An efficient coupled fluid flow-geomechanics model for capturing the dynamic behavior of fracture systems in tight porous media

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Analysis with Boundary Elements Pub Date : 2024-11-29 DOI:10.1016/j.enganabound.2024.106046

Xulin Du , Linsong Cheng , Maojun Fang , Xiang Rao , Sidong Fang , Renyi Cao

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引用次数: 0

Abstract

This paper introduces an efficient hybrid numerical discretization method designed to address the coupled mechanical challenges of geomechanics and fluid flow during pressure depletion in tight reservoirs. Utilizing the extended finite element method, this approach solves the elastic deformation of rock, while the mixed boundary element method precisely calculates the unsteady fluid exchange between the matrix and fractures. These numerical schemes are integrated fully, with temporal dynamics managed through a fully implicit method that effectively characterizes fracture deformation and fluid flow in hydrocarbon development. Furthermore, this model incorporates embedded pre-treatment to represent hydraulic macro-fractures and considers the effects of proppant. It captures dynamic information regarding the matrix and minor natural fractures through the double-porosity effective stress principle and a dual-medium implicit fracture characterization method. Thus, the proposed hybrid model provides a comprehensive depiction of the complex interplay between the matrix, natural fractures, and hydraulic fractures. The model's accuracy is validated through various examples, highlighting its reliability. This research offers valuable theoretical insights for advancing the development of unconventional hydrocarbon resources.

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一种有效的流体流动-地质力学耦合模型，用于捕获致密多孔介质中裂缝系统的动态行为

本文介绍了一种有效的混合数值离散化方法，旨在解决致密储层压力耗尽过程中地质力学和流体流动的耦合力学挑战。该方法利用扩展有限元法求解岩石的弹性变形，而混合边界元法则精确计算基质与裂缝之间的非定常流体交换。这些数值格式完全集成，并通过完全隐式方法管理时间动力学，有效表征油气开发过程中的裂缝变形和流体流动。此外，该模型还考虑了支撑剂的影响，采用了嵌入的预处理方法来表示水力宏观裂缝。该方法通过双孔隙度有效应力原理和双介质隐式裂缝表征方法获取基质和天然小裂缝的动态信息。因此，所提出的混合模型提供了基质、天然裂缝和水力裂缝之间复杂相互作用的综合描述。通过实例验证了模型的准确性，突出了模型的可靠性。该研究为推进非常规油气资源开发提供了有价值的理论见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Analysis with Boundary Elements 工程技术-工程：综合

CiteScore

5.50

自引率

18.20%

发文量

368

审稿时长

56 days

期刊介绍： This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods. Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness. The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields. In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research. The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods Fields Covered: • Boundary Element Methods (BEM) • Mesh Reduction Methods (MRM) • Meshless Methods • Integral Equations • Applications of BEM/MRM in Engineering • Numerical Methods related to BEM/MRM • Computational Techniques • Combination of Different Methods • Advanced Formulations.