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为了解决电阻率测井仪的纵向分辨率和径向探测深度的矛盾,介绍了一种新型的高分辨率组合侧向电极系,并对其测井响应及性能进行了高效数值模拟。数值模式匹配方法(NMM)是一种解析—数值混合方法,它使非均匀介质中的场的二维数值分析简化为一维数值分析和另一维的解析递推,从而大大降低了数值计算量。利用NMM 求解非均匀介质的位场格林函数。其次基于该电极系的构成及工作原理,用表面积分方程来匹配电极系的激励条件和边界条件,从而圆满地解决了复杂介质中位场的分析。数值模拟结果表明该电极系具有很高的纵向分辨率,同时也具有较深的径向探测深度,适合于薄层探测应用。
In order to solve the contradiction between the vertical resolution and the depth of resistivity tool, a new type of high resolution lateral electrode system is introduced and its logging response and performance are numerically simulated. The numerical pattern matching method (NMM) is an analytic-numerical hybrid method that simplifies two-dimensional numerical analysis of a field in a non-homogeneous medium to one-dimensional numerical analysis and analytic recursion in another dimension, greatly reducing numerical computations the amount. Use of NMM to solve the potential field Green’s function of inhomogeneous media. Secondly, based on the structure and working principle of the electrode system, the surface integral equation is used to match the excitation and boundary conditions of the electrode system, so that the analysis of the potential field in the complex medium can be satisfactorily solved. The numerical simulation results show that the electrode system has a high vertical resolution, but also has a deep radial depth of detection, suitable for thin-layer detection applications.