Processing method for obtaining zero-offset seismic data by dept

Details Processing method for obtaining zero-offset seismic data by dept Processing method for obtaining zero-offset seismic data by dept

1996-06-06

1998-09-15

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 51, 367 73, G01V 128, G01V 130

Patent

active

058089640

ABSTRACT:
The object of the method according to the invention is to synthesize zero-offset seismic data from data acquired within the scope of three-dimensional (or possibly two-dimensional) multiple-offset seismic reflection prospecting operations in a subsurface environment. It mainly comprises selection of a distribution model of the velocities in the environment, seismic data prestack migration (stacking of the multiple-offset seismic events is achieved in the depth domain), and synthesis of zero-offset seismic data in the time domain by applying to the results obtained with this depth domain stacking a known modelling technique, for example that referred to as explosive reflector technique. This procedure allows zero-offset extrapolation of the seismic data obtained for non-zero offsets, even in case of great lateral velocity changes in the environment; the stacking performed allows then a much greater improvement of the signal-to-noise ratio than that based on the conventional stacking based on dynamic corrections (with or without dip corrections).
Application: 3D imagery of geologic structures for example.

REFERENCES:
patent: 4964103 (1990-10-01), Johnson
patent: 5067113 (1991-11-01), Hanson et al.
patent: 5089994 (1992-02-01), Harlan et al.
patent: 5229940 (1993-07-01), Wang et al.
patent: 5233569 (1993-08-01), Beasley et al.
patent: 5243563 (1993-09-01), Kim
Lowenthal et al., "The wave equation applied to Migration", Geophysical Prospecting, vol. 24, pp. 380-399, 1976.
Rockliff et al., "3-D depth migration in the Daipir Province of the Central North Sea", 62nd Ann. International Mtg., Soc. Explor. Geophys., Expanded Abstracts, pp. 925-926.
Geophysics Jun. 1989, USA, vol. 54, No. 6, ISSN 0016-8033, pp. 718-729, Al-Yahya K., "Velocity Analysis By Iterative Profile Migration,".

Affiliated with

Also associated with

Rating

Processing method for obtaining zero-offset seismic data by dept does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processing method for obtaining zero-offset seismic data by dept, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processing method for obtaining zero-offset seismic data by dept will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-95728