马尔可夫链-蒙特卡洛法重构三维数字岩心及岩石核磁共振响应数值模拟  

Three dimensional digital cores reconstructed by MCMC method and numerical simulation of rock NMR response

作　　者：郭江峰[1,2,3] 谢然红[1,2,3] 丁业娇 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球探测与信息技术北京市重点实验室,北京102249 [3]中国石油大学(北京)地球物理与信息工程学院,北京102249

出　　处：《中国科技论文》2016年第3期280-285,共6页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20130007110012);国家自然科学基金资助项目(U1262114)

摘　　要：利用马尔可夫链-蒙特卡洛(MCMC)法重构三维数字岩心,并对比数字岩心的统计函数,评价重构数字岩心的准确性;再应用随机游走算法模拟真实数字岩心和重构三维数字岩心的核磁共振(NMR)响应。结果表明:MCMC法重构的三维数字岩心的二维切面与原始二维切面具有相似的结构性质,重构的三维数字岩心比真实岩心孔隙尺寸偏小,均质性略好;MCMC法重构的三维数字岩心微观结构与真实三维数字岩心微观结构相似,可用于NMR响应数值模拟的研究。Three dimensional(3D)digital core was reconstructed by Markov Chain-Monte Carlo(MCMC)method,and the accuracy of reconstructed 3Ddigital core was evaluated by comparison of digital cores' statistical functions.NMR responses of the reconstructed digital core and the real 3Ddigital core were simulated by random walk algorithm.The results show that there are similar structural properties between the sections of reconstructed digital core by the MCMC method and the original two dimensional(2D)thin section,and the reconstructed 3Ddigital core has smaller pore size,but there is a little better homogeneity.Microstructures of reconstructed 3Ddigital core by MCMC method are similar to those of the real digital cores,and the reconstructed digital core can be used in numerical simulation of NMR response.

关 键 词：核磁共振 数字岩心 数值重构 马尔可夫链蒙特卡洛 随机游走 统计函数 

分 类 号：P628[天文地球—地质矿产勘探]