苏丹Palogue油田CO_2吞吐效果影响因素分析  

Analysis of Influencing Factors on CO_2 Stimulation Response in Palogue Oilfield of Sudan

作　　者：梅士盛[1] 杨正明[1] 刘学伟[1] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007

出　　处：《新疆石油地质》2006年第5期643-645,共3页Xinjiang Petroleum Geology

摘　　要：针对苏丹Palogue油田3/7区Samaa组高孔高渗稠油油藏,进行CO2吞吐开采方式研究。通过实验,研究了CO2注入量、浸泡时间、井底流压等因素对CO2吞吐开采方式的影响。研究结果表明,浸泡时间对吞吐效果影响不大,井底流压对吞吐效果影响较大,存在最佳注入量,多次降压及吞吐前3周期效果较好。通过注入适当的气量、合理控制井底流压、采用多次降压的方式,可以在较少的吞吐轮次中取得较好的吞吐效果。该研究对CO2吞吐现场应用的设计具有一定的参考价值。The experimental research is made on application of CO2 stimulation process to Samaa heavy oil reservoir with high porosity and high permeability in Block 3/7 in Palogue oilfield of The Republic of Sudan, which includes the effects of CO2 injection rate, soak time and flowing bottom hole pressure on this process. The study shows that soak time has a restricted effect, but flowing bottom hole pressure has a big effect on it; there exist optimum CO2 injection rate; multiple pressure drawdown and anterior three cycles of CO2 stimulation will get a good response. It is concluded that proper CO2 injection rate, reasonably controlled flowing bottom hole pressure and making multiple pressure drawdown will obtain better responses in a few cycles of CO2 stimulations. These results could be as a guide for field application and design of CO2 stimulation process in Samaa heavy oil reservoir.

关 键 词：CO2吞吐 采出程度 换油率 

分 类 号：TE357.42[石油与天然气工程—油气田开发工程]