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<p>This study discusses the challenges in logging the evaluation of low-resistivity oil reservoirs, especially the difficult problems involving their saturation calculation. A correction method for equivalent water conductivity is proposed, given the high conductivity caused by small amounts of water distributed in a network within the low-resistivity reservoir, which mimics the effects of high water saturation. This approach significantly improves the accuracy of hydrocarbon saturation calculations in these low-resistivity reservoirs. The corrected hydrocarbon saturation values highly matched the porosity and are consistent with experimental results. This study also establishes a discrimination process to determine whether corrections are required, verifying the effectiveness and accuracy of the method through an application example.</p>

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Saturation correction and efficient discrimination methods for low-resistivity sandstone oil reservoirs

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Li-zuan Jin

摘要

This study discusses the challenges in logging the evaluation of low-resistivity oil reservoirs, especially the difficult problems involving their saturation calculation. A correction method for equivalent water conductivity is proposed, given the high conductivity caused by small amounts of water distributed in a network within the low-resistivity reservoir, which mimics the effects of high water saturation. This approach significantly improves the accuracy of hydrocarbon saturation calculations in these low-resistivity reservoirs. The corrected hydrocarbon saturation values highly matched the porosity and are consistent with experimental results. This study also establishes a discrimination process to determine whether corrections are required, verifying the effectiveness and accuracy of the method through an application example.