1887

Abstract

Summary

Existing rarefied gas flow models cannot accurately characterize gas flow behaviors in nano-porous media by coupling various empirical rarefaction and diffusion coefficients. Also, almost all models overlook the importance of non-ideal gas effect on the flux and apparent permeability. In this work, a unified model for nonideal rarefied gas flow in nano-porous media has been developed. More specifically, a straight capillary tube consisting of a viscous flow zone and a Knudsen diffusion zone is sectioned by an analytically derived boundary. Subsequently, the apparent permeability is obtained by coupling weighted flow mechanisms and extended to the porous media considering the roughness, rarefaction, and real gas effect. It has been found the apparent permeability hardly change when pressure is over 10.0 MPa and pore size is larger than 100 nm. Sensitivity analysis shows the apparent permeability is strongly dependent on pore size and weakly dependent on roughness. Finally, it is observed that real gas effect decreases the flux of the new model at high pressures. The developed model is an easy-to-use tool for gas transport in tight porous media and can be integrated in large-scale simulations to optimize the long-term production performance of unconventional reservoirs.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201802205
2018-09-03
2024-04-20
Loading full text...

Full text loading...

References

  1. Beskok, A. and Karniadakis, G.E.
    [1999] A model for flows in channels, pipes, and ducts at micro and nano scales.Microscale Thermophysical Engineering, 3(1), 43–77.
    [Google Scholar]
  2. Bird, R.B., Stewart, W.E. and Lightfoot, E.N.
    [2007] Transport Phenomena. Second Edition, John Wiley and Sons Incorporation, Hoboken, NJ.
    [Google Scholar]
  3. Burnett, D.
    [1935] The distribution of molecular velocities and the mean motion in a non-uniform gas.Proceedings of the London Mathematical Society, 39(2), 382–435.
    [Google Scholar]
  4. Civan, F.
    [2010] Effective correlation of apparent gas permeability in tight porous media.Transport in Porous Media, 82(2), 375–384.
    [Google Scholar]
  5. Darabi, H., Ettehad, A., Javadpour, F. and Sepehrnoori, K.
    [2012] Gas flow in ultra-tight shale strata.Journal of Fluid Mechanics, 710, 641–658.
    [Google Scholar]
  6. Ertekin, T., King, G. and Schwerer, F.
    [1986] Dynamic gas slippage, a unique dual-mechanism approach to the flow of gas in tight formations.SPE Journal,1(1), 43–52.
    [Google Scholar]
  7. Ewart, T., Perrier, P., Graur, I. and Meolans, J.G.
    [2007] Tangential momentum accommodation in microtube.Microfluid Nanofluidics, 3(6), 689–695.
    [Google Scholar]
  8. Haimes, Y.Y., Lasdon, L.S. and Wismer, D.A.
    [1971] On a bicriterion formulation of the problems of integrated system identification and system optimization.IEEE Transactions on Systems, Man and Cybernetics, 1(3), 296–297.
    [Google Scholar]
  9. Heidaryan, E. and Jarrahian, A.
    [2013] Natural gas viscosity estimation using density based models.Canadian Journal of Chemical Engineering, 91(6), 1183–1189.
    [Google Scholar]
  10. Jarrahian, A. and Heidaryan, E.
    [2014] A simple correlation to estimate natural gas viscosity.Journal of Natural Gas Science and Engineering, 20, 50–57.
    [Google Scholar]
  11. Javadpour, F., Fisher, D. and Unsworth, M.
    [2007] Nanoscale gas flow in shale gas sediments.Journal of Canadian Petroleum Technology, 46(10), 55–61.
    [Google Scholar]
  12. Javadpour, F.
    [2009] Nanopores and apparent permeability of gas flow in mudrocks (shales and siltstone).Journal of Canadian Petroleum Technology, 48(8), 16–21.
    [Google Scholar]
  13. Kennard, E.H.
    [1938] Kinetic Theory of Gasses.McGraw-Hill Book Co. Inc., New York.
    [Google Scholar]
  14. Landry, C.J., Prodanović, M. and Eichhubl, P.
    [2016] Direct simulation of supercritical gas flow in complex nanoporous media and prediction of apparent permeability.International Journal of Coal Geology.159, 120–134.
    [Google Scholar]
  15. Loucks, R.G., Reed, R.M., Ruppel, S.C. and Jarvie, D.M.
    [2009] Morphology, genesis, and distribution of nanometer-scale pores in siliceous mudstones of the Mississippian Barnett shale.Journal of Sedimentary Research, 79(12), 848–861.
    [Google Scholar]
  16. Loyalka, S. and Hamoodi, S.
    [1990] Poiseuille flow of a rarefied gas in a cylindrical tube, solution of linearized Boltzmann equation.Physics of Fluids A: Fluid Dynamics, 2(11), 2061–2065.
    [Google Scholar]
  17. Mahmoud, M.A.
    [2013] Development of a new correlation of gas compressibility factor (Z-factor) for high pressure gas reservoir.North Africa Technical Conference and Exhibition,SPE, Cairo, Egypt.
    [Google Scholar]
  18. Michalis, V.K., Kalarakis, A.N., Skouras, E.D. and Burganos, V.N.
    [2010] Rarefaction effects on gas viscosity in the Knudsen transition regime.Microfluid Nanofluid, 9, 847.
    [Google Scholar]
  19. Roth, A.
    [1982] Vacuum Technology (Revised 2nd edition).Elsevier, Amsterdam: North Holland.
    [Google Scholar]
  20. Schaaf, S.A. and Chambre, P.L.
    [1961] Flow of rarefied gases.Princeton University Press, Princeton.
    [Google Scholar]
  21. Tison, S.A.
    [1993] Experimental data and theoretical modeling of gas flows through metal capillary leaks.Vacuum, 44(11–12), 1171–1175.
    [Google Scholar]
  22. Veltzke, T. and Thöming, J.
    [2012] An analytically predictive model for moderately rarefied gas flow.Journal of Fluid Mechanics.698, 406–422.
    [Google Scholar]
  23. Wu, K.L., Li, X.F., Guo, C.H., Wang, C.C. and Chen, Z.X.
    [2016] A unified model for gas transfer in nanopores of shale gas reservoirs: coupling pore diffusion and surface diffusion.SPE Journal, 21(5), 1583–1611.
    [Google Scholar]
  24. Zoback, M.D. and Arent, D.J.
    [2014] Shale gas development opportunities and challenges.Proceedings of the National Academy of Sciences.44, 16–23.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201802205
Loading
/content/papers/10.3997/2214-4609.201802205
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error