Research on steam combination flooding test in low permeability oilfield

In view of low permeability,low reserves abundance and low single well productivity in Zhaoyuan oilfield,the adaptability of steam-fuel gas combination flooding is discussed in this paper with the application of 1D tubing physical model,and oil displacement efficiencies of each drive modes are used to evaluate the drive modes.Based on the research,the feasible development mode and injection parameters are determined.The study results suggest: the oil displacement characteristics of high temperature mixed gas(gas/steam ration = 1∶1) are better than those of 250 ℃ steam flooding;for bigger plug,the oil displacement efficiency is higher but lower than that of high temperature mixed gas(gas/steam ration = 1∶1) successive flooding.