Effect of Surface Type on the Flow Characteristics in Shale Nanopores
The underlying mechanism of shale gas migration behavior is of great importance to understanding the flow behavior and the prediction of shale gas flux. The slippage of the methane molecules on the surface is generally emphasized in nanopores in most predicted methods currently. In this work, we use...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/6641922 |
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| _version_ | 1850106301862903808 |
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| author | Shiyuan Zhan Yuliang Su Mingjing Lu Mingyu Cai Jingang Fu Zupeng Liu Kaiyu Wang Qi Han |
| author_facet | Shiyuan Zhan Yuliang Su Mingjing Lu Mingyu Cai Jingang Fu Zupeng Liu Kaiyu Wang Qi Han |
| author_sort | Shiyuan Zhan |
| collection | DOAJ |
| description | The underlying mechanism of shale gas migration behavior is of great importance to understanding the flow behavior and the prediction of shale gas flux. The slippage of the methane molecules on the surface is generally emphasized in nanopores in most predicted methods currently. In this work, we use molecular dynamic (MD) simulations to study the methane flow behavior in organic (graphene) and inorganic (quartz) nanopores with various pore size. It is observed that the slippage is obvious only on the graphene nanopores and disappeared on the quartz surface. Compared with the traditional Navier-Stokes equation combined with the no-slip boundary, the enhancement of the gas flux is nonnegligible in the graphene nanopores and could be neglected in the quartz nanopores. In addition, the flux contribution ratios of the adsorption layer, Knudsen layer, and the bulk gas are analyzed. In quartz nanopores, the contributions of the adsorption layer and the Knudsen layer are slight when the pore size is larger than 10 nm. It is also noted that even if the Knudsen number is the same, the flow mode may be various with the effect of the pore surface type. Our work should give molecular insights into gas migration mechanisms in organic and inorganic nanopores and provide important reference to the prediction of the gas flow in various types of shale nanopores. |
| format | Article |
| id | doaj-art-2e8b9b9b881a4587a94c45feddca06ff |
| institution | OA Journals |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-2e8b9b9b881a4587a94c45feddca06ff2025-08-20T02:38:51ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66419226641922Effect of Surface Type on the Flow Characteristics in Shale NanoporesShiyuan Zhan0Yuliang Su1Mingjing Lu2Mingyu Cai3Jingang Fu4Zupeng Liu5Kaiyu Wang6Qi Han7Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, Qingdao 266580, ChinaKey Laboratory of Unconventional Oil & Gas Development, Ministry of Education, Qingdao 266580, ChinaPetroleum Engineering Technology Research Institute of Shengli Oilfield, SINOPEC, Dongying 257067, ChinaKey Laboratory of Unconventional Oil & Gas Development, Ministry of Education, Qingdao 266580, ChinaKey Laboratory of Unconventional Oil & Gas Development, Ministry of Education, Qingdao 266580, ChinaShengli Oilfield Exploration and Development Research Institute, SINOPEC, Dongying 257015, ChinaResearch Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla 84100, ChinaExploration and Development Research Institute of North China Oilfield Company, PetroChina, Renqiu 062550, ChinaThe underlying mechanism of shale gas migration behavior is of great importance to understanding the flow behavior and the prediction of shale gas flux. The slippage of the methane molecules on the surface is generally emphasized in nanopores in most predicted methods currently. In this work, we use molecular dynamic (MD) simulations to study the methane flow behavior in organic (graphene) and inorganic (quartz) nanopores with various pore size. It is observed that the slippage is obvious only on the graphene nanopores and disappeared on the quartz surface. Compared with the traditional Navier-Stokes equation combined with the no-slip boundary, the enhancement of the gas flux is nonnegligible in the graphene nanopores and could be neglected in the quartz nanopores. In addition, the flux contribution ratios of the adsorption layer, Knudsen layer, and the bulk gas are analyzed. In quartz nanopores, the contributions of the adsorption layer and the Knudsen layer are slight when the pore size is larger than 10 nm. It is also noted that even if the Knudsen number is the same, the flow mode may be various with the effect of the pore surface type. Our work should give molecular insights into gas migration mechanisms in organic and inorganic nanopores and provide important reference to the prediction of the gas flow in various types of shale nanopores.http://dx.doi.org/10.1155/2021/6641922 |
| spellingShingle | Shiyuan Zhan Yuliang Su Mingjing Lu Mingyu Cai Jingang Fu Zupeng Liu Kaiyu Wang Qi Han Effect of Surface Type on the Flow Characteristics in Shale Nanopores Geofluids |
| title | Effect of Surface Type on the Flow Characteristics in Shale Nanopores |
| title_full | Effect of Surface Type on the Flow Characteristics in Shale Nanopores |
| title_fullStr | Effect of Surface Type on the Flow Characteristics in Shale Nanopores |
| title_full_unstemmed | Effect of Surface Type on the Flow Characteristics in Shale Nanopores |
| title_short | Effect of Surface Type on the Flow Characteristics in Shale Nanopores |
| title_sort | effect of surface type on the flow characteristics in shale nanopores |
| url | http://dx.doi.org/10.1155/2021/6641922 |
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