It is shown that the CDG injected has improved both the sweeping and oil displacing effeciencies of successive flooding water.

• 间 145井注入CDG后 ,对应 3口油井先后见效 ,产油量增加 ,含水大幅度减小 ,水驱特征曲线表明后续水驱的波及效率和驱油效率都有所提高。