Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation Study
Abstract The intricate flow processes in nano‐pores pose limitations on the extraction of resources such as shale gas and gas hydrates. To observe water/gas two‐phase flow in nano‐pores, we employed molecular dynamics simulations on water/methane two‐phase flow in a hydrophilic SiO2 nanoslit, and ob...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL113458 |
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| author | Chao Zheng Guang‐Jun Guo Cheng Lu Yanhui Dong Bo Peng Wei Tang Bingyao Han |
| author_facet | Chao Zheng Guang‐Jun Guo Cheng Lu Yanhui Dong Bo Peng Wei Tang Bingyao Han |
| author_sort | Chao Zheng |
| collection | DOAJ |
| description | Abstract The intricate flow processes in nano‐pores pose limitations on the extraction of resources such as shale gas and gas hydrates. To observe water/gas two‐phase flow in nano‐pores, we employed molecular dynamics simulations on water/methane two‐phase flow in a hydrophilic SiO2 nanoslit, and obtained high‐quality data by applying the “pump method” and “nano‐manometer.” This study revealed the variation in phase distribution during flow process, and assessed the impact of water phase distribution on methane gas flow. We proposed the “Deformed Water Layer (DWL) model” based on physical mechanisms, which can precisely describe methane relative permeability and forecast the critical water saturation for forming water lock. Our results suggest a two‐stage transition in methane gas permeability with increasing water saturation within nano‐pores, governed by spatial deformation of water phase. This phenomenon underscores that maintaining a reduced groundwater saturation is imperative to facilitate superior gas permeability and enhance recovery efficacy. |
| format | Article |
| id | doaj-art-975f4fb27bbc4ef79f5808760418e616 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-975f4fb27bbc4ef79f5808760418e6162025-08-20T02:31:09ZengWileyGeophysical Research Letters0094-82761944-80072025-02-01524n/an/a10.1029/2024GL113458Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation StudyChao Zheng0Guang‐Jun Guo1Cheng Lu2Yanhui Dong3Bo Peng4Wei Tang5Bingyao Han6Key Laboratory of Deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences Beijing P.R. ChinaKey Laboratory of Deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences Beijing P.R. ChinaCenter of Oil & Natural Gas Resource Exploration China Geological Survey Beijing P.R. ChinaKey Laboratory of Deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences Beijing P.R. ChinaKey Laboratory of Deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences Beijing P.R. ChinaKey Laboratory of Deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences Beijing P.R. ChinaKey Laboratory of Deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences Beijing P.R. ChinaAbstract The intricate flow processes in nano‐pores pose limitations on the extraction of resources such as shale gas and gas hydrates. To observe water/gas two‐phase flow in nano‐pores, we employed molecular dynamics simulations on water/methane two‐phase flow in a hydrophilic SiO2 nanoslit, and obtained high‐quality data by applying the “pump method” and “nano‐manometer.” This study revealed the variation in phase distribution during flow process, and assessed the impact of water phase distribution on methane gas flow. We proposed the “Deformed Water Layer (DWL) model” based on physical mechanisms, which can precisely describe methane relative permeability and forecast the critical water saturation for forming water lock. Our results suggest a two‐stage transition in methane gas permeability with increasing water saturation within nano‐pores, governed by spatial deformation of water phase. This phenomenon underscores that maintaining a reduced groundwater saturation is imperative to facilitate superior gas permeability and enhance recovery efficacy.https://doi.org/10.1029/2024GL113458 |
| spellingShingle | Chao Zheng Guang‐Jun Guo Cheng Lu Yanhui Dong Bo Peng Wei Tang Bingyao Han Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation Study Geophysical Research Letters |
| title | Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation Study |
| title_full | Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation Study |
| title_fullStr | Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation Study |
| title_full_unstemmed | Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation Study |
| title_short | Water/Methane Two‐Phase Flow in the SiO2 Nanoslit Can Be Well Described via the Deformed Water Layer Model: A Molecular Simulation Study |
| title_sort | water methane two phase flow in the sio2 nanoslit can be well described via the deformed water layer model a molecular simulation study |
| url | https://doi.org/10.1029/2024GL113458 |
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