Abstract：
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.
2025, Vol. 22 
