A computationally efficient model for fracture propagation and fluid flow in naturally fractured reservoirs

2区工程技术 Q1 Earth and Planetary Sciences

Journal of Petroleum Science and Engineering Pub Date : 2023-01-01 DOI:10.1016/j.petrol.2022.111249

Meng Cao, Mukul M. Sharma

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引用次数: 0

Abstract

There is a need to develop computationally efficient models for oil and gas production from naturally fractured reservoirs. In this paper, we present an efficient, integrated fracturing-production simulator by combining a boundary element method (for fracture propagation) and a general Green's function solution (for fluid flow) that eliminates the need to discretize the matrix domain. First, the model is validated against analytical solutions and then compared with a fully numerical model. A comparison of results and computation time shows that our simulator significantly reduces the computation cost without any significant loss in accuracy. The simulator is then applied to investigate the effect of cluster spacing and pumping schedule on production from a hydraulically fractured horizontal well in a naturally fractured reservoir. The results show an optimal cluster spacing that can maximize the contact area between fractures and reservoirs while maintaining the highest production rate. Based on the chosen optimal cluster spacing, we observe that changes in the pumping schedule can have an impact on the production rate due to changes in the created fracture network.

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天然裂缝油藏中裂缝扩展和流体流动的计算高效模型

有必要为天然裂缝油藏的石油和天然气生产开发计算高效的模型。在本文中，我们通过将边界元法（用于裂缝扩展）和通用格林函数解（用于流体流动）相结合，提出了一种高效、集成的压裂生产模拟器，该模拟器无需离散矩阵域。首先，根据解析解对模型进行验证，然后与全数值模型进行比较。结果和计算时间的比较表明，我们的模拟器在没有任何显著精度损失的情况下显著降低了计算成本。然后，将该模拟器应用于研究自然裂缝油藏中水力裂缝水平井的丛间距和泵送时间表对产量的影响。结果表明，最佳的聚类间距可以最大限度地扩大裂缝和储层之间的接触面积，同时保持最高的生产率。基于所选择的最佳集群间距，我们观察到，由于所创建的裂缝网络的变化，泵送计划的变化可能会对生产率产生影响。

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

Journal of Petroleum Science and Engineering 工程技术-地球科学综合

CiteScore

11.30

自引率

0.00%

发文量

1511

审稿时长

13.5 months

期刊介绍： The objective of the Journal of Petroleum Science and Engineering is to bridge the gap between the engineering, the geology and the science of petroleum and natural gas by publishing explicitly written articles intelligible to scientists and engineers working in any field of petroleum engineering, natural gas engineering and petroleum (natural gas) geology. An attempt is made in all issues to balance the subject matter and to appeal to a broad readership. The Journal of Petroleum Science and Engineering covers the fields of petroleum (and natural gas) exploration, production and flow in its broadest possible sense. Topics include: origin and accumulation of petroleum and natural gas; petroleum geochemistry; reservoir engineering; reservoir simulation; rock mechanics; petrophysics; pore-level phenomena; well logging, testing and evaluation; mathematical modelling; enhanced oil and gas recovery; petroleum geology; compaction/diagenesis; petroleum economics; drilling and drilling fluids; thermodynamics and phase behavior; fluid mechanics; multi-phase flow in porous media; production engineering; formation evaluation; exploration methods; CO2 Sequestration in geological formations/sub-surface; management and development of unconventional resources such as heavy oil and bitumen, tight oil and liquid rich shales.