Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance
Given the difficulty in developing waterflooding in tight oil reservoirs, using waterflooding huff-n-puff is an effective method to improve oil recovery. Online nuclear magnetic resonance (NMR) can detect the change in internal oil and water during the core displacement process, and magnetic resonan...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-06-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/11/6/1524 |
| _version_ | 1811279775734431744 |
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| author | Ting Chen Zhengming Yang Yunhong Ding Yutian Luo Dan Qi Wei Lin Xinli Zhao |
| author_facet | Ting Chen Zhengming Yang Yunhong Ding Yutian Luo Dan Qi Wei Lin Xinli Zhao |
| author_sort | Ting Chen |
| collection | DOAJ |
| description | Given the difficulty in developing waterflooding in tight oil reservoirs, using waterflooding huff-n-puff is an effective method to improve oil recovery. Online nuclear magnetic resonance (NMR) can detect the change in internal oil and water during the core displacement process, and magnetic resonance imaging (MRI) in real time. To improve the tight oil reservoir development effectiveness, cores with different permeability were selected for a waterflooding huff-n-puff experiment. Combined with online NMR equipment, the fluid saturation, recovery rate, and residual oil distribution were studied. The experiments showed that, for tight oil cores, more than 80% of the pores were sub-micro- and micro-nanopores. More than 77.8% of crude oil existed in the sub-micro- and micropores, and movable fluids mainly existed in the micropores with a radius larger than 1 μm. The NMR data and the MRI images both demonstrated that the recovery ratio of waterflooding after waterflooding huff-n-puff was higher than that of conventional waterflooding, and, therefore, residual oil was lower. Choosing two cycles’ of waterflooding, huff-n-puff was more suitable for tight oil reservoir development. The production of crude oil increased by 22.2% in the field pilot test, which preliminarily proved that waterflooding huff-n-puff was suitable for tight oil reservoirs. |
| first_indexed | 2024-04-13T01:01:54Z |
| format | Article |
| id | doaj.art-3fca97a49b08466187b16197cf26a14c |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T01:01:54Z |
| publishDate | 2018-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3fca97a49b08466187b16197cf26a14c2022-12-22T03:09:27ZengMDPI AGEnergies1996-10732018-06-01116152410.3390/en11061524en11061524Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic ResonanceTing Chen0Zhengming Yang1Yunhong Ding2Yutian Luo3Dan Qi4Wei Lin5Xinli Zhao6School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaInstitute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, ChinaInstitute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, ChinaSchool of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaSchool of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaSchool of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaSchool of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaGiven the difficulty in developing waterflooding in tight oil reservoirs, using waterflooding huff-n-puff is an effective method to improve oil recovery. Online nuclear magnetic resonance (NMR) can detect the change in internal oil and water during the core displacement process, and magnetic resonance imaging (MRI) in real time. To improve the tight oil reservoir development effectiveness, cores with different permeability were selected for a waterflooding huff-n-puff experiment. Combined with online NMR equipment, the fluid saturation, recovery rate, and residual oil distribution were studied. The experiments showed that, for tight oil cores, more than 80% of the pores were sub-micro- and micro-nanopores. More than 77.8% of crude oil existed in the sub-micro- and micropores, and movable fluids mainly existed in the micropores with a radius larger than 1 μm. The NMR data and the MRI images both demonstrated that the recovery ratio of waterflooding after waterflooding huff-n-puff was higher than that of conventional waterflooding, and, therefore, residual oil was lower. Choosing two cycles’ of waterflooding, huff-n-puff was more suitable for tight oil reservoir development. The production of crude oil increased by 22.2% in the field pilot test, which preliminarily proved that waterflooding huff-n-puff was suitable for tight oil reservoirs.http://www.mdpi.com/1996-1073/11/6/1524online NMRtight oil coreswaterflooding huff-n-puffwaterfloodingoil recovery mechanism |
| spellingShingle | Ting Chen Zhengming Yang Yunhong Ding Yutian Luo Dan Qi Wei Lin Xinli Zhao Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance Energies online NMR tight oil cores waterflooding huff-n-puff waterflooding oil recovery mechanism |
| title | Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance |
| title_full | Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance |
| title_fullStr | Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance |
| title_full_unstemmed | Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance |
| title_short | Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance |
| title_sort | waterflooding huff n puff in tight oil cores using online nuclear magnetic resonance |
| topic | online NMR tight oil cores waterflooding huff-n-puff waterflooding oil recovery mechanism |
| url | http://www.mdpi.com/1996-1073/11/6/1524 |
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