Multiple depths and frequencies for simultaneous inversion of el

Details Multiple depths and frequencies for simultaneous inversion of el Multiple depths and frequencies for simultaneous inversion of el

1994-03-11

1995-11-21

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

324339, 324341, 364422, G01V 328, G01V 330, G01V 338

Patent

active

054690625

ABSTRACT:
A wave propagation measurement-while-drilling system is used to determine selected formation and borehole properties. One or more transmitter-receiver pairs are utilized with the transmitter components operating at one or more frequencies to provide a measured data set. A model relating the borehole instrument response to a wide range of formation and borehole conditions is also utilized. Inversion techniques are employed to determine selected formation and borehole parameters of interest and to simultaneously correct the selected formation parametric measurements for the adverse effects of the borehole and formation bed boundaries thereby avoiding serial type corrections which can yield erroneous results in certain frequency ranges.

REFERENCES:
patent: 4314338 (1982-02-01), Suau et al.
patent: 4609873 (1986-09-01), Cox et al.
patent: 4980643 (1990-12-01), Gianzero et al.
patent: 5144245 (1992-09-01), Wisler
patent: 5210691 (1993-05-01), Freedman et al.
patent: 5230386 (1993-07-01), Wu et al.
patent: 5329235 (1994-07-01), Zhou et al.
"2MHz Propagation Resistivity Modeling in Thin Beds", W. Hal Meyer, The Log Analyst, Jul.-Aug. 1993, p. 33.
"Inversion of 2 MHz Propagation Resistivity Logs" W. H. Meyer, Society of Professional Well Log Analysts, 33rd Annual Logging Symposium, Jun. 14-17,. 1992.

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