Abstract

Steam injection is one of the popular methods for oil recovery enhancement. Success of this method to a significant extent depends on steam properties at a point of injection into a reservoir. A model of a steam flow through an injection tubing is developed. Heat losses from a flow to a surrounding formation are assumed to be quasi-steady state. A simplified model of a cylindrical reservoir at injection tubing end is introduced into the flow model to imitate realistic boundary conditions. Fluid thermodynamic parameters are calculated by using high-precision correlations. Computations performed are focused on high pressure – high temperature flow conditions. Effects of initial steam quality, fluid flow rate, different frictional pressure correlations and insulation thermal conductivity on distributions of steam quality, pressure and temperature along a vertical tubing are studied. An effect of initial steam conditions on a steam flow is also illustrated. A strong effect of hydrostatic pressure on a steam flow behavior is demonstrated.

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