Study on multi-scale oil displacement mechanism polymer/nanoparticle composite flooding
Polymer flooding is a popular enhanced oil recovery (EOR) technique; however, conventional polymers face challenges such as large dosages and limited shear resistance. To address these issues, we proposed a polymer/nanoparticle composite flooding method and investigated its feasibility through labor...
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Frontiers Media S.A.
2025-06-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2025.1605416/full |
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| author | Bei Wei Bei Wei Ningyu Zheng Ningyu Zheng Yu Xue Yu Xue Jian Hou Jian Hou Yongsheng Liu Yongsheng Liu Zhixin Guo Zhixin Guo Xuwen Qin Xuwen Qin Qingjun Du Qingjun Du |
| author_facet | Bei Wei Bei Wei Ningyu Zheng Ningyu Zheng Yu Xue Yu Xue Jian Hou Jian Hou Yongsheng Liu Yongsheng Liu Zhixin Guo Zhixin Guo Xuwen Qin Xuwen Qin Qingjun Du Qingjun Du |
| author_sort | Bei Wei |
| collection | DOAJ |
| description | Polymer flooding is a popular enhanced oil recovery (EOR) technique; however, conventional polymers face challenges such as large dosages and limited shear resistance. To address these issues, we proposed a polymer/nanoparticle composite flooding method and investigated its feasibility through laboratory experiments. We first characterized the rheological properties and interfacial tension of various polymer/nano-SiO2 composite systems and examined their microscopic morphology using scanning electron microscopy (SEM). Subsequently, we conducted two-dimensional microscopic flooding experiments to evaluate sweep efficiency and analyze residual oil distribution patterns. Finally, we performed core flooding experiments to compare injection pressure and recovery efficiency among different flooding systems. Results indicate that the presence of nano-SiO2 effectively enhanced the viscosity of the polymer system. The viscosity-increasing mechanism is nanoparticles adsorbing onto polymer molecular chains to form network structures. The polymer/nano-SiO2 composite system significantly increased sweep efficiency and promoted the transformation of residual oil from reticulated patterns to cluster, membrane, and punctiform patterns. Compared to polymer flooding, the polymer/nano-SiO2 composite system required a smaller amount of usage, effectively avoids environmental pollution, and showed better injectivity, achieving a 6% higher recovery while reducing injection pressure by up to 14%. |
| format | Article |
| id | doaj-art-99bbf3d923b64d778a10e86d674f48fd |
| institution | OA Journals |
| issn | 2296-2646 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj-art-99bbf3d923b64d778a10e86d674f48fd2025-08-20T02:01:57ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462025-06-011310.3389/fchem.2025.16054161605416Study on multi-scale oil displacement mechanism polymer/nanoparticle composite floodingBei Wei0Bei Wei1Ningyu Zheng2Ningyu Zheng3Yu Xue4Yu Xue5Jian Hou6Jian Hou7Yongsheng Liu8Yongsheng Liu9Zhixin Guo10Zhixin Guo11Xuwen Qin12Xuwen Qin13Qingjun Du14Qingjun Du15State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaState Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaState Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaState Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaState Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaState Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaState Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaState Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, ChinaPolymer flooding is a popular enhanced oil recovery (EOR) technique; however, conventional polymers face challenges such as large dosages and limited shear resistance. To address these issues, we proposed a polymer/nanoparticle composite flooding method and investigated its feasibility through laboratory experiments. We first characterized the rheological properties and interfacial tension of various polymer/nano-SiO2 composite systems and examined their microscopic morphology using scanning electron microscopy (SEM). Subsequently, we conducted two-dimensional microscopic flooding experiments to evaluate sweep efficiency and analyze residual oil distribution patterns. Finally, we performed core flooding experiments to compare injection pressure and recovery efficiency among different flooding systems. Results indicate that the presence of nano-SiO2 effectively enhanced the viscosity of the polymer system. The viscosity-increasing mechanism is nanoparticles adsorbing onto polymer molecular chains to form network structures. The polymer/nano-SiO2 composite system significantly increased sweep efficiency and promoted the transformation of residual oil from reticulated patterns to cluster, membrane, and punctiform patterns. Compared to polymer flooding, the polymer/nano-SiO2 composite system required a smaller amount of usage, effectively avoids environmental pollution, and showed better injectivity, achieving a 6% higher recovery while reducing injection pressure by up to 14%.https://www.frontiersin.org/articles/10.3389/fchem.2025.1605416/fullpolymer floodingnano-SiO2enhanced oil recoverymicroscopic flooding experimentscore displacement experiment |
| spellingShingle | Bei Wei Bei Wei Ningyu Zheng Ningyu Zheng Yu Xue Yu Xue Jian Hou Jian Hou Yongsheng Liu Yongsheng Liu Zhixin Guo Zhixin Guo Xuwen Qin Xuwen Qin Qingjun Du Qingjun Du Study on multi-scale oil displacement mechanism polymer/nanoparticle composite flooding Frontiers in Chemistry polymer flooding nano-SiO2 enhanced oil recovery microscopic flooding experiments core displacement experiment |
| title | Study on multi-scale oil displacement mechanism polymer/nanoparticle composite flooding |
| title_full | Study on multi-scale oil displacement mechanism polymer/nanoparticle composite flooding |
| title_fullStr | Study on multi-scale oil displacement mechanism polymer/nanoparticle composite flooding |
| title_full_unstemmed | Study on multi-scale oil displacement mechanism polymer/nanoparticle composite flooding |
| title_short | Study on multi-scale oil displacement mechanism polymer/nanoparticle composite flooding |
| title_sort | study on multi scale oil displacement mechanism polymer nanoparticle composite flooding |
| topic | polymer flooding nano-SiO2 enhanced oil recovery microscopic flooding experiments core displacement experiment |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2025.1605416/full |
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