Study on the mechanism of CO2 injection to improve tight sandstone gas recovery
Supercritical CO2 can improve gas recovery and achieve carbon sequestration in tight gas reservoir. It is a hot topic but not applied extensively. The main restricts include the unclear mechanism of gas-to-gas displacement and the reduction of the natural gas asset value due to CO2 breakthrough. In...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722025987 |
| _version_ | 1827902795890556928 |
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| author | Haiying Liao Weiyi Pan Yingfu He Xin Fang Yao Zhang |
| author_facet | Haiying Liao Weiyi Pan Yingfu He Xin Fang Yao Zhang |
| author_sort | Haiying Liao |
| collection | DOAJ |
| description | Supercritical CO2 can improve gas recovery and achieve carbon sequestration in tight gas reservoir. It is a hot topic but not applied extensively. The main restricts include the unclear mechanism of gas-to-gas displacement and the reduction of the natural gas asset value due to CO2 breakthrough. In this paper, a novel experimental method is used, through constant-volume and constant-pressure experiments, to analyze the mixing process of CO2 and natural gas in different parts of vessel. Moreover, the mechanism and impact factors of natural gas displaced by supercritical CO2 are demonstrated in laboratory and numerical simulation. Based on the experiments, the diffusion coefficient of CO2 in natural gas (CH4) is measured and input into the numerical model. The results show that supercritical CO2 in the reservoir is ‘partially miscible’ with the natural gas. CO2 displaces CH4 to move upward due to the gravity differentiation, and CH4 is produced in the process of CO2-subsidence. CO2 flooding can enhance gas recovery by 18%, which verifies the technical feasibility of CO2 flooding in tight gas reservoirs. |
| first_indexed | 2024-03-13T00:04:15Z |
| format | Article |
| id | doaj.art-cdf57518f8584cdabd23a9b58a7c62d4 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-03-13T00:04:15Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-cdf57518f8584cdabd23a9b58a7c62d42023-07-13T05:28:41ZengElsevierEnergy Reports2352-48472023-12-019645656Study on the mechanism of CO2 injection to improve tight sandstone gas recoveryHaiying Liao0Weiyi Pan1Yingfu He2Xin Fang3Yao Zhang4Corresponding author.; SINOPEC Exploration & Production Research Institute, Beijing 100083, ChinaSINOPEC Exploration & Production Research Institute, Beijing 100083, ChinaSINOPEC Exploration & Production Research Institute, Beijing 100083, ChinaSINOPEC Exploration & Production Research Institute, Beijing 100083, ChinaSINOPEC Exploration & Production Research Institute, Beijing 100083, ChinaSupercritical CO2 can improve gas recovery and achieve carbon sequestration in tight gas reservoir. It is a hot topic but not applied extensively. The main restricts include the unclear mechanism of gas-to-gas displacement and the reduction of the natural gas asset value due to CO2 breakthrough. In this paper, a novel experimental method is used, through constant-volume and constant-pressure experiments, to analyze the mixing process of CO2 and natural gas in different parts of vessel. Moreover, the mechanism and impact factors of natural gas displaced by supercritical CO2 are demonstrated in laboratory and numerical simulation. Based on the experiments, the diffusion coefficient of CO2 in natural gas (CH4) is measured and input into the numerical model. The results show that supercritical CO2 in the reservoir is ‘partially miscible’ with the natural gas. CO2 displaces CH4 to move upward due to the gravity differentiation, and CH4 is produced in the process of CO2-subsidence. CO2 flooding can enhance gas recovery by 18%, which verifies the technical feasibility of CO2 flooding in tight gas reservoirs.http://www.sciencedirect.com/science/article/pii/S2352484722025987CO2 floodingGas reservoirEnhanced gas recoveryNumerical simulation |
| spellingShingle | Haiying Liao Weiyi Pan Yingfu He Xin Fang Yao Zhang Study on the mechanism of CO2 injection to improve tight sandstone gas recovery Energy Reports CO2 flooding Gas reservoir Enhanced gas recovery Numerical simulation |
| title | Study on the mechanism of CO2 injection to improve tight sandstone gas recovery |
| title_full | Study on the mechanism of CO2 injection to improve tight sandstone gas recovery |
| title_fullStr | Study on the mechanism of CO2 injection to improve tight sandstone gas recovery |
| title_full_unstemmed | Study on the mechanism of CO2 injection to improve tight sandstone gas recovery |
| title_short | Study on the mechanism of CO2 injection to improve tight sandstone gas recovery |
| title_sort | study on the mechanism of co2 injection to improve tight sandstone gas recovery |
| topic | CO2 flooding Gas reservoir Enhanced gas recovery Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722025987 |
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