1887

Abstract

Summary

Recovery of gas from organic–rich shales has become a focus for resource development worldwide. Excess adsorption isotherms of methane at 35 , 50 , and 65 and pressure up to 12 MPa were measured on Lower Cambrian shales from Sichuan Basin of China. Classic adsorption models (Langmuir, Freundlich, and Dubinin–Astakhov equations) had been applied to model the experimental data, and tested their validity in the methane–shale systems. Both the Langmuir and Dubinin–Astakhov (D–A) equations are adequate for the adsorption data, but the D–A equation based on potential theory is found to be superior.

The assumption of energetically homogeneous surface in the Langmuir equation is not appropriate for shale, and Langmuir equation cannot satisfactorily match the volume adsorbed in low pressure (< 2MPa). All these subcritical models cannot describe supercritical adsorption data at high pressure (> 10 MPa), though no maximum was observed for the excess adsorption isotherms in the experimental pressure range.

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/content/papers/10.3997/2214-4609.201601140
2016-05-30
2024-04-25
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References

  1. Amankwah, K.A.G. and Schwarz, J.A.A.
    [1995] A modified approach for estimating pseudo-vapor pressures in the application of the Dubinin-Astakhov equation. Carbon, 33, 1313–1319.
    [Google Scholar]
  2. Chalmers, G. R. L. and Bustin, R.M.
    [2007] The organic matter distribution and methane capacity of the Lower Cretaceous strata of Northeastern British Columbia, Canada. International Journal of Coal Geology, 70, 223–239.
    [Google Scholar]
  3. Clarkson, C.R., Bustin, R.M. and Levy, J.H.
    [1997] Application of the mono/multilayer and adsorption potential theories to coal methane adsorption isotherms at elevated temperature and pressure. Carbon, 35, 1689–1705.
    [Google Scholar]
  4. Clarkson, C. and Haghshenas, B.
    [2013] Modeling of supercritical fluid adsorption on organic-rich shales and coal. Society of Petroleum Engineers.
    [Google Scholar]
  5. Dutta, P., Harpalani, S. and Prusty, B.K.
    [2008] Modeling of CO2 sorption on coal. Fuel, 87, 2023–2036.
    [Google Scholar]
  6. Rexer, T.F.T., Benham, M.J., Aplin, A.C. and Thomas, K.M.
    [2013] Methane adsorption on shale under simulated geological temperature and pressure conditions. Energy & Fuels, 27, 3099–3109.
    [Google Scholar]
  7. Ross, D.J.K. and Bustin, R.M.
    [2009] The importance of shale composition and pore structure upon gas storage potential of shale gas reservoirs. Marine and Petroleum Geology, 26, 916–927.
    [Google Scholar]
  8. Yang, F., Ning, Z.F. and Liu, H.Q.
    [2014] Fractal characteristics of shales from a shale gas reservoir in the Sichuan Basin, China. Fuel, 115, 378–384.
    [Google Scholar]
  9. Zhang, T.W., Ellis, G.S., Ruppel, S.C., Milliken, K. and Yang, R.S.
    [2012] Effect of organic-matter type and thermal maturity on methane adsorption in shale-gas systems. Organic Geochemistry, 47, 120–131.
    [Google Scholar]
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