Numerical Study of Reactive Flow in Fractured Carbonate Rock

Acidizing technology is an effective reformation method of oil and gas reservoirs. It can also remove the reservoir pollution near wellbore zones and enhance the fluid transmissibility. The optimal injection rate of acid is one of the key factors to reduce cost and improve the effect of acidizing. T...

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Autores principales:	Xu Zhou, Qingfu Zhang, Hongchuan Xing, Jianrong Lv, Haibin Su, Zhaoqin Huang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	fractured carbonate rock two-scale model the discrete fracture model reactive flow numerical simulation Science Q
Acceso en línea:	https://doaj.org/article/d673f4980b544d5a859d5ddb16cb98a2
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id	oai:doaj.org-article:d673f4980b544d5a859d5ddb16cb98a2
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spelling	oai:doaj.org-article:d673f4980b544d5a859d5ddb16cb98a22021-11-17T11:23:10ZNumerical Study of Reactive Flow in Fractured Carbonate Rock2296-646310.3389/feart.2021.765139https://doaj.org/article/d673f4980b544d5a859d5ddb16cb98a22021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.765139/fullhttps://doaj.org/toc/2296-6463Acidizing technology is an effective reformation method of oil and gas reservoirs. It can also remove the reservoir pollution near wellbore zones and enhance the fluid transmissibility. The optimal injection rate of acid is one of the key factors to reduce cost and improve the effect of acidizing. Therefore, the key issue is to find the optimal injection rate during acid corrosion in fractured carbonate rock. In this work, a novel reactive flow mathematical model based on two-scale model and discrete fracture model is established for fractured carbonate reservoirs. The matrix and fracture are described by a two-scale model and a discrete fracture model, respectively. Firstly, the two-scale model for matrix is combined with the discrete fracture model. Then, an efficient numerical scheme based on the finite element method is implemented to solve the corresponding dimensionless equations. Finally, several important aspects, such as the influence of the injection rate of acid on the dissolution patterns, the influence of fracture aperture and fracture orientations on the dissolution structure, the breakthrough volume of injected acid, and the dynamic change of fracture aperture during acidizing, are analyzed. The numerical simulation results show that there is an optimal injection rate in fractured carbonate rock. However, the fractures do not have an impact on the optimal acid injection rate, they only have an impact on the dissolution structure.Xu ZhouXu ZhouQingfu ZhangHongchuan XingJianrong LvHaibin SuZhaoqin HuangFrontiers Media S.A.articlefractured carbonate rocktwo-scale modelthe discrete fracture modelreactive flownumerical simulationScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fractured carbonate rock two-scale model the discrete fracture model reactive flow numerical simulation Science Q
spellingShingle	fractured carbonate rock two-scale model the discrete fracture model reactive flow numerical simulation Science Q Xu Zhou Xu Zhou Qingfu Zhang Hongchuan Xing Jianrong Lv Haibin Su Zhaoqin Huang Numerical Study of Reactive Flow in Fractured Carbonate Rock
description	Acidizing technology is an effective reformation method of oil and gas reservoirs. It can also remove the reservoir pollution near wellbore zones and enhance the fluid transmissibility. The optimal injection rate of acid is one of the key factors to reduce cost and improve the effect of acidizing. Therefore, the key issue is to find the optimal injection rate during acid corrosion in fractured carbonate rock. In this work, a novel reactive flow mathematical model based on two-scale model and discrete fracture model is established for fractured carbonate reservoirs. The matrix and fracture are described by a two-scale model and a discrete fracture model, respectively. Firstly, the two-scale model for matrix is combined with the discrete fracture model. Then, an efficient numerical scheme based on the finite element method is implemented to solve the corresponding dimensionless equations. Finally, several important aspects, such as the influence of the injection rate of acid on the dissolution patterns, the influence of fracture aperture and fracture orientations on the dissolution structure, the breakthrough volume of injected acid, and the dynamic change of fracture aperture during acidizing, are analyzed. The numerical simulation results show that there is an optimal injection rate in fractured carbonate rock. However, the fractures do not have an impact on the optimal acid injection rate, they only have an impact on the dissolution structure.
format	article
author	Xu Zhou Xu Zhou Qingfu Zhang Hongchuan Xing Jianrong Lv Haibin Su Zhaoqin Huang
author_facet	Xu Zhou Xu Zhou Qingfu Zhang Hongchuan Xing Jianrong Lv Haibin Su Zhaoqin Huang
author_sort	Xu Zhou
title	Numerical Study of Reactive Flow in Fractured Carbonate Rock
title_short	Numerical Study of Reactive Flow in Fractured Carbonate Rock
title_full	Numerical Study of Reactive Flow in Fractured Carbonate Rock
title_fullStr	Numerical Study of Reactive Flow in Fractured Carbonate Rock
title_full_unstemmed	Numerical Study of Reactive Flow in Fractured Carbonate Rock
title_sort	numerical study of reactive flow in fractured carbonate rock
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/d673f4980b544d5a859d5ddb16cb98a2
work_keys_str_mv	AT xuzhou numericalstudyofreactiveflowinfracturedcarbonaterock AT xuzhou numericalstudyofreactiveflowinfracturedcarbonaterock AT qingfuzhang numericalstudyofreactiveflowinfracturedcarbonaterock AT hongchuanxing numericalstudyofreactiveflowinfracturedcarbonaterock AT jianronglv numericalstudyofreactiveflowinfracturedcarbonaterock AT haibinsu numericalstudyofreactiveflowinfracturedcarbonaterock AT zhaoqinhuang numericalstudyofreactiveflowinfracturedcarbonaterock
_version_	1718425639105593344

Numerical Study of Reactive Flow in Fractured Carbonate Rock

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