缝洞型油藏全直径岩心注气驱油实验研究  

Experimental Study on Oil Flooding by Full Diameter Core Gas Injection in Fractured-Vuggy Reservoir

作　　者：史锋刚[1] 郑继龙[1] 乔砚佳 

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《精细石油化工进展》2016年第3期9-11,共3页Advances in Fine Petrochemicals

基　　金：国家科技重大专项基金资助项目(2011ZX05024-002-001)

摘　　要：以缝洞型油藏为研究对象,基于缝洞型油藏全直径岩心,模拟油藏温度、压力条件,考察该缝洞型油藏水驱后期注N_2,CO_2和天然气提高采收率的驱油效果。结果表明:前期水驱对储层底部原油采出程度高;气驱主要对储层"阁楼油"进行驱替并将其空间位置降低,N2驱提高采收率最低,为7.16%;CO_2驱提高采收率最大,为17.35%;后期水驱过程中,N2驱提高采收率最大,为22.28%;CO_2驱提高采收率最低,为5.53%。结合现场施工情况,建议缝洞型油藏注气驱油开发中使用N_2作为注入气。A fractured-vuggy reservoir was studied,and the flooding effect on enhancing oil recovery of injecting N2,CO2 and natural gas through full diameter core at the later stage of water flooding was investigated by simulating the temperature and pressure of this fractured-vuggy reservoir. The results of study have shown that the crude oil recovery from reservoir bottom is high when water flooding is adopted,gas flooding is helpful in displacing the ＂ attic oil＂ in the reservoir and lowering its spacial location,and the recovery efficiency is7. 16%,the lowest,when N2 flooding is adopted,and is 17. 35%,the highest,when CO2 flooding is adopted at the early stage,and that the enhancement of recovery efficiency is,22. 28%,the highest,when N2 flooding is adopted,and is 5. 53%,the lowest,when CO2 flooding is adopted at the later stage. It is suggested after taking on-site construction and economic cost into account that N2 is used as the injected gas when developing fractured-vuggy reservoir by gas injection oil flooding technology.

关 键 词：缝洞型油藏 全直径岩心 注气驱油 提高采收率 阁楼油 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]