Method for establishing a surface consistent correction for the

Details Method for establishing a surface consistent correction for the Method for establishing a surface consistent correction for the

1984-12-24

1987-09-22

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 36, 364421, G01V 136

Patent

active

046959840

ABSTRACT:
A method useful in seismic data processing for correcting data for the effects of the low velocity layer. At least three sets of traces having common offsets are displayed as a function of centerpoint. From this, the first refraction arrival for each trace may be hand picked, this first refraction arrival representing a compressional wave refracted along the lower boundary of the low velocity layer. An equation is set up for each source-receiver pair in which the transit time of the first refraction arrival is a function of three independent factors: the source to receiver distance; a low velocity layer component for the source; and a low velocity layer component for the receiver. These equations are solved in a simultaneous, least squares fashion to yield surface consistent solutions to the low velocity layer component at each source and receiver location.

REFERENCES:
patent: 4498157 (1985-02-01), Morter et al.
patent: 4577298 (1986-03-01), Hinkley
patent: 4581724 (1986-04-01), Zachariadis
Bath, M.; "An Analysis of . . . Refraction Seismology", 12/78, pp. 155-169, Techtonaphysics, vol. 51, #3-4, Abst.
Hollingshead et al, "A Novel Method of . . . Refraction", 1979, pp. 1-36, 49th Ann., SEG Mtg., R-21, Abst.
Yokahura et al, "A Simple Method . . . Reflection Method", 1983, pp. 32-42, Butsuri-Tonko, vol. 36, #4, Abst.
Chun et al, "The First Arrival Time . . . Statics", 10/15/81, pp. 3801-3847, 51st Ann., SEG Mtg., S214, Abst.

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