Method for determining the anisotropic properties of a subterran

Details Method for determining the anisotropic properties of a subterran Method for determining the anisotropic properties of a subterran

1995-02-06

1997-08-12

O'Shea, Sandra L.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

324338, 364422, G01V 310

Patent

active

056569300

ABSTRACT:
Formation anisotropic properties are determined using knowledge of the borehole dip angle and an induction logging instrument to obtain two formation derived resistivities. Separate shale layer anisotropic properties are further determined utilizing the logging instrument in a like manner. A sand resistivity and a net/gross ratio may be derived from the formation and shale layer anisotropic information.

REFERENCES:
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patent: 4636731 (1987-01-01), Savage et al.
patent: 4739255 (1988-04-01), Hagiwara
patent: 4899112 (1990-02-01), Clark et al.
patent: 5233522 (1993-08-01), Sinclair
patent: 5329448 (1994-07-01), Rosthal
Morani, J. H. and Kunz, K.S., Basic Theory of Induction Logging and Application to Study of Two-Coil Sondes, Oct. 14, 1985, pp. 829-858.

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