Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer Flooding
Following the application of polymer flooding in Daqing Oilfield, the heterogeneity between different layers has intensified, resulting in the formation of more favorable seepage channels and cross-flow of displacement fluids. Consequently, the circulation efficiency has decreased, necessitating the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/9/5/427 |
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| author | Yanfu Pi Zailai Su Ruibo Cao Bo Li Jinxin Liu Xinyu Fan Mingjia Zhao |
| author_facet | Yanfu Pi Zailai Su Ruibo Cao Bo Li Jinxin Liu Xinyu Fan Mingjia Zhao |
| author_sort | Yanfu Pi |
| collection | DOAJ |
| description | Following the application of polymer flooding in Daqing Oilfield, the heterogeneity between different layers has intensified, resulting in the formation of more favorable seepage channels and cross-flow of displacement fluids. Consequently, the circulation efficiency has decreased, necessitating the exploration of methods to enhance oil recovery. This paper focuses on experimental research utilizing a newly developed precrosslinked particle gel (PPG) combined with alkali surfactant polymer (ASP) to create a heterogeneous composite system. This study aims to improve the efficiency of heterogeneous system flooding after polymer flooding. The addition of PPG particles enhances the viscoelasticity of the ASP system, reduces the interfacial tension between the heterogeneous system and crude oil, and provides excellent stability. The heterogeneous system has high resistance and residual resistance coefficients during the migration process in a long core model, achieving an improvement rate of up to 90.1% under the permeability ratio of 9 between high and low permeability layers. Employing heterogeneous system flooding after polymer flooding can increase oil recovery by 14.6%. Furthermore, the oil recovery rate of low permeability layers can reach 28.6%. The experimental results confirm that the application of PPG/ASP heterogeneous flooding after polymer flooding can effectively plug high-flow seepage channels and improve oil washing efficiency. These findings hold significant implications for further reservoir development after polymer flooding. |
| first_indexed | 2024-03-11T03:42:29Z |
| format | Article |
| id | doaj.art-43a73ee217244343bf4235fb6c79e6e8 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-11T03:42:29Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-43a73ee217244343bf4235fb6c79e6e82023-11-18T01:28:22ZengMDPI AGGels2310-28612023-05-019542710.3390/gels9050427Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer FloodingYanfu Pi0Zailai Su1Ruibo Cao2Bo Li3Jinxin Liu4Xinyu Fan5Mingjia Zhao6Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163319, ChinaKey Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163319, ChinaEnhanced Oil Recovery Laboratory, Exploration and Development Research Institute, Daqing Oilfield Company Limited, Daqing 163712, ChinaEnhanced Oil Recovery Laboratory, Exploration and Development Research Institute, Daqing Oilfield Company Limited, Daqing 163712, ChinaKey Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163319, ChinaKey Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163319, ChinaKey Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163319, ChinaFollowing the application of polymer flooding in Daqing Oilfield, the heterogeneity between different layers has intensified, resulting in the formation of more favorable seepage channels and cross-flow of displacement fluids. Consequently, the circulation efficiency has decreased, necessitating the exploration of methods to enhance oil recovery. This paper focuses on experimental research utilizing a newly developed precrosslinked particle gel (PPG) combined with alkali surfactant polymer (ASP) to create a heterogeneous composite system. This study aims to improve the efficiency of heterogeneous system flooding after polymer flooding. The addition of PPG particles enhances the viscoelasticity of the ASP system, reduces the interfacial tension between the heterogeneous system and crude oil, and provides excellent stability. The heterogeneous system has high resistance and residual resistance coefficients during the migration process in a long core model, achieving an improvement rate of up to 90.1% under the permeability ratio of 9 between high and low permeability layers. Employing heterogeneous system flooding after polymer flooding can increase oil recovery by 14.6%. Furthermore, the oil recovery rate of low permeability layers can reach 28.6%. The experimental results confirm that the application of PPG/ASP heterogeneous flooding after polymer flooding can effectively plug high-flow seepage channels and improve oil washing efficiency. These findings hold significant implications for further reservoir development after polymer flooding.https://www.mdpi.com/2310-2861/9/5/427precrosslinked particle gelpost polymer floodingheterogeneous systemprofile control and floodingenhanced oil recovery |
| spellingShingle | Yanfu Pi Zailai Su Ruibo Cao Bo Li Jinxin Liu Xinyu Fan Mingjia Zhao Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer Flooding Gels precrosslinked particle gel post polymer flooding heterogeneous system profile control and flooding enhanced oil recovery |
| title | Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer Flooding |
| title_full | Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer Flooding |
| title_fullStr | Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer Flooding |
| title_full_unstemmed | Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer Flooding |
| title_short | Experimental Study on Enhanced Oil Recovery of PPG/ASP Heterogeneous System after Polymer Flooding |
| title_sort | experimental study on enhanced oil recovery of ppg asp heterogeneous system after polymer flooding |
| topic | precrosslinked particle gel post polymer flooding heterogeneous system profile control and flooding enhanced oil recovery |
| url | https://www.mdpi.com/2310-2861/9/5/427 |
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