一种基于属性分布的非均匀油藏数值模拟网格优化算法  

A Grid Optimization Algorithm Used in Reservoir Numerical Simulation Based on Grid Attribute Distribution

作　　者：史敬华 刘钰洋[3,4,5] 于金彪[2] 强伟帆 曹伟东[2] 徐睿智 潘懋[3,4,5] 张慧 SHI Jing-hua;LIU Yu-yang;Yu Jin-biao;QIANG Wei-fan;CAO Wei-dong;XU Rui-zhi;PAN Mao;ZHANG Hui(School of Geoscience,Yangtze University,Wuhan 430100,China;Exploration and Development Research Institute of Shengli Oil Field,Sinopec Group,Dongying 257015,China;School of Earth and Space Sciences,Peking University,Beijing 100871,China;The Key Laboratory of Orogenic Belts and Crustal Evolution(MOE),Peking University,Beijing 100871,China;Institute of Oil and Gas,Peking University,Beijing 100871,China;Dongsheng Group of Shengli Oil Field,Sinopec Group,Dongying 257051,China)

机构地区：[1]长江大学地球科学学院,武汉430100 [2]中国石化胜利油田勘探开发研究院,东营257015 [3]北京大学地球与空间科学学院,北京100871 [4]北京大学造山带与构造演化教育部重点实验室,北京100871 [5]北京大学石油与天然气研究中心,北京100871 [6]中国石化胜利油田东胜公司,东营257051

出　　处：《科学技术与工程》2020年第18期7252-7261,共10页Science Technology and Engineering

基　　金：中国石化重大专项(P16035);国家重大科技专项(2017ZX05013-002-002)。

摘　　要：油藏数值模拟是油气田勘探开发的基础,三维地质网格模型是数值模拟的基础数据之一,网格的数量和大小决定了数值模型的精细程度,同时也影响了数值模拟的效率。为了有效保证地质模型的准确性,又可以提高数值模拟的效率,借鉴自适应网格法的思想,提出了一种改进的不均匀网格优化方法。该方法在储层物性非均质性强烈或重点研究区域采用细网格,而在储层物性均质性相对较好的区域采用粗网格,相邻粗、细网格间均匀渐变过渡。首先,设计了网格优化的基本原则;随后,在网格优化基本原则的基础之上,设计并实现了一种改进的不均匀网格优化算法;最后,以陕西省X区油田实例数据对算法的有效性和准确进行了验证。结果表明:该算法可以实现网格的均匀渐变过度,既有效减少了网格数量,又很好的保证了模型的精确度。Reservoir numerical simulation is the basis of oil and gas exploration and development. Three-dimensional geological grid model is one of the basic data of numerical simulation. The number and size of grid determines the precision of numerical model, and also affects the efficiency of numerical simulation. To effectively guarantee the accuracy of geological model and improve the efficiency of numerical simulation, an improved non-uniform mesh optimization method was proposed based on the idea of adaptive mesh method. In the method, fine grids were used for the areas where reservoir physical heterogeneity was strong or key research areas, while coarse grids were used for those where reservoir physical homogeneity was relatively good, and the transition between adjacent coarse and fine grids is uniform and gradual. First, the basic principles of grid optimization were designed. Then, based on the basic principles, an improved non-uniform grid optimization algorithm was designed and implemented. Finally, the applicability and accuracy of the algorithm were tested against the data of an example of an oilfield in Shaanxi Province. Results show that the algorithm can realize the uniform gradient transition of the grid, reduce the number of grids effectively, and guarantee the accuracy of the model.

关 键 词：网格优化算法 优化原则 自适应网格 非均匀优化 

分 类 号：TE343[石油与天然气工程—油气田开发工程]