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Insights on the gas permeability change in porous shale

已有 493 次阅读 2018-1-13 16:53 |个人分类:AGER期刊|系统分类:论文交流| 期刊 |文章来源:转载

Insights on the gas permeability change in porous shale

Junqian Li, Tao Yu, Xu Liang, Pengfei Zhang, Chen Chen, Jie Zhang

(Published: 2017-09-25)

Corresponding Author and Email: Junqian Li, lijunqian1987@126.com

Citation: Li, J., Yu, T., Liang, X., et al. Insights on the gas permeability change in porous shale. Adv. Geo-energ. Res. 2017, 1(2): 69-73, doi: 10.26804/ager.2017.02.01.

Article Type: Invited review

Abstract:
Due to abundant nanoscale pores developed in shale, gas flow in shale presents a complex dynamic process. This paper summarized the effects from effective stress increase, shale matrix shrinkage, gas slippage and Knudsen diffusion on the gas permeability change in shale during shale gas recovery. With the reduce in gas pressure, effective stress increase leads to the decline of the permeability in an exponential form; the permeability increases due to the shale matrix shrinkage induced by gas desorption; appearances of gas slippage and Knudsen diffusion cause an additional increase in the gas permeability particularly in small pores at low pressures. In addition, some reported models evaluating the shale permeability were reviewed preliminarily. Models considering these four effects may be potentially effective to evaluate the gas permeability change in shale.


Keywords: Shale gas, permeability, effective stress, matrix shrinkage, gas slippage, Knudsen diffusion.

论文网址: http://www.astp-agr.com/index.php/Index/Index/detail?id=25

Insights on the gas permeability change in porous shale.pdf




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