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A Numerical Modelling Method of Fractured Reservoirs with Embedded Meshes and Topological Fracture Projection Configurations

Xiang Rao1,2,*, Yina Liu1,2

1 Cooperative Innovation Center of Unconventional Oil and Gas (Ministry of Education & Hubei Province), Yangtze University, Wuhan, China
2 School of Petroleum Engineering, Yangtze University, Wuhan, China

* Corresponding Authors: Xiang Rao. Emails: email; email

Computer Modeling in Engineering & Sciences 2022, 131(3), 1403-1429. https://doi.org/10.32604/cmes.2022.018879

Abstract

Projection-based embedded discrete fracture model (pEDFM) is an effective numerical model to handle the flow in fractured reservoirs, with high efficiency and strong generalization of flow models. However, this paper points out that pEDFM fails to handle flow barriers in most cases, and identifies the physical projection configuration of fractures is a key step in pEDFM. This paper presents and proves the equivalence theorem, which explains the geometric nature of physical projection configurations of fractures, that is, the projection configuration of a fracture being physical is equivalent to it being topologically homeomorphic to the fracture, by analyzing the essence of pEDFM. Physical projection configurations of fractures may be rigorously established based on this theorem, allowing pEDFM to obtain physical numerical results for many flow models, particularly those with flow barriers. Furthermore, a natural idea emerges of employing flow barriers to flexibly ‘cut’ the formation to quickly handle the flow problems in the formation with complex geological conditions, and several numerical examples are implemented to test this idea and application of the improved pEDFM.

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Cite This Article

APA Style
Rao, X., Liu, Y. (2022). A numerical modelling method of fractured reservoirs with embedded meshes and topological fracture projection configurations. Computer Modeling in Engineering & Sciences, 131(3), 1403-1429. https://doi.org/10.32604/cmes.2022.018879
Vancouver Style
Rao X, Liu Y. A numerical modelling method of fractured reservoirs with embedded meshes and topological fracture projection configurations. Comput Model Eng Sci. 2022;131(3):1403-1429 https://doi.org/10.32604/cmes.2022.018879
IEEE Style
X. Rao and Y. Liu, "A Numerical Modelling Method of Fractured Reservoirs with Embedded Meshes and Topological Fracture Projection Configurations," Comput. Model. Eng. Sci., vol. 131, no. 3, pp. 1403-1429. 2022. https://doi.org/10.32604/cmes.2022.018879



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