Modeling the acidizing of a horizontal well opening a carbon-bearing oil reservoir

The model of two-phase seepage flow occurring when oil is displaced by an acid solution in the neighborhood of a horizontal well is considered with account for flow in the well bore. The effect of acid activation and acid fracturing is studied. The influence of the phase permeability variations accompanying the rock break-up on the treatment result is estimated. The nonuniformity of the inflow distribution along the horizontal bore is shown to increase as a result of the acidizing. Numerical calculations are carried out for actual situations.