基于数字岩心电性数值模拟新方法的研究  

New Numerical Simulation Method of Electrical Properties of Rock Based on Digital Cores

作　　者：孔强夫 胡松[1] 王晓畅[1] 李军[1] 熊培祺 王琬[3] 刘秘[2] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石油大学,北京102249 [3]加拿大卡尔加里大学

出　　处：《非常规油气》2016年第5期45-53,共9页Unconventional Oil & Gas

基　　金：国家科技重大专项"不同类型缝洞储集体测井精细评价"(2016ZX05014-002-001)

摘　　要：基于数字岩心的岩石电性数值模拟技术可以弥补传统岩石物理实验的诸多不足,而准确厘定孔隙空间流体分布是电性数值模拟的基础。在对常用模拟方法进行了系统阐述的基础上,分析了利用孔隙网络模型、数学形态学及与其他模拟方法结合开展电性数值模拟研究的优缺点,同时提出了将数学形态学与随机游走结合的新方法,并在图像分析基础上提出利用"等效"处理办法表征水膜。在考虑了数字岩心的连通性、各向异性、水膜等因素的基础上,对高孔、高渗砂岩岩心进行了数字模拟,模拟结果与理论计算结果吻合较好,证实了新方法的可行性,为进一步开展电性数值模拟研究奠定了基础。Based on the digital core, rock electrical numerical simulation technology can make up for the deficiencies of traditional rock physics experiment. Determining the fluid distribution in the pore accurately is the basis of the numerical simulation of the electrical. After carry out a wide range of literature research for the various methods, the advantages and disadvantages of combining pore-network model or mathematical morphology with other simulation methods to do the electri- cal numerical simulation research are analyzed. A new method that combined mathematical morphology with random walk was been put forward, and on the basis of image analysis, method of ＂equivalent treatment＂ was to characterize water- film. Connectivity of digital core, anisotropy, water film and other factors were considered, the simulation results of core with high porosity-permeability was match well with the experiment, which confirmed the feasibility of new method, laid a foundation for the electrical digital simulation study.

关 键 词：数字岩心 电性数值模拟 数学形态学 随机游走 

分 类 号：P631.3[天文地球—地质矿产勘探]