双侧向电极系测井响应的精确模拟

A Precise Numerical Simulation of DLL Logging Response

杨峰，聂在平．双侧向电极系测井响应的精确模拟．测井技术，１９９７，２１（４）：２６５～２６８虽然双侧向的数值模拟已在公开发表的文献中报道过，但符合测井仪器实际结构精确模拟的数值模拟并未见报道。利用高效的数值模式匹配法，结合表面积分方程分析这种精确模型响应，并将其数值结果与近似模型的数值结果进行比较，从而定量分析了双侧向的Ｂ电极或Ｎ电极在有限远处时对测量的影响，有利于电阻率测井的常规解释。

Yang Feng, Nie Zaiping. Abstract Although numerical simulation of DLL logging response has been reported in literatures, the numerical simulation for the precise model which tallies with the actual configuration of DLL sonde has not been reported. The numerical mode matching (NMM) combined with surface integral equation is used in this paper to analyse the respone of the exact DLL sonde configuration in 2D axisymmetric formation. The results of the exact tool and the approximate tool configuration are found to be qualitatively similar, but some minor quantitative differences do exist. So when the electrode B or N is not infinitely far away, the inflence of sonde configuration on DLL measurement is analysed quantitatively. The analysis result is useful for routine interpretation of resistivity logs.