两相流电磁成像测量正演模拟分析  

Analysis of Forward Modeling on Electromagnetic Tomography of Two-phase Flow

作　　者：王晓星[1] 吴锡令[1] 

机构地区：[1]中国石油大学资源与信息学院,北京102249

出　　处：《测井技术》2007年第5期430-432,共3页Well Logging Technology

基　　金：国家自然科学基金资助项目(项目编号60472019)

摘　　要：应用有限元方法对两相流动电磁成像测量进行正演仿真,模拟不同测量组合下各种流型的电势分布,并简单考察了电极数目和电极尺寸对电势分布的影响,然后模拟6种典型测量敏感场。仿真结果表明,介质分布不同是影响电势分布差异的根本原因,电极数目对测量结果影响很小,电极尺寸的影响较大,敏感场分布不均匀,不对称,且存在负值。正演模拟的结果为仪器优化设计和下一步图像重构奠定基础。Electromagnetic tomography of two-phase flow is forward simulated by finite element method （FEM） to model potential distribution in different flow types and measuring combinations, meantime, influences of amount and size of electrodes to the potential distribution are sought simply, then 6 kinds of typical sensitive fields are simulated. The results show that potential distribution is mainly affected by distribution of the mediums, the influence of the amount of electrodes is weak, while the influence of electrode size is greater. The sensitive field is non-hom- ogeneous and unsymmetrical, having some negative values. The forward simulation results are useful for transducer optimal design and image reconstruction.

关 键 词：电磁成像测量 正演模拟 电势分布 敏感场 

分 类 号：P631.32[天文地球—地质矿产勘探] TP212.1[天文地球—地质学]