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方法根据自然电位测井基本原理，提出一种在不知道地层压力、流体粘度、过滤电位系数的条件下，快速识别和求取过滤电位的方法。目的校正自然电位数值，求准地层水电阻率。结果建立了快速识别和求取过滤电位的图版。结论在过滤电位识别图版上，若趋势线过原点则认为无过滤电位；反之．则趋势线在纵坐标上的截距即为过滤电位值。
Methods According to the basic principle of natural potential well logging, a method of rapidly identifying and obtaining the filtration potential without knowing formation pressure, fluid viscosity and filtration potential coefficient was proposed. Purpose To correct the natural potential value and determine the formation water resistivity. The results established a rapid identification and access to the filter potential of the plate. Conclusion in the filter potential recognition plate, if the trend line over the origin point that no filter potential; the other hand. The intercept of the trend line on the ordinate is the filter potential value.