Error correction and calibration of a deep reading...

Details Error correction and calibration of a deep reading... Error correction and calibration of a deep reading...

2006-11-28

2006-11-28

Lefkowitz, Edward (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

C324S339000

Reexamination Certificate

active

07141981

ABSTRACT:
A resistivity logging tool suitable for downhole use includes a transmitter, two spaced apart receivers. The measured resistivities at the two receivers are corrected for differences in receiver characteristics based on measuring the responses of the receivers to a calibration signal passed through calibration circuits. The logging tool may be used in reservoir navigation. A calibration antenna positioned between the two receivers may be used to identify factors other than the distance to a bed boundary that may effect the receiver signals.

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J. B. Brami;Current Calibration and Quality Control Practices for Selected Measurement-While-Drilling Tools, SPE 22540, XP-002348764, Society of Petroleum Engineers, Oct. 8-9, 1991, pp. 49-64.

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