Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production
Multiseam coalbed methane (CBM) exploitation can not only reduce single-well investment but also increase the length of service of the well and significantly enhance the CBM economic recovery of the entire basin. To compare with and further to guide the actual project of CBM production, this study p...
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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/10.1155/2021/6690218 |
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| _version_ | 1849304714591600640 |
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| author | Xiaoji Shang Zhizhen Zhang Yixin Niu Xiao Yang Feng Gao |
| author_facet | Xiaoji Shang Zhizhen Zhang Yixin Niu Xiao Yang Feng Gao |
| author_sort | Xiaoji Shang |
| collection | DOAJ |
| description | Multiseam coalbed methane (CBM) exploitation can not only reduce single-well investment but also increase the length of service of the well and significantly enhance the CBM economic recovery of the entire basin. To compare with and further to guide the actual project of CBM production, this study proposed a conceptual gas-water two-phase separate flow model for single coal seam considering the solubility of gas. This mathematical model was solved analytically by separation of variables and verified through history matching of the production data from the No. 3 seam of 1# test well of Jincheng and then applied to investigate the effect of gas solubility on the gas pressure. Furthermore, based on the coupled two-phase separate flow model of single seam, another two-phase separate flow model for the development of multicoal seam development was established. Similarly, the analytical solution of this model for multicoal seam layers was matched with the in situ data of TS-1 well of Liupanshui coal mine. It is found that the height difference and pressure difference between the two seams play key roles in the multiseam CBM development comprehensively. |
| format | Article |
| id | doaj-art-3ac0430d493946aca9c42c1fa6f2b142 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-3ac0430d493946aca9c42c1fa6f2b1422025-08-20T03:55:40ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66902186690218Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane ProductionXiaoji Shang0Zhizhen Zhang1Yixin Niu2Xiao Yang3Feng Gao4State Key Laboratory of Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaMultiseam coalbed methane (CBM) exploitation can not only reduce single-well investment but also increase the length of service of the well and significantly enhance the CBM economic recovery of the entire basin. To compare with and further to guide the actual project of CBM production, this study proposed a conceptual gas-water two-phase separate flow model for single coal seam considering the solubility of gas. This mathematical model was solved analytically by separation of variables and verified through history matching of the production data from the No. 3 seam of 1# test well of Jincheng and then applied to investigate the effect of gas solubility on the gas pressure. Furthermore, based on the coupled two-phase separate flow model of single seam, another two-phase separate flow model for the development of multicoal seam development was established. Similarly, the analytical solution of this model for multicoal seam layers was matched with the in situ data of TS-1 well of Liupanshui coal mine. It is found that the height difference and pressure difference between the two seams play key roles in the multiseam CBM development comprehensively.http://dx.doi.org/10.1155/2021/6690218 |
| spellingShingle | Xiaoji Shang Zhizhen Zhang Yixin Niu Xiao Yang Feng Gao Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production Geofluids |
| title | Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production |
| title_full | Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production |
| title_fullStr | Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production |
| title_full_unstemmed | Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production |
| title_short | Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production |
| title_sort | analytical solutions for gas water two phase flow in multiseam coalbed methane production |
| url | http://dx.doi.org/10.1155/2021/6690218 |
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