多相流电磁成像测井测量敏感场分析  

Analysis of Sensitivity Field for Electromagnetic Tomogrophy in Multiphase Flow Well Logging

作　　者：赵彦伟[1] 吴锡令[1] 

机构地区：[1]中国石油大学资源与信息学院

出　　处：《电子测量与仪器学报》2007年第6期58-61,共4页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金资助项目(编号:60472019)

摘　　要：在油井多相流电磁成像研究中,测量敏感场的研究是设计测量仪器和图像重建的前提工作。本文根据阵列电极结构和测量电磁场特性,应用有限元求解流体截面的电磁场问题,对于不同介质分布模型,计算电势分布,进而模拟测量敏感场。计算结果表明,在靠近发射电极和测量电极的区域敏感性较强,在弧形区域的中间敏感性较小,同时在接地电极附近存在小的"负敏感"区域,形态上测量敏感场呈马鞍面状分布。The sensitivity field is of great importance for the optimal design of Electromagnetic Tomography （EMT） in multiphase flow well logging tools and images reconstruction. We calculate potential distribution using FEM （Finite Element Method） according to the structure of array electrodes and the characteristic of electromagnetic field section, and then simulate the sensitivity fields of different distribution models. The calculation results present that the sensitivity field has a saddle-shape within the region from transmitting electrode to measuring electrode. It is more sensitive nearby the transmitting and measuring electrodes than in the inner region of the saddle-shape band, and there also exists a ＂negative sensitivity zone＂ nearby the earth electrodes.

关 键 词：多相流 成像测量 油井 敏感场 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]