A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric Surfactants
In order to evaluate the physical and chemical properties of polymer surfactants and analyze their oil displacement mechanisms, three types of poly-surfactant used in the Daqing oil field were chosen to be researched, and the oil displacement effects were studied using poly-surfactants of different...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/6/1321 |
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| author | Junhui Guo Fulin Wang Yunfei Zhao Peng Wang Tianzhi Wang Jixiang Yang Bo Yang Liangliang Ma |
| author_facet | Junhui Guo Fulin Wang Yunfei Zhao Peng Wang Tianzhi Wang Jixiang Yang Bo Yang Liangliang Ma |
| author_sort | Junhui Guo |
| collection | DOAJ |
| description | In order to evaluate the physical and chemical properties of polymer surfactants and analyze their oil displacement mechanisms, three types of poly-surfactant used in the Daqing oil field were chosen to be researched, and the oil displacement effects were studied using poly-surfactants of different viscosity, dehydrating rate, and core permeability. The main purpose is to determine the reasonable range of different characteristic indexes of polymeric surfactant flooding. The oil displacement effect of 15 cores was analyzed, and the effects of viscosity, the dehydrating rate of emulsion, and permeability on EOR (Enhanced Oil Recovery) were analyzed. The oil displacement mechanisms of polymeric surfactants were researched using a photolithographic glass core. This paper explores the mechanism underlying production enhancement as an EOR target, while simultaneously conducting laboratory tests to assess the physical and chemical properties of polymeric surfactants. The poly-surfactant agents exhibit a notable increase in viscosity, with the optimal displacement effect observed at a core effective permeability exceeding 400 mD, resulting in a potential EOR of 15% or higher. Moreover, at a viscosity ranging between 40 and 70 mPa·s, the total EOR can reach 73%, with the peak efficiency occurring at a viscosity of 60 mPa·s. The water loss rate of the emulsion, ranging between 30% and 70%, achieves optimal performance at 50%. The poly-surfactants’ higher viscosity extends the oil sweep area, enhancing recovery efficiency, and noticeably reducing residual oil compared to water flooding. During poly-surfactant flooding, a substantial amount of residual oil is extracted and transformed into droplets. The rapid emulsification of the polymeric surfactant solution with crude oil forms a stable emulsion, contributing to its significant oil recovery effect. This research provides valuable technical support for EOR in thin and low-quality reservoirs of onshore multi-layered sandstone reservoirs. |
| first_indexed | 2024-04-24T17:58:38Z |
| format | Article |
| id | doaj.art-c2f849288f0c4920b56188273bf75601 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-04-24T17:58:38Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-c2f849288f0c4920b56188273bf756012024-03-27T13:57:03ZengMDPI AGMolecules1420-30492024-03-01296132110.3390/molecules29061321A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric SurfactantsJunhui Guo0Fulin Wang1Yunfei Zhao2Peng Wang3Tianzhi Wang4Jixiang Yang5Bo Yang6Liangliang Ma7MOE Key Laboratory of Enhanced Oil Recovery, Northeast Petroleum University, Daqing 163712, ChinaE&D Research Institute of PetroChina Daqing Oilfield Co., Ltd., Daqing 163712, ChinaPetroChina Daqing Oilfield Co., Ltd., Daqing 163002, ChinaPetroChina Daqing Oilfield Co., Ltd., Daqing 163002, ChinaE&D Research Institute of PetroChina Daqing Oilfield Co., Ltd., Daqing 163712, ChinaE&D Research Institute of PetroChina Daqing Oilfield Co., Ltd., Daqing 163712, ChinaTest Technical Services Branch of Daqing Oilfield Company Ltd., Daqing 163712, ChinaPetroChina Daqing Oilfield Co., Ltd., Daqing 163002, ChinaIn order to evaluate the physical and chemical properties of polymer surfactants and analyze their oil displacement mechanisms, three types of poly-surfactant used in the Daqing oil field were chosen to be researched, and the oil displacement effects were studied using poly-surfactants of different viscosity, dehydrating rate, and core permeability. The main purpose is to determine the reasonable range of different characteristic indexes of polymeric surfactant flooding. The oil displacement effect of 15 cores was analyzed, and the effects of viscosity, the dehydrating rate of emulsion, and permeability on EOR (Enhanced Oil Recovery) were analyzed. The oil displacement mechanisms of polymeric surfactants were researched using a photolithographic glass core. This paper explores the mechanism underlying production enhancement as an EOR target, while simultaneously conducting laboratory tests to assess the physical and chemical properties of polymeric surfactants. The poly-surfactant agents exhibit a notable increase in viscosity, with the optimal displacement effect observed at a core effective permeability exceeding 400 mD, resulting in a potential EOR of 15% or higher. Moreover, at a viscosity ranging between 40 and 70 mPa·s, the total EOR can reach 73%, with the peak efficiency occurring at a viscosity of 60 mPa·s. The water loss rate of the emulsion, ranging between 30% and 70%, achieves optimal performance at 50%. The poly-surfactants’ higher viscosity extends the oil sweep area, enhancing recovery efficiency, and noticeably reducing residual oil compared to water flooding. During poly-surfactant flooding, a substantial amount of residual oil is extracted and transformed into droplets. The rapid emulsification of the polymeric surfactant solution with crude oil forms a stable emulsion, contributing to its significant oil recovery effect. This research provides valuable technical support for EOR in thin and low-quality reservoirs of onshore multi-layered sandstone reservoirs.https://www.mdpi.com/1420-3049/29/6/1321polymeric surfactantEOR mechanismonshore multi-layered sandstone reservoir |
| spellingShingle | Junhui Guo Fulin Wang Yunfei Zhao Peng Wang Tianzhi Wang Jixiang Yang Bo Yang Liangliang Ma A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric Surfactants Molecules polymeric surfactant EOR mechanism onshore multi-layered sandstone reservoir |
| title | A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric Surfactants |
| title_full | A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric Surfactants |
| title_fullStr | A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric Surfactants |
| title_full_unstemmed | A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric Surfactants |
| title_short | A Laboratory Experimental Study on Enhancing the Oil Recovery Mechanisms of Polymeric Surfactants |
| title_sort | laboratory experimental study on enhancing the oil recovery mechanisms of polymeric surfactants |
| topic | polymeric surfactant EOR mechanism onshore multi-layered sandstone reservoir |
| url | https://www.mdpi.com/1420-3049/29/6/1321 |
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