CO2吞吐延长油井自喷期效果评价  

EVALUATION ON CO2 HUFF AND PUFF ON PROLONGING NATURAL FLOW LIFE OF PRODUCERS

作　　者：于春生[1] 赵金洲[1] 李闽[1] 李道轩[2] 

机构地区：[1]西南石油大学,四川成都610500 [2]胜利油田纯梁采油厂,山东博兴256504

出　　处：《大庆石油地质与开发》2009年第6期268-271,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：正理庄油田高89地区主力含油层系沙四上储层为低孔超低渗透薄互层，难以动用。投产初期部分油井自喷生产，但产量小，自喷期短。为延长油井自喷期，增加自喷期产量，对该地区开展了CO2吞吐数值模拟研究，评价了周期注入量、注气速度、焖井时间以及注入周期对延长油井自喷期效果的影响。研究结果表明：CO2吞吐可以延长油井自喷期，且可以收到较好的经济效益；针对不同储层物性的井，应适当调整周期注入量和焖井时间，以期经济效益最大化；注入周期数不宜过多，以2个周期为最佳。The main oil-bearing series Sd of Gao 89 area in Zhenglizhuang Oilfield, which are thin interbed layers with low porosity and extra-low permeability, are difficult to be employed. During early production, there were some natural flowing wells, but the production rate was low and natural flow lasted only a short period. In order to prolong the natural flowing life and to enhance synchronous production, numerical simulation of CO2 huff and puff was developed, besides, the effects of cyclic injection volume, injection rate, well shut-in time and injection cycle on prolonging flowing life of producers were evaluated. Results of the study indicate that CO2 huff and puff not only can prolong natural flowing life, but also can get preferable economic benefit. In view of different reservoir physical properties, cyclic injection volume and shut-in time should be adjusted to make the economic benefit maximized. Two cycles of CO2 injection should be enough.

关 键 词：CO2吞吐 单井 自喷期 吞吐效果 低渗油藏 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]