复杂介质环境中梯度电极系测井成像  

Imaging of Lateral Resistivity Measurements in Complex Media.

作　　者：赵延文[1] 聂在平[1] 陈爱新[1] 

机构地区：[1]成都电子科技大学微波工程系

出　　处：《测井技术》1998年第4期237-240,共4页Well Logging Technology

摘　　要：赵延文，聂在平，陈爱新．复杂介质环境中梯度电极系测井成像．测井技术，１９９８，２２（４）：２３７～２４０用变形玻恩迭代法处理了轴对称二维非均匀介质中梯度电极系测井数据的反演问题。在每次迭代过程中，采用了高效数值模式匹配的正演计算方法；利用其半解析的格林函数可半解析地求出格林函数的偏导数，并可以推导出离散非线性积分方程时积分运算的半解析表达式，大大提高了计算速度，改善了成像质量。In this paper, the distorted Born Iterative Method (DBIM) is applied to deal with the nonlinear inversion problem of lateral resistivity measurements in a two dimensional axisymmetric medium. In each iteration of DBIM, an efficient numerical mode matching(NMM) method is used to solve the forward problem. This method provides a semianalytic expression for the Green’s function and its derivatives required in the inversion, and then a semianalytic expression of the integration in the nonlinear integral equation can be derived. Therefore, the computational time is reduced, and the results of inversion are improved.

关 键 词：非均匀介质 梯度电极系 测井数据 电导率 电测井 

分 类 号：P631.811[天文地球—地质矿产勘探]