An efficient hybrid model for fractured reservoirs

In this study, an efficient hybrid model is proposed to simulate the fluid flow in the reservoirs with multi-scale fractures, which cannot be easily modeled by neither the continuum models nor the discrete fracture models. In the proposed method, the small fractures are modeled by using an improved...

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Bibliographic Details
Published in:Science China. Technological sciences 2016-10, Vol.59 (10), p.1609-1616
Main Authors: Yan, Xia, Huang, ZhaoQin, Yao, Jun, Li, Yang, Fan, DongYan, Song, WenHui
Format: Article
Language:English
Subjects:
Algorithms
Anisotropy
Continuum modeling
Engineering
Finite difference method
Fluid flow
Fractures
Numerical analysis
Numerical models
Reservoirs
断裂模型
有限差分方法
流体流动
混合模型
结构元素
裂缝性储层
边境地区
连续模型
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Summary:In this study, an efficient hybrid model is proposed to simulate the fluid flow in the reservoirs with multi-scale fractures, which cannot be easily modeled by neither the continuum models nor the discrete fracture models. In the proposed method, the small fractures are modeled by using an improved Multiple Sub-Region method, which can capture the strongly anisotropy of frac- ture elements and the effects of border region on the transmissibility and provide more accurate results, on the other hand, the large fractures are modeled explicitly as major fluid conduits by the Embedded Discrete Fracture Model. Then, an efficient numerical algorithm based on the Mimetic Finite Difference method is developed to solve the hybrid method. At the end, sev- eral numerical examples are carried out to verify the accuracy and applicability of the proposed numerical model.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-016-6104-4