Seismic survey system

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type

Reexamination Certificate

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C367S038000, C702S014000

Reexamination Certificate

active

06980482

ABSTRACT:
A method of analyzing seismic survey data in which a transfer function for a geological model is derived by ray tracing techniques applied to theoretical data and the transfer function is applied to actual survey data in order to calculate reflection points (50) and/or other attributes for each shot (42)/receiver (44) pair. The number of ray tracing calculations which have to be performed in deriving the model transfer function can thus be controlled. A sufficiently accurate transfer function can be derived using theoretical data representing substantially fewer shot (42)/receiver (44) pairs than are used in the traditional ray tracing solution applied directly to actual survey data. Attribute values for actual source (42)/receiver (44) pairs are estimated by interpolating the transfer function data.

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patent: 6169959 (2001-01-01), Dragoset, Jr.
Zelt, C.A., “Lateral velocity resolution from three-dimensional seismic refraction data”,Geophys. J. Int. 135: 1101-1112 (1998).

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