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MULTI-COMPONENT INDUCTION LOGGING SYSTEMS AND METHODS USING SELECTED FREQUENCY INVERSION
MULTI-COMPONENT INDUCTION LOGGING SYSTEMS AND METHODS USING SELECTED FREQUENCY INVERSION
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机译:使用选定频率反演的多分量感应测井系统和方法
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摘要
Formation properties may be more efficiently derived from measurements of multi-frequency, multi-component array induction tools, by emphasizing the measurements associated with shorter spacings/lower frequencies in certain regions and short-to-middle spacings/higher frequencies in other regions. In at least one embodiment, a disclosed logging system includes a logging tool that when conveyed along a borehole through a formation obtains multi-component transmit-receive antenna coupling measurements with multiple arrays having different antenna spacings; and a processing system that operates on the measurements. The processing system derives from said measurements one or more formation parameter estimates; determines measurement weight coefficients for a cost function based on said one or more formation parameter estimates; and inverts said measurements with said cost function to obtain one or more enhanced parameter estimates.
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