Modification of Esmaeilzadeh–Roshanfekr equation of state to improve volumetric predictions of gas condensate reservoir

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• 作者：F. Esmaeilzadeh ; F. Samadi
• 关键词：Modified ER equation of state ; Gas condensate ; Volume shift
• 刊名：Fluid Phase Equilibria
• 出版年：2008
• 出版时间：25 May 2008
• 年：2008
• 卷：267
• 期：2
• 页码：113-118
• 全文大小：407 K

文摘

A relative permeability rate effect for both gas and condensate phases was observed when using steady-state and unsteady-state testing methods. The tests were repeated at increasing flow rates which showed that the relative permeability of both phases increased with the increase in flow rate. Increasing the value of interfacial tension between the phases reduced the relative permeability of the gas phase more than the condensate phase; but the relative permeability of both phases continued to increase at higher flow rates. The influence of core end-effects was shown to be negligible at the low IFT conditions used in the tests. The Reynolds number indicated that flow was within the laminar regime at all test conditions. The observed rate effect was contrary to that of the conventional non-Darcy flow where the effective permeability decreases with increasing flow rates. Relative permeability tests conducted with conventional gas-oil fluids at similar test conditions did not exhibit any significant rate effects.

This study is applicable to the vicinity of producing wells, where the rate effect on gas relative permeability can significantly affect well productivity.