Experimental Study on Effects of Various Factors on Bottom-Water Reservoir Sweep Based on A Two-Dimensional Plate Physical Model

Abstract Horizontal Wells have obvious technical advantages in developing bottom-water reservoirs. Scholars at home and abroad have conducted many physical simulation studies on the development mechanism of horizontal wells in bottom-water reservoirs. In this paper, physical simulation experiments of sweep coefficients with or without intercalation and different displacement velocities, different permeability, different fluid viscosity and different reservoir thickness are carried out. The water sweep of the horizontal well bottom under different conditions is analyzed. The experimental results show that the existence of intercalation can delay the water appearance time, increase the anhydrous oil recovery period, and increase the final recovery factor. Controlling the liquid production rate can alleviate the bottom water coning phenomenon, expand the sweep area and increase the ultimate recovery factor. When the reservoir permeability is too high, the flow resistance is small, the water appearance is early, the anhydrous oil production period is short, and the final recovery factor is low. When the reservoir oil viscosity is high, the water sweep area is small and the final recovery factor is low. As the thickness decreases, it becomes easier for water to break through and reach a smaller area, resulting in lower final oil production.