Modified experimental method to investigate micro transport in the shale matrix for shale gas production
Matrix permeability is the primary transport property for shale gas recovery, due to the special production process of gas from matrix to wellbore. With the micro pore size of shale matrix, it is necessary to consider micro transport mechanisms for the obtained permeability from macro experimental t...
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Frontiers Media S.A.
2023-09-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1260499/full |
| _version_ | 1797688891722956800 |
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| author | Zantong Hu Yonghong Deng Jingxuan Li Xiaojun Wu Xiaojun Wu Jinmei Bai Junqiang Tian |
| author_facet | Zantong Hu Yonghong Deng Jingxuan Li Xiaojun Wu Xiaojun Wu Jinmei Bai Junqiang Tian |
| author_sort | Zantong Hu |
| collection | DOAJ |
| description | Matrix permeability is the primary transport property for shale gas recovery, due to the special production process of gas from matrix to wellbore. With the micro pore size of shale matrix, it is necessary to consider micro transport mechanisms for the obtained permeability from macro experimental techniques. In this study, the macro experimental permeability was investigated in micro way, by the analyzation of pressure drop curves of shale matrix at high- and low-pressure experimental conditions, with modified numerical model containing micro transport mechanisms. As selected parameters, porosity, pore radius and tortuosity were regressed to obtain apparent permeabilities of three samples. The analysis shows that, tortuosity is much higher than macro one, and has been proved to be necessary and reasonable. The Knudsen diffusion and slippage effect control the micro transport of shale matrix at low and high pressure, separately, which is the main difference of macro and micro transports. Slippage flow weight factor helps to increase of slippage flow proportion with pressure. Higher pore radius and tortuosity both could weaken the effect of Knudsen diffusion, and slippage flow appears positive relationship with pore size at high pressure. This research provides an inspiration to shale transport study and a micro perspective theoretical guidance for the macro recovery of in-site shale gas reservoir. |
| first_indexed | 2024-03-12T01:37:07Z |
| format | Article |
| id | doaj.art-563dc90a6a8941ffbf620993327dc26e |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-12T01:37:07Z |
| publishDate | 2023-09-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Energy Research |
| spelling | doaj.art-563dc90a6a8941ffbf620993327dc26e2023-09-11T05:08:04ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-09-011110.3389/fenrg.2023.12604991260499Modified experimental method to investigate micro transport in the shale matrix for shale gas productionZantong Hu0Yonghong Deng1Jingxuan Li2Xiaojun Wu3Xiaojun Wu4Jinmei Bai5Junqiang Tian6Exploration and Development Integration Center of Zhejiang Oil Field, Hangzhou, ChinaPetroChina Coalbed Methane Company Limited, Beijing, ChinaPetroChina Coalbed Methane Company Limited, Beijing, ChinaSchool of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou, ChinaDepartment of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, ChinaSchool of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou, ChinaSchool of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou, ChinaMatrix permeability is the primary transport property for shale gas recovery, due to the special production process of gas from matrix to wellbore. With the micro pore size of shale matrix, it is necessary to consider micro transport mechanisms for the obtained permeability from macro experimental techniques. In this study, the macro experimental permeability was investigated in micro way, by the analyzation of pressure drop curves of shale matrix at high- and low-pressure experimental conditions, with modified numerical model containing micro transport mechanisms. As selected parameters, porosity, pore radius and tortuosity were regressed to obtain apparent permeabilities of three samples. The analysis shows that, tortuosity is much higher than macro one, and has been proved to be necessary and reasonable. The Knudsen diffusion and slippage effect control the micro transport of shale matrix at low and high pressure, separately, which is the main difference of macro and micro transports. Slippage flow weight factor helps to increase of slippage flow proportion with pressure. Higher pore radius and tortuosity both could weaken the effect of Knudsen diffusion, and slippage flow appears positive relationship with pore size at high pressure. This research provides an inspiration to shale transport study and a micro perspective theoretical guidance for the macro recovery of in-site shale gas reservoir.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1260499/fullshale matrixpermeabilitygas transportKnudsen diffusionslippage effect |
| spellingShingle | Zantong Hu Yonghong Deng Jingxuan Li Xiaojun Wu Xiaojun Wu Jinmei Bai Junqiang Tian Modified experimental method to investigate micro transport in the shale matrix for shale gas production Frontiers in Energy Research shale matrix permeability gas transport Knudsen diffusion slippage effect |
| title | Modified experimental method to investigate micro transport in the shale matrix for shale gas production |
| title_full | Modified experimental method to investigate micro transport in the shale matrix for shale gas production |
| title_fullStr | Modified experimental method to investigate micro transport in the shale matrix for shale gas production |
| title_full_unstemmed | Modified experimental method to investigate micro transport in the shale matrix for shale gas production |
| title_short | Modified experimental method to investigate micro transport in the shale matrix for shale gas production |
| title_sort | modified experimental method to investigate micro transport in the shale matrix for shale gas production |
| topic | shale matrix permeability gas transport Knudsen diffusion slippage effect |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1260499/full |
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