Seepage of Marine-Terrigenous Facies Coal Measures Shale

ZHANG Hongxue; LIU Weiqun

doi:10.11858/gywlxb.20180556

Volume 32 Issue 5

Aug 2018

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Chinese Journal of High Pressure Physics > 2018 > 32(5): 055901.

ZHANG Hongxue, LIU Weiqun. Seepage of Marine-Terrigenous Facies Coal Measures Shale[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 055901. doi: 10.11858/gywlxb.20180556

Citation:

ZHANG Hongxue, LIU Weiqun. Seepage of Marine-Terrigenous Facies Coal Measures Shale[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 055901. doi: 10.11858/gywlxb.20180556

ZHANG Hongxue, LIU Weiqun. Seepage of Marine-Terrigenous Facies Coal Measures Shale[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 055901. doi: 10.11858/gywlxb.20180556

Citation:

ZHANG Hongxue, LIU Weiqun. Seepage of Marine-Terrigenous Facies Coal Measures Shale[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 055901. doi: 10.11858/gywlxb.20180556

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Seepage of Marine-Terrigenous Facies Coal Measures Shale

doi: 10.11858/gywlxb.20180556

ZHANG Hongxue^1
,,
LIU Weiqun^{2, 3}

1.
School of Mechanics and Optoelectronics Physics, Anhui University of Science and Technology, Huainan 232001, China
2.
School of Mechanics & Civil Engineering, China University of Mining and Technology(Xuzhou), Xuzhou 221116, China
3.
State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology(Xuzhou), Xuzhou 221116, China

Received Date: 08 May 2018
Rev Recd Date: 04 Jun 2018

Abstract

Abstract

Using a pulse decay permeameter, we conducted a combination of laboratory experiments to study permeability evolution of marine-terrigenous facies coal measures shale under reservoir conditions, and obtained the permeability of coal measures shale under different stress states, and furthermore analyzed the permeability of coal measures shale and Wilcox shale.The results show that the permeability of coal measures shale ranges from 2.9×10^-19 to 5.7×10^-18 m² as the effective stress is decreased from 12.5 to 2.0 MPa at constant confining pressure (p_c=17 MPa), and is 2-3 orders of magnitude greater than that of Wilcox shale.The effective stress is given in terms of the external confining pressure and the internal pore pressure by σ_e=p_c-χp_p, where χ is approximately equal to 1.The fitting results of the experimental permeability show that the permeability of coal measures shale and Wilcox shale change exponentially with the effective stress, confining pressure (at constant pore pressure) or pore pressure (at constant confining pressure).
- marine-terrigenous facies,
- coal measures shale,
- Wilcox shale,
- permeability,
- effective stress

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References(21)

References

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Seepage of Marine-Terrigenous Facies Coal Measures Shale

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