Florence, Francois-Andre (2003-05). Validation/enhancement of the "Jones-Owens" technique for the prediction of permeability in low permeability gas sands. Master's Thesis. Thesis uri icon


  • This work presents the validation and enhancement of existing correlations for estimating and predicting
    the permeability in low permeability gas sands. The "original" problem of predicting the corrected or
    "liquid equivalent" permeability has been under investigation since the early 1940s ?????? in particular, using
    the application of "gas slippage" theory to petrophysics by Klinkenberg.
    In the first part of this work, the viability of the Jones-Owens and Sampath-Keighin correlations for
    estimating the Klinkenberg-corrected (absolute) permeability from single-point, steady-state measurements
    were investigated. We also provide an update to these correlations using modern petrophysical
    In the second part of this work we proposed and validated a new "microflow" model for the evaluation of
    an equivalent liquid permeability from gas flow measurements. This work was based on a more detailed
    application of similar concepts employed by Klinkenberg. In fact, we obtained the Klinkenberg result as
    an approximate form of this result. A theoretical "microflow" result was given as a rational polynomial
    (i.e., a polynomial divided by a polynomial) in terms of the Knudsen number (ratio of the mean free path
    of the gas molecules to the characteristic flow length (typically the radius of the capillary)), and this result
    can be applied as an explicit correlation device, or as an implicit prediction model (presuming the model is
    tuned to a particular data set).
    The following contributions are derived from this work:
    ?????? Validation and extension of the correlations proposed by Jones-Owens and Sampath-Keighin for low
    permeability samples.
    ?????? Development and validation of a new "microflow" model which correctly represents the flow of gases
    in low permeability core samples. This model is also applied as a correlation for prediction of the
    equivalent liquid permeability in much the same fashion as the Klinkenberg model, although the new
    model is substantially more theoretical (and robust) as compared to the Klinkenberg correction model.

publication date

  • May 2003