System, Method and Computer-Program Product for In-Situ Calibration of a Wellbore Resistivity Logging Tool
First Claim
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1. A method for in-situ calibration of a logging tool deployed along a wellbore, the method comprising:
- acquiring a first measurement signal of a formation using the logging tool;
simulating a second measurement signal of the formation;
calculating a calibration coefficient based on a comparison between the acquired first measurement signal and the simulated second measurement signal;
acquiring a third measurement signal of the formation using the logging tool, wherein the first, second and third measurement signals correspond to the same transmitter-receiver pair of the logging tool; and
calibrating the acquired third measurement signal using the calibration coefficient.
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Abstract
In-situ calibration of a resistivity logging tool is accomplished using a variety of methods in which deep measurement signals are calibrated using acquired and simulated measurement signals.
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Citations
25 Claims
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1. A method for in-situ calibration of a logging tool deployed along a wellbore, the method comprising:
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acquiring a first measurement signal of a formation using the logging tool; simulating a second measurement signal of the formation; calculating a calibration coefficient based on a comparison between the acquired first measurement signal and the simulated second measurement signal; acquiring a third measurement signal of the formation using the logging tool, wherein the first, second and third measurement signals correspond to the same transmitter-receiver pair of the logging tool; and calibrating the acquired third measurement signal using the calibration coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification