Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation
Abstract The development of shale oil reservoirs is significant for the petroleum industry. Fluids in shale oil play exist in nanoscale pores, and the interaction between fluids and shale rock surface walls can lead to the expansion and deformation of the entire pore medium thus affecting the develo...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-09-01
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| Series: | Journal of Petroleum Exploration and Production Technology |
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| Online Access: | https://doi.org/10.1007/s13202-024-01865-w |
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| author | Xiangji Dou Jiajun Dai Mingguo Peng Yanfeng He Pengfei Zhu Jiahao Lu Zhengdong Lei Nan Pan Xinli Zhao |
| author_facet | Xiangji Dou Jiajun Dai Mingguo Peng Yanfeng He Pengfei Zhu Jiahao Lu Zhengdong Lei Nan Pan Xinli Zhao |
| author_sort | Xiangji Dou |
| collection | DOAJ |
| description | Abstract The development of shale oil reservoirs is significant for the petroleum industry. Fluids in shale oil play exist in nanoscale pores, and the interaction between fluids and shale rock surface walls can lead to the expansion and deformation of the entire pore medium thus affecting the development and production of oil reservoirs. We used an organic matter (graphene) pore model to represent the nanopore structure of shale reservoir. Methane, n-hexane and n-dodecane multi-component fluids were used to characterize shale oil. The adsorption and deformation law of multi-component shale oil in the nanopore was systematically studied by using the molecular simulation method. The results showed that the adsorption of multi-component shale oil in organic nanopores was positively correlated with pressure. The total adsorption amount increased with the increase of pressure. Firstly, when the ratio of CO2 was higher, it was more favorable for the development of crude oil and the large amount of CO2 sequestration. The adsorption amount was negatively correlated with temperature. Secondly, the adsorption amount of multicomponent shale oil is proportional to the pore size; The adsorption amount of large-size pore model is more sensitive to pressure changes than that of small-size pore model. Finally, the trend of adsorption deformation volume is similar to that of adsorption volume, which decreases with the increase of temperature. The shale deformation caused by CO2 injection at this time is much smaller than the other component ratios, indicating that the magnitude of deformation is positively related to the adsorption volume. |
| format | Article |
| id | doaj-art-5ffa36b7a1844f0999e50a7e4be285b1 |
| institution | Kabale University |
| issn | 2190-0558 2190-0566 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Petroleum Exploration and Production Technology |
| spelling | doaj-art-5ffa36b7a1844f0999e50a7e4be285b12024-11-17T12:10:58ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662024-09-0114113091310910.1007/s13202-024-01865-wStudy on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulationXiangji Dou0Jiajun Dai1Mingguo Peng2Yanfeng He3Pengfei Zhu4Jiahao Lu5Zhengdong Lei6Nan Pan7Xinli Zhao8School of Petroleum and Natural Gas Engineering, Changzhou UniversitySchool of Petroleum and Natural Gas Engineering, Changzhou UniversitySchool of Petroleum and Natural Gas Engineering, Changzhou UniversitySchool of Petroleum and Natural Gas Engineering, Changzhou UniversitySchool of Petroleum and Natural Gas Engineering, Changzhou UniversitySchool of Petroleum and Natural Gas Engineering, Changzhou UniversityResearch Institute of Petroleum Exploration & Development, PetroChina Company LimitedSchool of Petroleum and Natural Gas Engineering, Changzhou UniversitySchool of Petroleum and Natural Gas Engineering, Changzhou UniversityAbstract The development of shale oil reservoirs is significant for the petroleum industry. Fluids in shale oil play exist in nanoscale pores, and the interaction between fluids and shale rock surface walls can lead to the expansion and deformation of the entire pore medium thus affecting the development and production of oil reservoirs. We used an organic matter (graphene) pore model to represent the nanopore structure of shale reservoir. Methane, n-hexane and n-dodecane multi-component fluids were used to characterize shale oil. The adsorption and deformation law of multi-component shale oil in the nanopore was systematically studied by using the molecular simulation method. The results showed that the adsorption of multi-component shale oil in organic nanopores was positively correlated with pressure. The total adsorption amount increased with the increase of pressure. Firstly, when the ratio of CO2 was higher, it was more favorable for the development of crude oil and the large amount of CO2 sequestration. The adsorption amount was negatively correlated with temperature. Secondly, the adsorption amount of multicomponent shale oil is proportional to the pore size; The adsorption amount of large-size pore model is more sensitive to pressure changes than that of small-size pore model. Finally, the trend of adsorption deformation volume is similar to that of adsorption volume, which decreases with the increase of temperature. The shale deformation caused by CO2 injection at this time is much smaller than the other component ratios, indicating that the magnitude of deformation is positively related to the adsorption volume.https://doi.org/10.1007/s13202-024-01865-wShale oilAdsorptionDeformation lawCO2 sequestrationMolecular dynamics |
| spellingShingle | Xiangji Dou Jiajun Dai Mingguo Peng Yanfeng He Pengfei Zhu Jiahao Lu Zhengdong Lei Nan Pan Xinli Zhao Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation Journal of Petroleum Exploration and Production Technology Shale oil Adsorption Deformation law CO2 sequestration Molecular dynamics |
| title | Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation |
| title_full | Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation |
| title_fullStr | Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation |
| title_full_unstemmed | Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation |
| title_short | Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation |
| title_sort | study on the adsorption and deformation laws of multi components in shale oil with nanopores insights from the molecular simulation |
| topic | Shale oil Adsorption Deformation law CO2 sequestration Molecular dynamics |
| url | https://doi.org/10.1007/s13202-024-01865-w |
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