一种高分辨率组合侧向电极系及其性能分析  

Numerical analysis of a high resolution multi electrodes laterolog tool

作　　者：聂在平[1] 杨峰[1] 曾昭光[2] 杨永根[2] 卢涛[2] 

机构地区：[1]电子科技大学微波工程系,成都610054 [2]中国海洋石油测井公司,北京101149

出　　处：《电波科学学报》1999年第3期254-260,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金

摘　　要：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 this paper, a new idea about the design of the combined lateral logging tool with high resolution has been presented.The numerical eigenmodes for one dimension are first obtained and the Green's function for potential in the two dimension in homogeneous (axisymmetric) media is then deduced by using numerical mode matching(NMM) method.With the Green's function of potential and the surface integration equations,complex source problems have been modeled and solved.The numerical simulation has shown that this tool has superior vertical resolution and deeper radial probing depth than traditional dual laterolog tool therefore is very good for thin beds probing.The computation speed of the NMM program is much higher than the finite element method(FEM), and can be efficiantly used for begging interpretation.

关 键 词：数值模式匹配 数值分析 侧向测井 电阻率测井仪 

分 类 号：P631.81[天文地球—地质矿产勘探]