[1]郭 晨,雷阳艳*,凌博闻.基于正交化方法的页岩裂缝电特性仿真研究[J].计算机技术与发展,2023,33(05):16-21.[doi:10. 3969 / j. issn. 1673-629X. 2023. 05. 003]
　GUO Chen,LEI Yang-yan *,LING Bo-wen.Simulation Research on Electrical Characteristics of Shale Fractures Based on Orthogonalization Method[J].,2023,33(05):16-21.[doi:10. 3969 / j. issn. 1673-629X. 2023. 05. 003]
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基于正交化方法的页岩裂缝电特性仿真研究()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
33
期数:
2023年05期
页码:
16-21
栏目:
分布与并行计算
出版日期:
2023-05-10

文章信息/Info

Title:
Simulation Research on Electrical Characteristics of Shale Fractures Based on Orthogonalization Method
文章编号:
1673-629X(2023)05-0016-06
作者:
郭 晨1 ; 雷阳艳1*; 凌博闻2
1. 长安大学 信息工程学院,陕西 西安 710064;
2. 中国科学院 力学研究所,北京 100190
Author(s):
GUO Chen1 ; LEI Yang-yan1 * ; LING Bo-wen2
1. School of Information Engineering,Chang’an University,Xi’an 710064,China;
2. Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China
关键词:
计算机仿真建模; 电特性; 有限元法; 电学张量; 正交模型
Keywords:
computer simulation modeling; electrical characteristics; FEM; electrical tensor; orthogonal model
分类号:
TP39
DOI:
10. 3969 / j. issn. 1673-629X. 2023. 05. 003
摘要:
页岩储层中富含裂缝网络,是自然和人工综合作用的结果。 现有的预测储层电特性的理论模型大多基于均一介质假设,对非均一介质电特性的预测精度较低,很难应用于裂缝网络密集储层的高精度反演。 基于正交化方法,该文借助计算机仿真技术对二维裂缝网络进行建模。 在保持等效电参数不变的条件下,将复杂裂缝网络结构映射到正交主裂缝和非均一性介质形成的简化正交结构上。 在简化二维裂缝网络计算的同时,正交结构还保留了裂缝网络原有的连通性。 为了验证正交化方法在升尺度中的应用,将裂缝网络分割为若干个区域并依次正交化,得到的正交模型和裂缝网络的电参数值进行对比。 结果分析表明,正交模型的介电参量值与原裂缝网络相差较小,而传统理论模型进行的升尺度获得的结果与原裂缝网络比较相差较大,证实了正交化方法在复杂裂缝网络升尺度中的适用性。 本仿真模拟实验从正交化方法可行性、精度和计算效率等方面研究了其在含裂缝网络储层中的应用前景,展现了正交化方法在页岩储层升尺度和电特性模型构建中的潜力。
Abstract:
Shale reservoirs are rich in fracture networks,which are the result of a combination of natural and artificial interactions. Most ofthe existing theoretical models for predicting the electrical properties of reservoirs are based on the assumption of homogeneous media.The prediction accuracy of the electrical properties of heterogeneous media is low,which is difficult to apply to high-precision inversionof reservoirs with dense fracture networks. Based on the orthogonalization method,we employ computer simulation technology to modelthe two- dimensional fracture network. Under the condition of keeping the equivalent electrical parameters unchanged, the complexfracture network structure is mapped to the simple orthogonal structure formed by the orthogonal main fractures and the heterogeneousmedium. While simplifying the calculation of the two-dimensional fracture network,the orthogonal structure also retains the original connectivity of the fracture network. In order to verify method in upscaling,the fracture network is divided into several regions and orthogonalized in sequence. Then,the application of the orthogonalization obtained orthogonal model is compared with the electrical parametervalues of the fracture network. The error analysis shows that the dielectric parameter values of the orthogonal model are slightly differentfrom the original fracture network. However,the electrical parameter values obtained by the upscaling of the traditional theoretical modelare quite different from the original fracture network. Compared with traditional upscaling method,the results confirm that the orthogonalization method is effective in complex fracture networks. The orthogonalization method has shown great potential in the aspects of its feasibility, accuracy and computational efficiency.
更新日期/Last Update: 2023-05-10