Volume 7 Issue 2 - July 2016

  • 1. A comparative evaluation of adsoprtion isotherm in clay- dominated shale

    Authors : Hayatu Bashir, Yu Wang, Martin Burby

    Pages : 269-281

    DOI : http://dx.doi.org/10.21172/1.72.545

    Keywords : Adsorption isothermMethane adsorptionclay rich shale

    Abstract :

    One of the bottlenecks of production in an unconventional resource like shale is the issue of adsorbed gas. The process of quantifying adsorption is through experimental methods and the results fit to an isotherm to determine the total adsorbed gas. In this study, we fit four methane adsorption experimental datasets on mineral dominated shale selected from literature of inorganic components of shale to the Langmuir, Freundlich, Sips or Freundlich-Langmuir, Redlich-Paterson isotherm to determine the best fit. In order to determine the goodness of fit to isotherm model, we used three statistical criterions which are; the correlation coefficient (r2), standard errors (S.E.) and residual plot for each parameter to evaluate the data. The Langmuir isotherm is usually adopted as the ideal isotherm which describes adsorption capacity in shale reservoir. It is shown in this work that compared to the Langmuir, Freundlich and Sips or Freundlich-Langmuir, the Redlich-Paterson isotherm describes adsorption of clay rich shale more accurately. The modelling results showed that Redlich-Paterson model fits experimental data better than the other three isotherms, with relatively higher r2 values and smaller S.E.

    Citing this Journal Article :

    Hayatu Bashir, Yu Wang, Martin Burby, "A comparative evaluation of adsoprtion isotherm in clay- dominated shale", https://www.ijltet.org/journal_details.php?id=906&j_id=3249, Volume 7 Issue 2 - July 2016, 269-281, #ijltetorg