Estimation of fracture relative permeabilities from unsteady state corefloods

A methodology to test the possible deviations of fracture relative permeabilities from straight-line relationship with saturation is discussed. It is shown that with matrix relative permeability data known, it is possible to obtain fracture relative permeabilities by history matching experimental data with double porosity numerical models output. Rather than linear saturation dependence, fracture relative permeability is a power law function of the corresponding phase saturation. The impact of several important parameters like double porosity formulation, capillary pressure and shape factor is discussed. It has been found that double porosity formulations (other than the double permeability model) could represent the flow in a fractured medium. (C) 2001 Published by Elsevier Science B.V.


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In the first part of this study, the accuracy of the JBN technique for the determination of heavy oil/water relative permeabilities, and the effect of temperature on relative permeabilities is examined by giving numerical as well as experimental examples. Using the JBN technique leads to a false temperature dependence of relative permeability curves. In the second part, we present unsteady state relative permeability experiments with initial brine saturation at differing temperatures conducted using South B...
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Citation Formats
S. Akın, “Estimation of fracture relative permeabilities from unsteady state corefloods,” JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, pp. 1–14, 2001, Accessed: 00, 2020. [Online]. Available: