Method of geophysical exploration by analyzing shear-wave polari

Details Method of geophysical exploration by analyzing shear-wave polari Method of geophysical exploration by analyzing shear-wave polari

1991-06-13

1992-08-25

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

364421, G01V 100, G01V 128

Patent

active

051425017

ABSTRACT:
A method for geophysical exploration by analyzing shear-wave polarization directions relative to a fixed coordinate frame is disclosed, for either vertical seismic profile data or surface seismic reflection data. Energy in a selected time window of two off-diagonal components is determined, and the source and receiver coordinate frame is then rotated, and energy is again determined. A second rotation of the source and receiver coordinate frame is followed by a third energy determination. A simple trigonometric function equation is generated to fit the determined energy values, and a minimum energy value is determined. The coordinate frame is then rotated by the angle that gives the minimum energy value, so that all of the signal is put on the diagonal components.

REFERENCES:
patent: 4803666 (1989-02-01), Alford
patent: 4817061 (1989-03-01), Alford et al.
patent: 4888743 (1989-12-01), Thomsen
patent: 4903244 (1990-02-01), Alford
patent: 5027332 (1991-06-01), Alford
patent: 5029146 (1991-07-01), Alford

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