Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirs
Carbon dioxide (CO 2 ) flooding is an effective method to enhance oil recovery in low-permeability reservoirs. Studying key geological factors controlling oil displacement efficiency is of great significance to the CO 2 injection scheme design in low-permeability reservoirs. Focusing on low-permeabl...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2021-05-01
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| Series: | Energy Exploration & Exploitation |
| Online Access: | https://doi.org/10.1177/0144598721995609 |
| _version_ | 1797278766377992192 |
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| author | Zhaosheng Wang Lianbo Zeng Jiangtao Yu Zhenguo Zhang Siyu Yang Yuncheng Liu |
| author_facet | Zhaosheng Wang Lianbo Zeng Jiangtao Yu Zhenguo Zhang Siyu Yang Yuncheng Liu |
| author_sort | Zhaosheng Wang |
| collection | DOAJ |
| description | Carbon dioxide (CO 2 ) flooding is an effective method to enhance oil recovery in low-permeability reservoirs. Studying key geological factors controlling oil displacement efficiency is of great significance to the CO 2 injection scheme design in low-permeability reservoirs. Focusing on low-permeable H reservoir in Songliao Basin, China, this paper describes the contact and connection of sand bodies, natural fractures and high-permeability zones with core samples, log data and experiment firstly. After that, the impact of interaction of sand body connection, natural fracture and high-permeability zone on oil displacement efficiency is determined by using geological and dynamic data in CO 2 injection area. Results indicate that the connection of single sand bodies between injectors and producters wells primarily controls CO 2 flooding in low-permeability reservoirs. Furthermore, coupling of sand body connection, natural fractures and high-permeability zones is the key geological factor governing oil displacement efficiency of CO 2 injection in low-permeability reservoirs, where well or generally-connected sand bodies can improve the efficiency significantly. Meanwhile, the dominant seepage channels in other directions have no influence on producers, which is beneficial to improve CO 2 flooding efficiency. |
| first_indexed | 2024-03-07T16:13:57Z |
| format | Article |
| id | doaj.art-6dd43ef097ba4f059d6ff21d7f1692dc |
| institution | Directory Open Access Journal |
| issn | 0144-5987 2048-4054 |
| language | English |
| last_indexed | 2024-03-07T16:13:57Z |
| publishDate | 2021-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Energy Exploration & Exploitation |
| spelling | doaj.art-6dd43ef097ba4f059d6ff21d7f1692dc2024-03-04T16:03:53ZengSAGE PublishingEnergy Exploration & Exploitation0144-59872048-40542021-05-013910.1177/0144598721995609Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirsZhaosheng WangLianbo ZengJiangtao YuZhenguo ZhangSiyu YangYuncheng LiuCarbon dioxide (CO 2 ) flooding is an effective method to enhance oil recovery in low-permeability reservoirs. Studying key geological factors controlling oil displacement efficiency is of great significance to the CO 2 injection scheme design in low-permeability reservoirs. Focusing on low-permeable H reservoir in Songliao Basin, China, this paper describes the contact and connection of sand bodies, natural fractures and high-permeability zones with core samples, log data and experiment firstly. After that, the impact of interaction of sand body connection, natural fracture and high-permeability zone on oil displacement efficiency is determined by using geological and dynamic data in CO 2 injection area. Results indicate that the connection of single sand bodies between injectors and producters wells primarily controls CO 2 flooding in low-permeability reservoirs. Furthermore, coupling of sand body connection, natural fractures and high-permeability zones is the key geological factor governing oil displacement efficiency of CO 2 injection in low-permeability reservoirs, where well or generally-connected sand bodies can improve the efficiency significantly. Meanwhile, the dominant seepage channels in other directions have no influence on producers, which is beneficial to improve CO 2 flooding efficiency.https://doi.org/10.1177/0144598721995609 |
| spellingShingle | Zhaosheng Wang Lianbo Zeng Jiangtao Yu Zhenguo Zhang Siyu Yang Yuncheng Liu Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirs Energy Exploration & Exploitation |
| title | Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirs |
| title_full | Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirs |
| title_fullStr | Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirs |
| title_full_unstemmed | Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirs |
| title_short | Key geological factors controlling oil displacement efficiency of CO injection in low-permeability reservoirs |
| title_sort | key geological factors controlling oil displacement efficiency of co injection in low permeability reservoirs |
| url | https://doi.org/10.1177/0144598721995609 |
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