Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT Scanning
Tight sandstone reservoirs are ideal locations for CO<sub>2</sub> storage. To evaluate the oil displacement efficiency and storage potential of CO<sub>2</sub> in the tight sandstone reservoir in the Huang 3 area of the Changqing Oilfield, four kinds of displacement experiment...
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2022-08-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/17/6201 |
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| author | Ping Yue Feng Liu Kai Yang Chunshuo Han Chao Ren Jiangtang Zhou Xiukun Wang Quantang Fang Xinxin Li Liangbin Dou |
| author_facet | Ping Yue Feng Liu Kai Yang Chunshuo Han Chao Ren Jiangtang Zhou Xiukun Wang Quantang Fang Xinxin Li Liangbin Dou |
| author_sort | Ping Yue |
| collection | DOAJ |
| description | Tight sandstone reservoirs are ideal locations for CO<sub>2</sub> storage. To evaluate the oil displacement efficiency and storage potential of CO<sub>2</sub> in the tight sandstone reservoir in the Huang 3 area of the Changqing Oilfield, four kinds of displacement experiments were conducted on core samples from the Chang 8 Formation in the Huang 3 area. These experiments were performed using micro-displacement equipment, digital core technology, and an online CT scanning system; the different oil displacement processes were recorded as three-dimensional images. The results show that the CO<sub>2</sub> flooding alternated with water scheme can improve crude oil recovery the most. Comparing the cores before and after the displacement shows that the amount of crude oil in pores with larger sizes decreases more. The remaining oil is mainly in thin films or is dispersed and star-shaped, indicating that the crude oil in the medium and large pores is swept and recovered. The CO<sub>2</sub> displacement efficiency is 41.67~55.08%, and the CO<sub>2</sub> storage rate is 38.16~46.89%. The proportion of remaining oil in the throat of the small and medium-sized pores is still high, which is the key to oil recovery in the later stages. |
| first_indexed | 2024-03-10T01:52:35Z |
| format | Article |
| id | doaj.art-0bc676f2ca104bdf8162408f1449020e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T01:52:35Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-0bc676f2ca104bdf8162408f1449020e2023-11-23T13:02:03ZengMDPI AGEnergies1996-10732022-08-011517620110.3390/en15176201Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT ScanningPing Yue0Feng Liu1Kai Yang2Chunshuo Han3Chao Ren4Jiangtang Zhou5Xiukun Wang6Quantang Fang7Xinxin Li8Liangbin Dou9State Key Laboratory of Reservoir Geology and Development, Southwest Petroleum University, Chengdu 610500, ChinaSchool of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaSchool of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaSchool of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaChangqing Oilfield Company, Petro China, Xi’an 710018, ChinaChangqing Oilfield Company, Petro China, Xi’an 710018, ChinaInstitute of Unconventional Oil and Gas Science and Technology, China University of Petroleum (Beijing), Beijing 102249, ChinaState Key Laboratory of Reservoir Geology and Development, Southwest Petroleum University, Chengdu 610500, ChinaChangqing Engineering Design Co., Ltd., Petro China, Xi’an 710018, ChinaSchool of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, ChinaTight sandstone reservoirs are ideal locations for CO<sub>2</sub> storage. To evaluate the oil displacement efficiency and storage potential of CO<sub>2</sub> in the tight sandstone reservoir in the Huang 3 area of the Changqing Oilfield, four kinds of displacement experiments were conducted on core samples from the Chang 8 Formation in the Huang 3 area. These experiments were performed using micro-displacement equipment, digital core technology, and an online CT scanning system; the different oil displacement processes were recorded as three-dimensional images. The results show that the CO<sub>2</sub> flooding alternated with water scheme can improve crude oil recovery the most. Comparing the cores before and after the displacement shows that the amount of crude oil in pores with larger sizes decreases more. The remaining oil is mainly in thin films or is dispersed and star-shaped, indicating that the crude oil in the medium and large pores is swept and recovered. The CO<sub>2</sub> displacement efficiency is 41.67~55.08%, and the CO<sub>2</sub> storage rate is 38.16~46.89%. The proportion of remaining oil in the throat of the small and medium-sized pores is still high, which is the key to oil recovery in the later stages.https://www.mdpi.com/1996-1073/15/17/6201CO<sub>2</sub> floodingCO<sub>2</sub>-enhanced oil recoveryCO<sub>2</sub> storageextra-low permeability sand reservoirCT scanningremaining oil distribution |
| spellingShingle | Ping Yue Feng Liu Kai Yang Chunshuo Han Chao Ren Jiangtang Zhou Xiukun Wang Quantang Fang Xinxin Li Liangbin Dou Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT Scanning Energies CO<sub>2</sub> flooding CO<sub>2</sub>-enhanced oil recovery CO<sub>2</sub> storage extra-low permeability sand reservoir CT scanning remaining oil distribution |
| title | Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT Scanning |
| title_full | Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT Scanning |
| title_fullStr | Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT Scanning |
| title_full_unstemmed | Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT Scanning |
| title_short | Micro-Displacement and Storage Mechanism of CO<sub>2</sub> in Tight Sandstone Reservoirs Based on CT Scanning |
| title_sort | micro displacement and storage mechanism of co sub 2 sub in tight sandstone reservoirs based on ct scanning |
| topic | CO<sub>2</sub> flooding CO<sub>2</sub>-enhanced oil recovery CO<sub>2</sub> storage extra-low permeability sand reservoir CT scanning remaining oil distribution |
| url | https://www.mdpi.com/1996-1073/15/17/6201 |
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