Method of geophysical exploration

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type

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367 31, 367 62, 364421, G01V 134, G01V 1053, G01V 136

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active

051365545

ABSTRACT:
A method of geophysical exploration for acquiring and processing multicomponent seismic data obtained with seismic sources generating shear waves having time-varying polarizations and seismic receivers recording at least two modes of propagation of the imparted shear waves is provided. More particularly, a method is described for acquiring multicomponent seismic data with torsional seismic sources and multicomponent seismic receivers, as well as a method for processing such multicomponent seismic data so as to ameliorate the effects of shear wave splitting in displayed seismic data. Additionally, principal time-series signals can be obtained which are representative of formation properties along principal axes of an anisotropic formation essentially free of the effects of shear wave splitting.

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Shieh et al., "Ground Roll: Rejection Using Polarization Filters", Geophysics, V55, #9, pp. 1216-1222, Sep. 1990; Abst only provided.
Crompin, S., "Evaluation of Anisotrophy by Shear-Wave Splitting", Geophysics. vol. 50, #1, pp. 142-152, Jan. 1985; Abst only provided.
Lynn et al., "Reflection Shear-Wave Data . . . Anisotrophy" 5th Annu. Soc Explor. Geophys. Int. Mtg., Nov. 6, 1986 Abst. only provided.

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