Natural potential baseline correction method

The invention provides a natural potential baseline correction method. The natural potential baseline correction method comprises the following steps: step 1, correcting an abnormal value of a logging curve; step 2, extracting mudstone characteristic values; step 3, generating a correction curve according to the mudstone characteristic values extracted in the step 2; and 4, subtracting the correction curve from the original logging curve to obtain a correction result curve. According to the natural potential baseline correction method, through different response characteristics of sandstone and mudstone on a natural potential curve, mudstone characteristics can be rapidly and accurately extracted by using a mathematical algorithm, a correction curve is generated, then baseline correction is performed, a large amount of time spent on manual correction is saved, and the correction precision is improved. 本发明提供一种自然电位基线校正方法，该自然电位基线校正方法包括：步骤1.对测井曲线异常值进行校正；步骤2.进行泥岩特征值提取；步骤3.根据步骤2中提取的泥岩特征值，生成校正曲线；步骤4，将原始测井曲线减去校正曲线得到校