Top-Injection and Bottom-Production(Tinbop)Cyclic Steam-Injection Method Enhances Oil Recovery

摘要

We have developed a novel method to enhance oil production during cyclic steam injection.In the Top-Injection and Bottom-Production(TINBOP)method,the well contains two strings separated by two packers(a dual and a single packer): the short string(SS)is completed in the top quarter of the reservoir,while the long string(LS)is completed in the bottom quarter of the reservoir.The method requires an initial warm-up stage where steam is injected into both strings for 21 days;then the LS is opened to production while the SS continues to inject steam for 14 days.After the initial warm-up,the following schedule is repeated:the LS closed and steam is injected in the SS for 21 days;then steam injection is stopped and the LS is opened to production for 180 days. There is no soak period.