Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage
Mechanical compaction is an important diagenetic process in sandstone reservoirs. Particle breakage, which commonly occurs during mechanical compaction, plays a significant role in controlling the physical properties of the reservoir. However, existing numerical simulation methods have limitations i...
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1038038/full |
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| author | Tong Jia Liqiang Zhang Liqiang Zhang Cai Chen Zuotao Wang Yiming Yan Yiming Yan Junjian Li |
| author_facet | Tong Jia Liqiang Zhang Liqiang Zhang Cai Chen Zuotao Wang Yiming Yan Yiming Yan Junjian Li |
| author_sort | Tong Jia |
| collection | DOAJ |
| description | Mechanical compaction is an important diagenetic process in sandstone reservoirs. Particle breakage, which commonly occurs during mechanical compaction, plays a significant role in controlling the physical properties of the reservoir. However, existing numerical simulation methods have limitations in simulating mechanical compaction when considering particle breakage. In this study, a discrete element simulation method of mechanical compaction was proposed based on particle cutting, and the experimental results reported in the literature were used to calibrate the simulation parameters. Finally, this method was applied to the simulation of the mechanical compaction of sandstone to analyze the pore evolution process. The results show that the new simulation method has high computational efficiency and can reflect the process of particle breakage. The simulation results coincide well with the experimental results. In the simulated mechanical compacted process of coarse sandstone, particle breakage is strong in the high-stress stage with a vertical stress of 30 MPa–50 MPa. The porosity and mean radii of pores and throats decreased rapidly, and the number of pores and throats increased rapidly in the high-stress stage. When the vertical stress reached 50 MPa, compared to the simulation results without considering particle breakage, the porosity difference rate caused by particle breakage was 4.63%; the radius difference rates of pores and throats were 2.78% and 6.8%, and the number difference rates of pores and throats were 4.95% and 8.74%, respectively. In the process of mechanical compaction, the pore evolution of the reservoir is controlled by the filling of the pre-existing pore space by the fragments generated through particle breakage and the generation of microfractures. Additionally, the simulation method presented in this study can be applied to complex geological conditions and can be combined with other reservoir simulation methods. The simulation results can provide rich training samples for artificial intelligence and other emerging technologies. |
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| language | English |
| last_indexed | 2024-04-10T22:41:53Z |
| publishDate | 2023-01-01 |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-8f523b7b6e7c42178de554a146fb71d72023-01-16T04:23:14ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10380381038038Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakageTong Jia0Liqiang Zhang1Liqiang Zhang2Cai Chen3Zuotao Wang4Yiming Yan5Yiming Yan6Junjian Li7School of Geosciences, China University of Petroleum, Qingdao, ChinaSchool of Geosciences, China University of Petroleum, Qingdao, ChinaKey Laboratory of Deep Oil and Gas, China University of Petroleum, Qingdao, ChinaResearch Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, ChinaResearch Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, ChinaSchool of Geosciences, China University of Petroleum, Qingdao, ChinaKey Laboratory of Deep Oil and Gas, China University of Petroleum, Qingdao, ChinaSchool of Geosciences, China University of Petroleum, Qingdao, ChinaMechanical compaction is an important diagenetic process in sandstone reservoirs. Particle breakage, which commonly occurs during mechanical compaction, plays a significant role in controlling the physical properties of the reservoir. However, existing numerical simulation methods have limitations in simulating mechanical compaction when considering particle breakage. In this study, a discrete element simulation method of mechanical compaction was proposed based on particle cutting, and the experimental results reported in the literature were used to calibrate the simulation parameters. Finally, this method was applied to the simulation of the mechanical compaction of sandstone to analyze the pore evolution process. The results show that the new simulation method has high computational efficiency and can reflect the process of particle breakage. The simulation results coincide well with the experimental results. In the simulated mechanical compacted process of coarse sandstone, particle breakage is strong in the high-stress stage with a vertical stress of 30 MPa–50 MPa. The porosity and mean radii of pores and throats decreased rapidly, and the number of pores and throats increased rapidly in the high-stress stage. When the vertical stress reached 50 MPa, compared to the simulation results without considering particle breakage, the porosity difference rate caused by particle breakage was 4.63%; the radius difference rates of pores and throats were 2.78% and 6.8%, and the number difference rates of pores and throats were 4.95% and 8.74%, respectively. In the process of mechanical compaction, the pore evolution of the reservoir is controlled by the filling of the pre-existing pore space by the fragments generated through particle breakage and the generation of microfractures. Additionally, the simulation method presented in this study can be applied to complex geological conditions and can be combined with other reservoir simulation methods. The simulation results can provide rich training samples for artificial intelligence and other emerging technologies.https://www.frontiersin.org/articles/10.3389/feart.2022.1038038/fullsandstone reservoirmechanical compactionparticle breakagepore evolutiondiscrete element method |
| spellingShingle | Tong Jia Liqiang Zhang Liqiang Zhang Cai Chen Zuotao Wang Yiming Yan Yiming Yan Junjian Li Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage Frontiers in Earth Science sandstone reservoir mechanical compaction particle breakage pore evolution discrete element method |
| title | Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage |
| title_full | Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage |
| title_fullStr | Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage |
| title_full_unstemmed | Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage |
| title_short | Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage |
| title_sort | numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage |
| topic | sandstone reservoir mechanical compaction particle breakage pore evolution discrete element method |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1038038/full |
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