碳酸盐岩油藏改善注水开发效果试验研究

双重孔隙介质的碳酸盐岩油藏在稳定注水采油后岩块系统还存在大量剩余油，而不稳定注水方法可在一定程度上提高水驱油效率。室内物理模型实验、数值模拟计算及现场试验结果一致表明：在碳酸盐岩油藏注水开发后期采用衰竭式降压开采，周期注水等不稳定注水方式，能够提高水驱油效率，改善油藏开发效果，获得良好的经济效益。

Research on improving the water flooding development of car-bonate reservoir

After stable waterflooding oil recovery,a lot of remaining oil still exists in rock blocksystern in dual-porosity carbonate reservoirs; Unstable water injection methods may raisewaterflooding oil recovery efficiency to a certain extent. The results of laboratory physicalmodeling,numerical simulation and field test show that unstable water injection methodssuch as depletion drive and periodic water injection which are done in the late period of wa-terflooding oil recovery of carbonate reservoir can bring high oil recovery ratio,improvedreservoir development and good economic benefit.