Method of accurate fault location using common reflection point

Details Method of accurate fault location using common reflection point Method of accurate fault location using common reflection point

1992-03-05

1993-02-23

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 53, 367 73, G01V 128

Patent

active

051896435

ABSTRACT:
The invention relates to a method for locating correct near vertical boundary or fault positions in a velocity model using common reflection point (CRP) gathers. Conventional migration velocity analysis examines the migrated image for hints to correct the velocity model. Vertical boundaries such as faults or salt flanks must be accurately determined to produce reliable images of deeper reflectors. Previous methods have placed faults by trial and error, since a depth image of a nearly vertical boundary is difficult to produce. The present method examines the sensitivity of CRP gathers to abrupt lateral changes across a nearly vertical fault to determine the location and the dip of a nearly vertical fault from a series of CRP gathers.

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