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根据自然电动势的形成机理建立了二维轴对称非均匀介质中自然电位测井的分析模型，利用数值模式匹配（ＮＭＭ）理论与表面积分方程法相结合对自然电位测井响应进行了严格的数值模拟，并定量考察了诸如地层水和泥浆滤液含盐浓度、地层厚度、井径、侵入带等因素对自然电位测井响应的影响。自然电位测井数值模拟的实现必将为测井解释提供依据，对实际测井工程有指导作用。
According to the formation mechanism of natural electromotive force, the analytical model of natural potential well logging in two-dimensional axisymmetric inhomogeneous media was established. The numerical simulation of natural potential well logging was carried out by using numerical model matching (NMM) theory and surface integral equation method , And quantitatively investigated the effects of factors such as salt concentration in formation water and mud filtrate, formation thickness, borehole diameter, intrusion zone on natural potential well logging response. The realization of numerical simulation of natural potential logging will surely provide the basis for logging interpretation, which will guide the actual logging engineering.