石油勘探电磁层析成像在复杂岩层的应用仿真  

Simulation of Application of Electromagnetic Tomography on Complex Stratum in Petroleum Exploration

作　　者：张志美[1,2] 王旭[1] 宣杨[1] 何燕[2] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819 [2]沈阳师范大学物理科学与技术学院,辽宁沈阳110034

出　　处：《计算机仿真》2014年第9期407-410,共4页Computer Simulation

基　　金：辽宁省教育厅科学技术研究项目(L2012391)

摘　　要：对石油岩层进行勘探时,是通过电磁波形成稳定图像,对石油岩层进行勘探。由于石油区域的岩层结构密集和稀松部分分布不均匀,电磁层析成像在分布不均匀的岩石结构中,电磁波回波过程发生不定衰减,导致电磁析图像发生局部变异。传统的石油勘探电磁层析成像技术在图像局部变异下,会严重影响后期的成像效果,成像信息失真明显。提出采用加权小波分析的石油勘探中电磁层析成像复杂结构声波过滤方法。用非线性方程描述所有的石油勘探中电磁层析成像结构声波,选取一组成像信号作为样本数据,计算成像信号的权重,获取所有成像信号在声波过滤过程中的重要程度。针对上述结果进行小波变换处理,完成成像信号的分解,将所有的因子进行重构,实现声波过滤。实验结果表明,利用改进算法进行石油勘探中电磁层析成像复杂结构声波过滤,能够极大的提高过滤准确性,得到清晰的成像信号。In this paper, an acoustic wave filtering method for the complex strucare of electromagnetic tomography in petroleum exploration was proposed based on weighted wavelet analysis. Nonlinear equation was used to describe all of the structural acoustic waves of electromagnetic tomography in petroleum exploration, a set of imaging signal was selected as the sample data, and the weight of imaging signal was calculated so as to get all the imaging sig- nal＇ s degrees of importance in the process of in acoustic wave filtering. The wavelet transform for the above results was processed to complete imaging signal decomposition and all the factors were restricted to realize acoustic wave filtering. Experimental results show that using the improved algorithm for complex structures＇ acoustic wave filtering of electromagnetic tomography in petroleum exploration, can greatly improve the filtering accuracy and get clearer imaging signal.

关 键 词：石油勘探 声波过滤 成像信号 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]