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使用中国大港板桥油气田板Ⅱ组废弃凝析气藏的真实岩心和配制的流体，首先在PVT、中进行了CVD试验，然后在长岩心中进行衰竭试验达到8MPa废弃压力，并在保持8MPa下进行了注水速度敏感的实验对比．还开展了注水增加压力到20MPa后再进行恒压注水方式开发试验。研究表明，长岩心中衰竭实验凝析油采收率比PVT筒中CVD测试凝析油采收率高1倍，与实际气田衰竭式开发凝析油采收率相近。在废弃压力下注水进行注采平衡开发凝析油可新增采收率3．39％，天然气新增采收率10．11％，效果较好；在废弃压力下注水速度快，获得的凝析油采收率相对较高；采用注水恢复地层压力到20MPa后再进行注采平衡开发油采收率可新增0．68％，天然气采收率新增5．39％。根据实验，现场采用强注污水开发凝析气藏试验，提高了采收率，同时解决了现场污水处理问题，取得了明显的经济效益和社会效益。

In-House Experiment and Field Application for Abandoned Condensate Gas Reservoirs to Improve Recovery Ratio by Injecting Waste Water

Using real rock core from the abandoned conden sa te gas reservoir of Ban Group 2 in Dagang Banqiao Oil and Gas Field,and the mad e up fluid,CVD testing was first conducted in PVT cylinder.Then the depletion t esting was conducted in long core,reaching to 8 MPa of the abandoned pressure.Ke eping the pressure 8 MPa,the test comparison was done for the sensitivity to th e flooding rate.Also,increasing the flooding pressure to 20 MPa,the production test was conducted with constant pressure flooding.The results indicate that th e recovery ratio of condensate in the depletion experiment of the long core is 2 times of that measured by CVD testing in PVT cylinder,and similar to that of re al gas field exploited by depletion.The recovery ratio can increase 3.39% for c ondensate,and 10.11% for natural gas by flooding under the abandoned pressure wi th balanced injection and production rate.Under the abandoned pressure,the faste r the injection rate is, the higher the recovery ratio of condensate is.The rec overy ratio can increase 0.68% for condensate,and 5.39% for natural gas if the f ormation pressure is recovered to 20 MPa by flooding,then producing with balance d injection and production rate.According to the testing,exploiting condensate g as reservoirs by injecting waste water can improve the recovery ratio,and solve the problem of waste water processing at the same time,which has obvious benef it on economy and society.