期刊文献+

How moisture loss affects coal porosity and permeability during gas recovery in wet reservoirs? 被引量:3

How moisture loss affects coal porosity and permeability during gas recovery in wet reservoirs?
下载PDF
导出
摘要 Moisture in coal seams changes gas adsorption capacity, induces coal deformation, and affects coal porosity. However, fewer studies have investigated the dynamic process of moisture loss. In this study, a fully coupled multi-physical model for coal deformation, gas flow and moisture loss was implemented. It validated the coal-gas-moisture interactions of the decay of gas adsorption capacity and the coal shrinkage.Subsequently, the proposed model was applied to a simulation of coal seam gas recovery from wet reservoir and solved using the finite method in COMSOL Multiphysics 3.5. Analyses of the component factors and the sensitive parameters of moisture loss on coal porosity and permeability were comprehensively studied at last. The results reveal that moisture loss enhances coal porosity and permeability. The decay of gas adsorption capacity decreases coal permeability while the coal shrinkage promotes it. The decrease of the adsorption decay coefficient and the increase of the initial density of saturated water vapor and water evaporation constant can enhance the permeability of wet coal seams. Moisture in coal seams changes gas adsorption capacity, induces coal deformation, and affects coal porosity. However, fewer studies have investigated the dynamic process of moisture loss. In this study, a fully coupled multi-physical model for coal deformation, gas flow and moisture loss was implemented. It validated the coal-gas-moisture interactions of the decay of gas adsorption capacity and the coal shrinkage.Subsequently, the proposed model was applied to a simulation of coal seam gas recovery from wet reservoir and solved using the finite method in COMSOL Multiphysics 3.5. Analyses of the component factors and the sensitive parameters of moisture loss on coal porosity and permeability were comprehensively studied at last. The results reveal that moisture loss enhances coal porosity and permeability. The decay of gas adsorption capacity decreases coal permeability while the coal shrinkage promotes it. The decrease of the adsorption decay coefficient and the increase of the initial density of saturated water vapor and water evaporation constant can enhance the permeability of wet coal seams.
出处 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第6期899-906,共8页 矿业科学技术学报(英文版)
基金 provided by the National Natural Science Foundation of China(No.51404250) the financial support from Creative Research and Development Group Program of Jiangsu Province(No.2014-27) the Natural Science Foundation of Jiangsu Province(No.BK20140189)
关键词 COAL SEAM gas Porosity and permeability Coal-gas-moisture interaction MOISTURE loss Numerical simulation Coal seam gas Porosity and permeability Coal-gas-moisture interaction Moisture loss Numerical simulation
  • 相关文献

参考文献4

二级参考文献58

  • 1Frank Hungerford,Ting Ren,Naj Aziz.Evolution and application of in-seam drilling for gas drainage[J].International Journal of Mining Science and Technology,2013,23(4):534-544. 被引量:13
  • 2肖晓春,潘一山.考虑滑脱效应的煤层气渗流数学模型及数值模拟[J].岩石力学与工程学报,2005,24(16):2966-2970. 被引量:26
  • 3陈昌国,鲜晓红,张代钧,鲜学福.温度对煤和炭吸附甲烷的影响[J].煤炭转化,1995,18(3):88-92. 被引量:21
  • 4Saghafi A, Williams DJ. Estimation of methane emission from Australian coal mines. In: Proceedings of symposium on coalbed methane research and development in Australia, vol. 5. Townsville; 1992. p. 7-13.
  • 5Saghafi A, Williams DJ, Lama RD. Worldwide methane emissions from underground coal mining. In: Proceedings of the 6th international mine ventilation congress. Pittsburgh; 1997. p. 441-45.
  • 6Saghafi A, Day SJ, Fry R, Quintanar A, Roberts D, Williams DJ, Carras JN. Development of an improved methodology for estimation of fugitive seam gas emissions from open cut mining. Brisbane: ACARP Publication; 2005. p. 55.
  • 7Saghafi A, Roberts D, Fry R, Quintanar A, Day S, Lange T, Hoarau P, Dokumcu C, Carras JN. Evaluating a Tier 3 method for estimating fugitive emissions from open cut coal mining. Brisbane: ACARP Publication; 2008. p. 120.
  • 8Saghafi A. A Tier 3 method to estimate fugitive gas emissions from surface coal mining. IntJ Coal Geol 2012;100:14-25.
  • 9Australian Standards. Guide to the determination of gas content of coal-direct desorption method. Document AS 3980-1999. Sydney: Standards Association of Australia; 1999.
  • 10Williams DJ, Saghafi A, Drummond DB, Roberts DB. Development of a new equipment for rapid determination of coal gas content. In: Proceedings of symposium on coalbed methane research and development, vol. 4. Townsville; 1992. p. 21-30.

共引文献24

同被引文献26

引证文献3

二级引证文献15

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部