Impact of Velocity and Interfacial Tension on the Performance of Horizontal Wells in Gas Condensate Reservoirs

P. Ghahri, M. Jamiolahmady, and M. Sohrabi
Heriot Watt University, Edinburgh, United Kingdom

Drilling horizontal wells (HWs) has recently received renewed attentions with the increasing trend in exploitation of tight gas reservoirs. An accurate estimation of productivity of such systems using a numerical simulator is a challenging task, because its 3D simulation requires a fine grid exercise to capture the abrupt variation of fluid and flow parameters around the wellbore. This is cumbersome and impractical for field applications. In this work, COMSOL Multiphysics has been used to simulate 3D two-phase flow around a gas condensate HW under the steady-state conditions. The model accounts for phase and composition changes and dependency of relative permeability to velocity and interfacial tension (IFT). The governing equations are solved for pressure and gas fractional flow (GTR) distributions across the flow domains. The integrity of the model was verified by comparing some of its results with those obtained using fine grid option of a commercial compositional simulator under the same flow conditions.

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