Abstract
Electromagnetic induction logging is routinely used for the measurement of the electrical conductivity of rock formations from within an uncased borehole in order to determine producibility of hydrocarbons. Because of its usefulness in the open-hole environment, it was proposed to use this method inside steel-cased wells. The casings are magnetic and for five or six orders of magnitude more conductive than a typical rock formation. Thus, the measurements in through casing induction logging must be corrected for the variations in casing properties. It was suggested to employ existing casing inspection tools for this purpose. In this paper, we develop a stochastic approach to the inverse problem of determination of the casing properties using these tools. We numerically analyze the application of the inversion procedure to the model of a typical casing inspection measurement and investigate if the information obtained from the modeled data is applicable to the correction of the rock conductivity measurement for the casing effect. We conclude that the measurement uncertainty of the tool cannot exceed 1000 ppm if it is to be used for the casing effect correction.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Instrumentation and Measurement
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
