velocity values at the cell corners. Ray tracing proceeds utilizing derived expressions for position, orientation, and travel time of the ray in the cell as a function of cell dimensions, initial ray position, ray orientation, and the neighborhood velocity values. A travel time equation is then derived and used to construct a model parameter estimation and finalized estimated data output.

REFERENCES:
patent: 4214226 (1980-07-01), Narasimhan et al.
patent: 4415999 (1983-11-01), Moeckel et al.
patent: 4679174 (1987-07-01), Gelfand
patent: 4839869 (1989-06-01), Corcoran

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