摘要
高18块开发目的层为古近系沙河街组莲花油层Ⅰ~Ⅴ砂层组,为一受岩性-构造双重控制的块状砂岩底水油藏。常规注水水窜严重,吞吐注汽压力高、干度低、效果差,达不到标定采收率。在深入开展油藏地质、剩余油分布规律研究基础上,根据储层平面分区、纵向非均质性强的特点,制定了＂主体部位重构注采井网＋调驱、边部压裂改造＋高压注汽＂的分区二次开发思路,现场试验效果明显,预计日产油可达230t,最终采收率达22.4%,可提高采收率7.3%。
The target zone in Block Gao18,which was lithologic-structural controlled massive heavy oil reservoir with bottom water,wasⅠ~Ⅴsand body in Lianhua Reservoir of Tertiary Shahejie Formation.Serious water channeling was induced in conventional water flooding with high pressure,low dryness and poor effect in steam soaking;it could not reach the calibrated oil recovery.On the basis of deeply studying the reservoir geology,residual oil distribution law and according to the characteristics of plane partition of reservoirs and strong vertical heterogeneity,the idea of secondary development is provided,which includes the 'reconstruction of injection-production well pattern+profile control in the main location and fracturing and reconstruction+ high pressure steam injection in the edge,obvious effect is obtained in field testing.It is predicted that daily oil production would be 230 t,the ultimate oil recovery would be 22.4%,the oil recovery should be enhanced by 7.3%.
出处
《长江大学学报（自科版）（中旬）》
CAS
2015年第6期70-73,7,共4页
Journal of Yangtze University(Nature Science Edition)
基金
国家科技重大专项(2011ZX05053)
关键词
深层稠油
低速储量
储层特征
剩余油分布
分区二次开发
高18块
deep heavy oil
low rate reserves
reservoir characteristics
remaining oil distribution
partition secondary development
Block Gao18
