Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1995-10-06
1998-11-10
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
364421, G01V 128
Patent
active
058354522
ABSTRACT:
A method for measuring and using anisotropy in a coal bed sequence. The method includes the steps of: stripping layers where polarization changes are indicated by applying a static shift to components aligned with the slow shear wave polarization direction and applying one half of the static shift to components neither aligned with the slow shear wave polarization direction nor aligned with the fast shear wave polarization direction; obtaining for a coal bed a measure of the amplitude of the envelope of the fast polarization trace; rotating, by about 45 degrees away from a principal direction, the data set for that coal bed; obtaining a measure of the amplitude of the envelope of at least one of the mixed/mismatched polarization traces of that coal bed; and obtaining the ratio of the amplitude of the envelope of the fast polarization trace to the amplitude of the envelope of one mixed/mismatched polarization trace in that coal bed.
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Mueller Michael C.
Thomsen Leon
Tsvankin Ilya
Amoco Corporation
Gabala James A.
Lobo Ian J.
Sloat Robert E.
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