Synthesis and performance evaluation of a novel high-temperature-resistant thickener

Successful exploitation of carbonate reservoirs relies on the acid-fracturing process, while the thickeners used in this process play a key role. It is a common engineering problem that thickeners usually fail to function when used in high-temperature environments. Until now, no research has venture...

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Main Authors: Sui, Yu, Guo, Tianyue, Li, Dan, Guo, Da, Zhang, Zhiqiu, Cao, Guangsheng
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/174012
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1740122024-03-16T16:48:08Z Synthesis and performance evaluation of a novel high-temperature-resistant thickener Sui, Yu Guo, Tianyue Li, Dan Guo, Da Zhang, Zhiqiu Cao, Guangsheng School of Mechanical and Aerospace Engineering Engineering Carbonate reservoir Temperature stability Successful exploitation of carbonate reservoirs relies on the acid-fracturing process, while the thickeners used in this process play a key role. It is a common engineering problem that thickeners usually fail to function when used in high-temperature environments. Until now, no research has ventured into the field of synthesizing thickeners which can be effectively used at ultra-high temperatures up to 180 °C. In our current study, a novel high-temperature-resistant polyacrylamide thickener named SYGT has been developed. The thermal gravimetric analysis (TGA) reveals that SYGT is capable of withstanding temperatures of up to 300 °C. Both our scanning electron microscopy (SEM) and rheological analysis demonstrate that the SYGT exhibits excellent resistance to both temperature and shear. At 180 °C, the viscosity of the SYGT aqueous solution is no lower than 61.7 mPa·s at a 20% H+ concentration or high salt concentration, and the fracture conductivity of the thickened acid reaches 6 D·cm. For the first time, the influence of the polymer spatial network's structural parameters on the viscosity of polymer solutions has been evaluated quantitatively. It was discovered that the length and surrounding area of the SNS skeleton have a synergistic effect on the viscosity of the polymer solution. Our experiments show that SYGT effectively reduces the acid-rock reaction rate and filtration loss under harsh working conditions such as high temperature, strong shear, high salinity, and a high concentration of acid. The synthesized acid-fracturing thickener (SYGT) has wide application potential in the development of carbonate reservoirs under high-temperature conditions. Published version This research was funded by the National Natural Science Foundation of China, grant number 51574089. 2024-03-12T00:55:15Z 2024-03-12T00:55:15Z 2023 Journal Article Sui, Y., Guo, T., Li, D., Guo, D., Zhang, Z. & Cao, G. (2023). Synthesis and performance evaluation of a novel high-temperature-resistant thickener. Molecules, 28(20), 28207036-. https://dx.doi.org/10.3390/molecules28207036 1420-3049 https://hdl.handle.net/10356/174012 10.3390/molecules28207036 37894515 2-s2.0-85175054667 20 28 28207036 en Molecules © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 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
Carbonate reservoir
Temperature stability
spellingShingle Engineering
Carbonate reservoir
Temperature stability
Sui, Yu
Guo, Tianyue
Li, Dan
Guo, Da
Zhang, Zhiqiu
Cao, Guangsheng
Synthesis and performance evaluation of a novel high-temperature-resistant thickener
description Successful exploitation of carbonate reservoirs relies on the acid-fracturing process, while the thickeners used in this process play a key role. It is a common engineering problem that thickeners usually fail to function when used in high-temperature environments. Until now, no research has ventured into the field of synthesizing thickeners which can be effectively used at ultra-high temperatures up to 180 °C. In our current study, a novel high-temperature-resistant polyacrylamide thickener named SYGT has been developed. The thermal gravimetric analysis (TGA) reveals that SYGT is capable of withstanding temperatures of up to 300 °C. Both our scanning electron microscopy (SEM) and rheological analysis demonstrate that the SYGT exhibits excellent resistance to both temperature and shear. At 180 °C, the viscosity of the SYGT aqueous solution is no lower than 61.7 mPa·s at a 20% H+ concentration or high salt concentration, and the fracture conductivity of the thickened acid reaches 6 D·cm. For the first time, the influence of the polymer spatial network's structural parameters on the viscosity of polymer solutions has been evaluated quantitatively. It was discovered that the length and surrounding area of the SNS skeleton have a synergistic effect on the viscosity of the polymer solution. Our experiments show that SYGT effectively reduces the acid-rock reaction rate and filtration loss under harsh working conditions such as high temperature, strong shear, high salinity, and a high concentration of acid. The synthesized acid-fracturing thickener (SYGT) has wide application potential in the development of carbonate reservoirs under high-temperature conditions.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Sui, Yu
Guo, Tianyue
Li, Dan
Guo, Da
Zhang, Zhiqiu
Cao, Guangsheng
format Article
author Sui, Yu
Guo, Tianyue
Li, Dan
Guo, Da
Zhang, Zhiqiu
Cao, Guangsheng
author_sort Sui, Yu
title Synthesis and performance evaluation of a novel high-temperature-resistant thickener
title_short Synthesis and performance evaluation of a novel high-temperature-resistant thickener
title_full Synthesis and performance evaluation of a novel high-temperature-resistant thickener
title_fullStr Synthesis and performance evaluation of a novel high-temperature-resistant thickener
title_full_unstemmed Synthesis and performance evaluation of a novel high-temperature-resistant thickener
title_sort synthesis and performance evaluation of a novel high-temperature-resistant thickener
publishDate 2024
url https://hdl.handle.net/10356/174012
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