Insights into the Multiscale Conductivity Mechanism of Marine Shales from Wufeng–Longmaxi Formation in the Southern Sichuan Basin of China

Gas-bearing capacity is an important feature in the evaluation of different properties shale. The calculation adsorbed gas and free content focus shale gas-bearing evaluation, for which saturation a key parameter. In present study, target area was marine shales Wufeng–Longmaxi Formation Dingshan, Jiaoshiba, Changning areas southern Sichuan Basin China, while purpose study more effective characterization Langmuir’s volume pressure using well-logging data. application new technologies seldom studied, conventional sand-mudstone models calculate with low accuracy. Therefore, this systematically analyzed conductivity mechanism, laid foundation model saturation. analysis results influencing factors showed that resistivity interlayer mainly affected by thin low-resistivity layers, laminates clay minerals, pyrite, overmature conductive organic matter, pore fluids. Moreover, further clarified main controlling mechanism implementing multiscale analysis. Herein, on meter-scale, influence layers characterized based horizontal model; centimeter-scale, fluids investigated rock electrical experiments; nanometer-scale, materials examined digital technology numerical simulation properties. affecting shale, from strongest to weakest, are layer, mineral, water, respectively.