Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures

Aiming at improving the acid fracturing effect of carbonate reservoirs at high temperatures, reaction kinetics and acid fracture conductivity of five high-temperature sustained-release acids were investigated. The experimental results show that viscous acid, gelled acid II, authigenic acid I, and ge...

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Main Authors: Sui, Yu, Cao, Guangsheng, Guo, Tianyue, Zhang, Zihang, Bai, Yujie, Wu, Jiajun, Yao, Liming
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/163648
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1636482022-12-13T05:33:38Z Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures Sui, Yu Cao, Guangsheng Guo, Tianyue Zhang, Zihang Bai, Yujie Wu, Jiajun Yao, Liming School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering High-Temperature Sustained-Release Acid Reaction Kinetics Aiming at improving the acid fracturing effect of carbonate reservoirs at high temperatures, reaction kinetics and acid fracture conductivity of five high-temperature sustained-release acids were investigated. The experimental results show that viscous acid, gelled acid II, authigenic acid I, and gelled acid I have the highest rate constant, respectively. It was found that as the temperature increases, the reaction order of gelled acid I, viscous acid, and authigenic acid II decreases, while the reaction order of gelled acid II and authigenic acid I increase first and then decreases. Among the studied cases, the maximum reaction rate is 4.46 × 10-5 mol/(L·s), which was achieved in gelled acid I. Variations of the reaction rate indicate that gelled acid I is in the "saturation state of the reaction''. At a closing pressure of 40 MPa and a temperature of 150 °C, the acid corrosion fracture conductivity of gelled acid I is the largest, reaching 7.45 × 10-2 μm2 m, the fracture conductivity of authigenic acid I was higher than that of autogenic acid II, and the conductivity of the viscous acid was the lowest. Published version 2022-12-13T05:33:37Z 2022-12-13T05:33:37Z 2022 Journal Article Sui, Y., Cao, G., Guo, T., Zhang, Z., Bai, Y., Wu, J. & Yao, L. (2022). Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures. Case Studies in Thermal Engineering, 38, 102336-. https://dx.doi.org/10.1016/j.csite.2022.102336 2214-157X https://hdl.handle.net/10356/163648 10.1016/j.csite.2022.102336 2-s2.0-85136961534 38 102336 en Case Studies in Thermal Engineering © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
High-Temperature Sustained-Release Acid
Reaction Kinetics
spellingShingle Engineering::Mechanical engineering
High-Temperature Sustained-Release Acid
Reaction Kinetics
Sui, Yu
Cao, Guangsheng
Guo, Tianyue
Zhang, Zihang
Bai, Yujie
Wu, Jiajun
Yao, Liming
Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures
description Aiming at improving the acid fracturing effect of carbonate reservoirs at high temperatures, reaction kinetics and acid fracture conductivity of five high-temperature sustained-release acids were investigated. The experimental results show that viscous acid, gelled acid II, authigenic acid I, and gelled acid I have the highest rate constant, respectively. It was found that as the temperature increases, the reaction order of gelled acid I, viscous acid, and authigenic acid II decreases, while the reaction order of gelled acid II and authigenic acid I increase first and then decreases. Among the studied cases, the maximum reaction rate is 4.46 × 10-5 mol/(L·s), which was achieved in gelled acid I. Variations of the reaction rate indicate that gelled acid I is in the "saturation state of the reaction''. At a closing pressure of 40 MPa and a temperature of 150 °C, the acid corrosion fracture conductivity of gelled acid I is the largest, reaching 7.45 × 10-2 μm2 m, the fracture conductivity of authigenic acid I was higher than that of autogenic acid II, and the conductivity of the viscous acid was the lowest.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Sui, Yu
Cao, Guangsheng
Guo, Tianyue
Zhang, Zihang
Bai, Yujie
Wu, Jiajun
Yao, Liming
format Article
author Sui, Yu
Cao, Guangsheng
Guo, Tianyue
Zhang, Zihang
Bai, Yujie
Wu, Jiajun
Yao, Liming
author_sort Sui, Yu
title Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures
title_short Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures
title_full Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures
title_fullStr Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures
title_full_unstemmed Evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures
title_sort evaluation of deep penetration of high-temperature sustained-release acid based on the reaction kinetics and conductivity of acid-etched fractures
publishDate 2022
url https://hdl.handle.net/10356/163648
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