Method of processing seismic signals so as to reduce the effects

Details Method of processing seismic signals so as to reduce the effects Method of processing seismic signals so as to reduce the effects

1998-02-17

2000-02-29

Oda, Christine K.

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

367 63, 367 73, 364421, G01V 136

Patent

active

060321040

ABSTRACT:
A method of processing seismic signals for the analysis of moveout is presented in which waves are transmitted in a medium, reflected, received by receivers and recorded in the form of seismic traces. A string of N integers is defined having indices j lying between two limits (j.sub.min, j.sub.max) and representative of the moveouts of at least one predetermined gather of traces. A focus depth time t.sub.p for each value of j is calculated. A string of P integer numbers u is defined which determines an interval (P-1).DELTA.X. For each value of j, each trace identified by its parameters X.sub.0 and h is copied as many times as there are integer numbers u in the interval (P-1).DELTA.X. At least one static correction (dt) is applied to each of the copied traces, dependent at least on the parameters j, h and u .DELTA.X. Copying and static correction are repeated for all the values of X.sub.0 and of j.

REFERENCES:
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patent: 5285422 (1994-02-01), Gonzalez et al.
patent: 5596547 (1997-01-01), Bancroft et al.
Geophysics, "Normal moveout revisited: Inhomogeneous media and curved interfaces"; vol. 53, No. 2; (Feb. 1988) pp. 143-157; Eric de Bazelaire.
First Break, "What is DMO?", vol. 4, No. 7, Jul. 1986, pp. 7-24.
Geophysics, "A three-dimensional perspective on two-dimensional dip moveout"; vol. 53, No. 5 (May 1988), pp. 604-610; David Forel and Gerald H.F. Gardner.

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