气水交替驱CO_2注入界限研究  

The study of the CO_2 injection boundary in the water alternating gas

作　　者：马超群[1] 黄磊 罗璇[1] 范虎[1] 万单梁[1] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室 [2]中国石油渤海钻探第二钻井分公司

出　　处：《油气地球物理》2012年第2期31-34,共4页Petroleum Geophysics

基　　金：中国石油化工股份公司科技攻关项目(编号:P06063)

摘　　要：通过机理模型,研究了M1油藏CO2驱气水交替注入的主要技术参数,并在此基础上,结合各井组地质模型,利用正交实验设计确定了各井组最优气水交替注入方案。结果表明,气水交替注入时除了CO2注入量、注入气体浓度、CO2注入速度、注水速度、CO2段塞数、气水段塞比等因素外,焖井时间和前、后段塞比都会对开发效果产生影响,但这两个因素在此之前并没有引起人们的重视。同水驱效果相比,开采后期气水交替注入的采油量有了明显提高,而含水率却比水驱低。因此,CO2驱气水交替可以在M1油藏使用。The main technical parameters of water alternating gas （WAG） of CO2 flooding in M1 reservoir is studied by the mechanism model, and based on this, the best WAG injection scheme of each well group are determined by the orthogonal experimental design combined with the geological model of each well group. The result show that except for the injection rate of CO2, the concentration of injected gas, input speed of CO2, flooding rate, the number of CO2 slug, the ratio of CO2-water slug, the stew time and front-following slug ratio, which are ignored, also have an impact on the result of WAG. Compared with the effect of water flooding, the oil production has been obviously improved by the water alternating gas in later stage of recovery, and the water cut is lower than that by the water flooding, so the water alternating gas can be used in M1 reservoir.

关 键 词：气水交替注入 正交实验设计 焖井时间 前后段塞比 

分 类 号：TE357.44[石油与天然气工程—油气田开发工程]