基于非常快速模拟退火法的页岩岩心双重区域重构方法  

Reconstruction of shale with dual-region based on very fast simulated annealing algorithm

作　　者：邹孟飞 隋微波[1] 王旭东[1] 张爽[1] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249

出　　处：《油气地质与采收率》2015年第5期117-122,共6页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金青年基金项目"页岩气藏流体运移机理与渗流参数表征方法研究"(51104116)

摘　　要：页岩储层微观结构在储层开发评价和渗流机理研究方面的重要性日益凸显。但是页岩储层具有低孔、特低渗透、强非均质性和各向异性等特征,应用常规物理实验方法在研究微观渗流方面存在明显的局限性。数字岩心技术已成为研究储层微观结构的重要方法之一,重构方法有其较好的准确性和可靠性。以真实页岩岩心扫描电镜二维图像为基础,利用软件对图像进行分析和数据提取,应用传统模拟退火法重构页岩岩心。针对重构中的问题总结出基于非常快速模拟退火法和双重区域的页岩岩心重构方法。通过改进算法,大幅度的提高重构速度;针对页岩孔隙分布特征,对页岩进行分区域重构,使重构结果更加接近真实页岩岩心。The importance of shale reservoir microstructure on field appraisal and flow mechanism has become increasingly prominent. But microscopic flow of shale reservoir cannot be studied effectively by conventional laboratory experiments and approaches for the unique characteristics of extra-low permeability,low porosity,serious anisotropy and heterogeneity. Digital core technology has become an important method in studying reservoir microstructure. Reconstruction methods have the accuracy and reliability. Shale core has been reconstructed by using traditional simulated annealing method based on the real shale SEM 2D images and data extracted by software. In order to solve the problem in reconstruction,an approach based on dual-region strategy and very fast simulated annealing(VFSA)algorithm is proposed in this paper. Using the new algorithm makes a significant improvement of computing efficiency. The shale is reconstructed in dual-region due to the pore distribution characteristics of shale. The results show that real pore distribution features are characterized better by this new approach.

关 键 词：数字岩心重构 页岩 双重区域 非常快速模拟退火法 模拟退火法 

分 类 号：TE125.1[石油与天然气工程—油气勘探]