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DOI | 10.1029/2020WR029537 |
Mathematical Modeling and Numerical Simulation of Water-Rock Interaction in Shale under Fracturing-fluid Flowback Conditions | |
Qiaoyun Chen; Fei Wang | |
2021-07-28 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Water-rock interaction cannot be ignored for shale reservoirs with high salinity formation brine and complex rock composition, and stimulated by massive slick-water fracturing treatment. However, there have been few studies on the flowback model fully coupled with different effects of water-rock interaction. This paper presents the development of a coupled hydro-chemical-mechanical model for modeling water-rock interaction in fractured shale during the post-fracturing flowback period. The model considers distinguishing water-rock interaction phenomena, i.e. mineral dissolution, clay swelling and chemical osmosis, and accounts for multi-phase flow in a slick-water fractured shale reservoir. The coupling and solution method and a numerical simulator were developed. Numerical simulation indicates that the swelling volume of clay minerals occupies the pores and leads to a decline in matrix porosity, while mineral dissolution increases both the matrix porosity and the solute concentration in the aqueous phase in matrix pores. Clay swelling mainly affects the shape of the porosity ratio profiles. The effect of mineral dissolution becomes increasingly stronger as flowback progresses. Mineral dissolution mainly affects the relative positions of the porosity ratio curves with the progress of flowback. Water-rock interaction coupled flowback modeling and numerical simulation results in this study quantify the effects of chemical osmosis, clay swelling and mineral dissolution. Results from this study provide new insights into the mechanisms of fracturing-fluid flowback and value to flowback transient analysis. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/335343 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Qiaoyun Chen,Fei Wang. Mathematical Modeling and Numerical Simulation of Water-Rock Interaction in Shale under Fracturing-fluid Flowback Conditions[J]. Water Resources Research,2021. |
APA | Qiaoyun Chen,&Fei Wang.(2021).Mathematical Modeling and Numerical Simulation of Water-Rock Interaction in Shale under Fracturing-fluid Flowback Conditions.Water Resources Research. |
MLA | Qiaoyun Chen,et al."Mathematical Modeling and Numerical Simulation of Water-Rock Interaction in Shale under Fracturing-fluid Flowback Conditions".Water Resources Research (2021). |
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