Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone
Abstract Water flooding is an important way to improve recovery in low‐permeability sandstone oil reservoirs. How to decouple the water flooding process using dynamic and static information is a hot topic. In this paper, taking the Paleocene low‐permeability oil sandstone, BY area, eastern Nanxiang...
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Wiley
2024-11-01
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| Series: | Energy Science & Engineering |
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| Online Access: | https://doi.org/10.1002/ese3.1942 |
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| author | Houjiang Fan Xiaoqiang Liu Gang Li Xiang Li Ahmed E. Radwan Shuai Yin |
| author_facet | Houjiang Fan Xiaoqiang Liu Gang Li Xiang Li Ahmed E. Radwan Shuai Yin |
| author_sort | Houjiang Fan |
| collection | DOAJ |
| description | Abstract Water flooding is an important way to improve recovery in low‐permeability sandstone oil reservoirs. How to decouple the water flooding process using dynamic and static information is a hot topic. In this paper, taking the Paleocene low‐permeability oil sandstone, BY area, eastern Nanxiang Basin as an example, the microscopic water flooding process in the low‐permeability sandstone matrix was systematically investigated, and the characteristics of water channeling under the conditions of fracture existence were analyzed using the dynamic and static monitoring data. The results show that the target layer mainly develops frequently thin stacked composite sand bodies. Under the combined influence of matrix and fracture seepage, the low‐permeability sandstone developed by water flooding shows that there is a single direction of efficiency. The direction of advantageous water advancement is 45° north–east, and the speed of water flooding advancement is 2.57 m/day. Microscopic water‐drive oil experiments show that bound water is mainly distributed in the original low‐permeability sandstone as a membrane in the pore wall and as short rods in the throat. Differences in pore structure and petrophysical properties affect the residual oil content and degree of oil recovery. For sandstones with good petrophysical properties, mild water flooding can improve crude oil recovery. The increase in oil production is mainly concentrated in the early stage of water flooding development, and the increase in oil recovery degree is not significant with the increase in injection multiples in the middle and late stages. However, for sandstones with relatively poor petrophysical properties, water flooding is more effective in the early and late stages than in the middle stages. Therefore, it is necessary to adjust the water flooding measures according to the differences in the petrophysical properties of the sand body. Local tectonics and natural fracture strikes are important factors affecting the direction of the expansion of water flooding fractures. Overall, the prevention of water channeling in low‐permeability sandstones has to take into account the complex coupling between water flooding fractures, natural fractures, and hydraulic fractures. |
| format | Article |
| id | doaj-art-fa177afbcc584d769b6d5c4626894ecc |
| institution | Kabale University |
| issn | 2050-0505 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj-art-fa177afbcc584d769b6d5c4626894ecc2025-01-06T14:45:33ZengWileyEnergy Science & Engineering2050-05052024-11-0112115245526510.1002/ese3.1942Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstoneHoujiang Fan0Xiaoqiang Liu1Gang Li2Xiang Li3Ahmed E. Radwan4Shuai Yin5Division of Quality Management and Inspection Yibin University Yibin ChinaPetrochina Changqing Oilfield Company Oil Production Plant No. 11 Qingyang ChinaPetrochina Changqing Oilfield Company Oil Production Plant No. 5 Yulin ChinaPetrochina Changqing Oilfield Company Oil Production Plant No. 5 Yulin ChinaInstitute of Geological Sciences, Faculty of Geography and Geology Jagiellonian University Krakow PolandSchool of Earth Science and Engineering Xi'an Shiyou University Xi'an ChinaAbstract Water flooding is an important way to improve recovery in low‐permeability sandstone oil reservoirs. How to decouple the water flooding process using dynamic and static information is a hot topic. In this paper, taking the Paleocene low‐permeability oil sandstone, BY area, eastern Nanxiang Basin as an example, the microscopic water flooding process in the low‐permeability sandstone matrix was systematically investigated, and the characteristics of water channeling under the conditions of fracture existence were analyzed using the dynamic and static monitoring data. The results show that the target layer mainly develops frequently thin stacked composite sand bodies. Under the combined influence of matrix and fracture seepage, the low‐permeability sandstone developed by water flooding shows that there is a single direction of efficiency. The direction of advantageous water advancement is 45° north–east, and the speed of water flooding advancement is 2.57 m/day. Microscopic water‐drive oil experiments show that bound water is mainly distributed in the original low‐permeability sandstone as a membrane in the pore wall and as short rods in the throat. Differences in pore structure and petrophysical properties affect the residual oil content and degree of oil recovery. For sandstones with good petrophysical properties, mild water flooding can improve crude oil recovery. The increase in oil production is mainly concentrated in the early stage of water flooding development, and the increase in oil recovery degree is not significant with the increase in injection multiples in the middle and late stages. However, for sandstones with relatively poor petrophysical properties, water flooding is more effective in the early and late stages than in the middle stages. Therefore, it is necessary to adjust the water flooding measures according to the differences in the petrophysical properties of the sand body. Local tectonics and natural fracture strikes are important factors affecting the direction of the expansion of water flooding fractures. Overall, the prevention of water channeling in low‐permeability sandstones has to take into account the complex coupling between water flooding fractures, natural fractures, and hydraulic fractures.https://doi.org/10.1002/ese3.1942dynamic and static methodshydraulic fracturelow‐permeability sandstonenatural fracturewater floodingwater flooding fracture |
| spellingShingle | Houjiang Fan Xiaoqiang Liu Gang Li Xiang Li Ahmed E. Radwan Shuai Yin Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone Energy Science & Engineering dynamic and static methods hydraulic fracture low‐permeability sandstone natural fracture water flooding water flooding fracture |
| title | Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone |
| title_full | Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone |
| title_fullStr | Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone |
| title_full_unstemmed | Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone |
| title_short | Study on characteristics, efficiency, and variations of water flooding in different stages for low permeability oil sandstone |
| title_sort | study on characteristics efficiency and variations of water flooding in different stages for low permeability oil sandstone |
| topic | dynamic and static methods hydraulic fracture low‐permeability sandstone natural fracture water flooding water flooding fracture |
| url | https://doi.org/10.1002/ese3.1942 |
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