Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
2008-10-31
2011-11-01
Dunn, Drew A (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
Reexamination Certificate
active
08050865
ABSTRACT:
Disclosed herein is a method of measuring a resistivity parameter of an earth formation. The method includes: applying a first electric measurement current including a first series of pulses to a first electrode and inducing a first formation current in the earth formation; applying a second electric measurement current including a second series of pulses to a second electrode and inducing a second formation current in the earth formation, the first series of pulses and the second series of pulses occupying distinct portions of a time domain in a selected time window; measuring the first measurement current, the first formation current, the second measurement current and the second formation current by coherent in-phase demodulation; and calculating at least one resistivity parameter by i) comparing the first measurement current to the first formation current and ii) comparing the second measurement current to the second formation current. A system for measuring a resistivity parameter of an earth formation is also provided.
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Maxit Jorge O.
Zhao Jinsong
Baker Hughes Incorporated
Cantor & Colburn LLP
Dunn Drew A
Sun Xiuquin
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