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Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields

As compared to China’s overall oil reserves, the reserve share of offshore oilfields is rather significant. However, offshore oilfield circumstances for enhanced oil recovery (EOR) include not just severe temperatures and salinity, but also restricted space on offshore platforms. This harsh oil prod...

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Autores principales: Yi, Fei, Huang, Bo, Wang, Chengsheng, Tang, Xiaoxu, Wang, Xiujun, Liu, Quangang, Su, Yanhui, Chen, Shijia, Wu, Xiaoyan, Chen, Bin, Zhang, Jing, Wu, Dianguo, Yu, Shuai, Feng, Yujun, Su, Xin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104856/
https://www.ncbi.nlm.nih.gov/pubmed/35566095
http://dx.doi.org/10.3390/molecules27092744
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author Yi, Fei
Huang, Bo
Wang, Chengsheng
Tang, Xiaoxu
Wang, Xiujun
Liu, Quangang
Su, Yanhui
Chen, Shijia
Wu, Xiaoyan
Chen, Bin
Zhang, Jing
Wu, Dianguo
Yu, Shuai
Feng, Yujun
Su, Xin
author_facet Yi, Fei
Huang, Bo
Wang, Chengsheng
Tang, Xiaoxu
Wang, Xiujun
Liu, Quangang
Su, Yanhui
Chen, Shijia
Wu, Xiaoyan
Chen, Bin
Zhang, Jing
Wu, Dianguo
Yu, Shuai
Feng, Yujun
Su, Xin
author_sort Yi, Fei
collection PubMed
description As compared to China’s overall oil reserves, the reserve share of offshore oilfields is rather significant. However, offshore oilfield circumstances for enhanced oil recovery (EOR) include not just severe temperatures and salinity, but also restricted space on offshore platforms. This harsh oil production environment requires polymers with relatively strong salt resistance, solubility, thickening ability, rapid, superior injection capabilities, and anti-shearing ability. As a result, research into polymers with high viscosity and quick solubility is recognized as critical to meeting the criteria of polymer flooding in offshore oil reservoirs. For the above purposes, a novel hydrophobically associating polymer (HAP) was prepared to be used for polymer flooding of Bohai offshore oilfields. The synthetic procedure was free radical polymerization in aqueous solutions starting at 0 °C, using acrylamide (AM), acrylic acid (AA), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), and poly(ethylene glycol) octadecyl methacrylate (POM) as comonomers. It was discovered that under ideal conditions, the molecular weight of HAP exceeds 2.1 × 10(7) g⋅mol(−1). In a simulated reservoir environment, HAP has substantially greater solubility, thickening property, and salt resistance than conventional polyacrylamide (HPAM), with equivalent molecular weight. Finally, the injectivity and propagation of the two polymers in porous media were investigated. Compared with HPAM, which has a similar molecular weight, HAP solution with the concentration of 0.175% had a much better oil displacement effect in the porous medium, which can enhance oil recovery by 8.8%. These discoveries have the potential to pave the way for chemical EOR in offshore oilfields.
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spelling pubmed-91048562022-05-14 Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields Yi, Fei Huang, Bo Wang, Chengsheng Tang, Xiaoxu Wang, Xiujun Liu, Quangang Su, Yanhui Chen, Shijia Wu, Xiaoyan Chen, Bin Zhang, Jing Wu, Dianguo Yu, Shuai Feng, Yujun Su, Xin Molecules Article As compared to China’s overall oil reserves, the reserve share of offshore oilfields is rather significant. However, offshore oilfield circumstances for enhanced oil recovery (EOR) include not just severe temperatures and salinity, but also restricted space on offshore platforms. This harsh oil production environment requires polymers with relatively strong salt resistance, solubility, thickening ability, rapid, superior injection capabilities, and anti-shearing ability. As a result, research into polymers with high viscosity and quick solubility is recognized as critical to meeting the criteria of polymer flooding in offshore oil reservoirs. For the above purposes, a novel hydrophobically associating polymer (HAP) was prepared to be used for polymer flooding of Bohai offshore oilfields. The synthetic procedure was free radical polymerization in aqueous solutions starting at 0 °C, using acrylamide (AM), acrylic acid (AA), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), and poly(ethylene glycol) octadecyl methacrylate (POM) as comonomers. It was discovered that under ideal conditions, the molecular weight of HAP exceeds 2.1 × 10(7) g⋅mol(−1). In a simulated reservoir environment, HAP has substantially greater solubility, thickening property, and salt resistance than conventional polyacrylamide (HPAM), with equivalent molecular weight. Finally, the injectivity and propagation of the two polymers in porous media were investigated. Compared with HPAM, which has a similar molecular weight, HAP solution with the concentration of 0.175% had a much better oil displacement effect in the porous medium, which can enhance oil recovery by 8.8%. These discoveries have the potential to pave the way for chemical EOR in offshore oilfields. MDPI 2022-04-24 /pmc/articles/PMC9104856/ /pubmed/35566095 http://dx.doi.org/10.3390/molecules27092744 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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/).
spellingShingle Article
Yi, Fei
Huang, Bo
Wang, Chengsheng
Tang, Xiaoxu
Wang, Xiujun
Liu, Quangang
Su, Yanhui
Chen, Shijia
Wu, Xiaoyan
Chen, Bin
Zhang, Jing
Wu, Dianguo
Yu, Shuai
Feng, Yujun
Su, Xin
Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields
title Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields
title_full Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields
title_fullStr Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields
title_full_unstemmed Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields
title_short Hydrophobically Associating Polymers Dissolved in Seawater for Enhanced Oil Recovery of Bohai Offshore Oilfields
title_sort hydrophobically associating polymers dissolved in seawater for enhanced oil recovery of bohai offshore oilfields
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104856/
https://www.ncbi.nlm.nih.gov/pubmed/35566095
http://dx.doi.org/10.3390/molecules27092744
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