Forced imbibition in tight sandstone cores
Spontaneous imbibition (SI) generally occurs under forced pressure (pressure difference between hydraulic fluid pressure and original pore pressure) during a shut-in period. However, the experimental study of SI is commonly performed at atmospheric pressure and the effect of forced pressure is often...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Petroleum Geology and Experiment
2021-01-01
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| Series: | Shiyou shiyan dizhi |
| Subjects: | |
| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202101144 |
| _version_ | 1797277200518479872 |
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| author | Yun JIANG Guoqing XU Yang SHI Yue YU Tianyi WANG Xinghang ZENG Wei ZHENG |
| author_facet | Yun JIANG Guoqing XU Yang SHI Yue YU Tianyi WANG Xinghang ZENG Wei ZHENG |
| author_sort | Yun JIANG |
| collection | DOAJ |
| description | Spontaneous imbibition (SI) generally occurs under forced pressure (pressure difference between hydraulic fluid pressure and original pore pressure) during a shut-in period. However, the experimental study of SI is commonly performed at atmospheric pressure and the effect of forced pressure is often neglected. In this study, the mechanism of SI in tight sandstone samples under forced pressure (forced imbibition, FI) was studied. A new experimental method for forced imbibition was firstly constructed based on low-field nuclear magnetic resonance(LF-NMR) measurements. After that, a correlation between SI and FI was discussed. Finally, a new dimensionless time model considering the effect of forced pressure for FI was constructed. The results showed that 96.76%-97.25% wt% of the oil was distributed in nano-pores (0.1 ms ≤ T2 ≤ 100 ms) of core samples, occupying the major pore space. The ultimate oil recovery for FI was significantly improved relative to that of SI, which was associated with the synergetic effect of enhanced SI and compaction. The new dimensionless time model for FI was proved to be effective and it provides a new method to calculate shut-in time at field scale. |
| first_indexed | 2024-03-07T15:45:12Z |
| format | Article |
| id | doaj.art-1d6073c7f2cb4a57bf80178401348093 |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T15:45:12Z |
| publishDate | 2021-01-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-1d6073c7f2cb4a57bf801784013480932024-03-05T04:40:39ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122021-01-0143114415310.11781/sysydz202101144sysydz-43-1-144Forced imbibition in tight sandstone coresYun JIANG0Guoqing XU1Yang SHI2Yue YU3Tianyi WANG4Xinghang ZENG5Wei ZHENG6PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaSINOPEC Research Institute of Petroleum Engineering, Beijing 100101, ChinaPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaPetroChina Southwest Oil & Gas Field Company, Chengdu, Sichuan 610056, ChinaPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaSINOPEC Research Institute of Petroleum Engineering, Beijing 100101, ChinaPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaSpontaneous imbibition (SI) generally occurs under forced pressure (pressure difference between hydraulic fluid pressure and original pore pressure) during a shut-in period. However, the experimental study of SI is commonly performed at atmospheric pressure and the effect of forced pressure is often neglected. In this study, the mechanism of SI in tight sandstone samples under forced pressure (forced imbibition, FI) was studied. A new experimental method for forced imbibition was firstly constructed based on low-field nuclear magnetic resonance(LF-NMR) measurements. After that, a correlation between SI and FI was discussed. Finally, a new dimensionless time model considering the effect of forced pressure for FI was constructed. The results showed that 96.76%-97.25% wt% of the oil was distributed in nano-pores (0.1 ms ≤ T2 ≤ 100 ms) of core samples, occupying the major pore space. The ultimate oil recovery for FI was significantly improved relative to that of SI, which was associated with the synergetic effect of enhanced SI and compaction. The new dimensionless time model for FI was proved to be effective and it provides a new method to calculate shut-in time at field scale.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202101144tight sandstoneforced imbibitionlf-nmrdimensionless time modelshut-in time |
| spellingShingle | Yun JIANG Guoqing XU Yang SHI Yue YU Tianyi WANG Xinghang ZENG Wei ZHENG Forced imbibition in tight sandstone cores Shiyou shiyan dizhi tight sandstone forced imbibition lf-nmr dimensionless time model shut-in time |
| title | Forced imbibition in tight sandstone cores |
| title_full | Forced imbibition in tight sandstone cores |
| title_fullStr | Forced imbibition in tight sandstone cores |
| title_full_unstemmed | Forced imbibition in tight sandstone cores |
| title_short | Forced imbibition in tight sandstone cores |
| title_sort | forced imbibition in tight sandstone cores |
| topic | tight sandstone forced imbibition lf-nmr dimensionless time model shut-in time |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202101144 |
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