Abstract
New, more exact approximated solution to the direct problem of identifying a signal of a vertically oriented magnetic dipole on a borehole axis is reported. This solution makes possible to process the data of the high-frequency induction logging isoparametric sounding, including negative values of the measured phase difference. The new approximation enables taking into account the variable borehole radius that is of special importance when a highly-conductive drilling mud is used. As the obtained expression is explicit, it can be used for the quick data processing and for solving inverse problems of the borehole geophysics.
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References
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 3–9, July–August, 2006.
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Nikitenko, M.N., Fedorov, A.I. & Epov, M.I. New approximation for a magnetic field of a dipole on a borehole axis. J Min Sci 42, 309–314 (2006). https://doi.org/10.1007/s10913-006-0059-y
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DOI: https://doi.org/10.1007/s10913-006-0059-y