Method of creating common-offset/common-azimuth gathers in 3-D s

Details Method of creating common-offset/common-azimuth gathers in 3-D s Method of creating common-offset/common-azimuth gathers in 3-D s

1997-11-14

2000-02-15

Oda, Christine K.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 56, 367 58, G01V 104

Patent

active

060260599

ABSTRACT:
Processes are described for providing a data set useful for performing analysis of reflection attribute variation among traces in a window of three-dimensional seismic data, wherein the traces have a reflection point assigned thereto and wherein the traces represent recordings from shot-receiver pairs having various azimuth angles. According to one embodiment, the process comprises: assigning an offset value to a plurality of traces; fitting a substantially conical surface having a major and a minor axis to the data of the traces within the window, wherein: the major axis of the cone represents the azimuth direction having the lowest variation in the reflection attribute, and the minor axis of the cone represents the azimuth direction having the highest variation in the reflection attribute; assigning a coordinate set to the surface, wherein the coordinate set is related to a survey geometry of the data; and comparing the reflection attribute variation as a function of offset and azimuth.

REFERENCES:
patent: 4241429 (1980-12-01), Bloomquist et al.
patent: 4742497 (1988-05-01), Beasley et al.
patent: 4797861 (1989-01-01), Beasley
patent: 4980866 (1990-12-01), Wang et al.
patent: 5402391 (1995-03-01), Cordsen

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