Borehole correction system for an array induction well-logging a

Details Borehole correction system for an array induction well-logging a Borehole correction system for an array induction well-logging a

1991-01-08

1991-08-20

Jablon, Clark A.

Boots, shoes, and leggings

G01V 338, G01V 328

Patent

active

050419757

ABSTRACT:
A new borehole correction software, for use in a well logging truck computer, obtains an accurate measurement of the true conductivity of a formation in a borehole by subtracting a correction term, which is a function of the mud conductivity, the borehole radius, the standoff distance, and an estimated value of the formation conductivity, from certain raw data received by a receiver thereby producing a set of eighteen complex output voltages which represent signals that would have been recorded from the receiver had there been no borehole.

REFERENCES:
patent: 3179879 (1965-04-01), Tanguy
patent: 4158165 (1979-06-01), Coates
patent: 4338664 (1982-07-01), Mayer
patent: 4553097 (1985-11-01), Clark
patent: 4677386 (1987-06-01), Chapman
patent: 4714889 (1987-12-01), Chapman
patent: 4796186 (1989-06-01), Kaufman
"Phasor* Induction Tool" published by Schlumberger, copyright 1986.
"Log Interpretation Charts" published by Schlumberger Limited English--Metric 1979 Edition, copyright 1979.

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