缝洞型油藏CO_(2)驱注采参数和井位部署研究  

Research on injection and production parameters and well location deploymentof CO_(2) flooding in fractured and vuggy reservoirs

作　　者：丁佳惠 刘德华[1,2,3] 屈亚光 高海亮[1,2] Ding Jiahui;Liu Dehua;Qu Yaguang;Gao Hailiang(School of Petroleum Engineering,Changjiang University,Wuhan 430100,China;Hubei Provincial Key Laboratory of Oil and Gas Drilling and Production Engineering,Wuhan 430100,China;Hubei Shale Gas Engineering Research Center,Wuhan 430100,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430100 [2]湖北省油气钻采工程重点实验室,湖北武汉430100 [3]湖北省页岩气工程研究中心,湖北武汉430100

出　　处：《能源与环保》2023年第11期173-180,共8页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家科技重大专项(2016ZX05060-007)。

摘　　要：针对新疆某缝洞型油藏研究区块在注CO_(2)阶段存在的气驱效果递减、采收程度下降等问题,为了提高油藏采收率,对此阶段注气方式、采液强度以及注气周期3个注采参数进行数值模拟优化研究。结果表明,采用周期注气,原2.5倍采液强度,注10 d停10 d方式效果更佳。为了提高研究区的采收率,优化注采井位部署,对照该地区原始地质模型创建三维机理模型,研究二氧化碳驱替阶段注采井位分布的不同对采油效果的影响,优化井位部署,并将所得结论应用于现场生产。结果表明,注气井采用低部位井注气,高部位井采油效果更佳,同一注气井低部位射孔采油效果更佳,选择裂缝发育地带注气,不发育地带采油效果更佳。研究对同类缝洞型油藏高效开发具有一定的参考意义。In order to improve the oil recovery efficiency of a fractured and vuggy oil reservoir in Xinjiang,numerical simulation optimization was conducted on three injection and production parameters,namely gas injection method,liquid production intensity,and gas injection cycle,in response to the problems of decreasing gas drive effect and decreasing recovery degree during the CO_(2) injection stage in a research block.The results showed that using periodic gas injection,which is 2.5 times the original liquid production intensity,and stopping for 10 days after injection,has a better effect.In order to improve the recovery rate of the research area and optimize the deployment of injection and production wells,a three-dimensional mechanism model was created based on the original geological model of the area.The impact of different distribution of injection and production wells during the carbon dioxide displacement stage on oil recovery efficiency was studied,and the deployment of well positions was optimized.The obtained conclusions were applied to on-site production.The results show that gas injection wells use low position wells for gas injection,while high position wells have better oil recovery effects.The same gas injection well has better oil recovery effects through low position perforations.Gas injection in areas with developed fractures and areas without developed fractures have better oil recovery effects.The conclusion is that this research content has certain reference significance for the efficient development of similar fractured and vuggy reservoirs.

关 键 词：缝洞型油藏 CO_(2)驱 数值模拟 参数优化 井位部署 

分 类 号：TE345[石油与天然气工程—油气田开发工程]