摘要
通过对延长油田杏2005井区低渗油藏岩心渗透率实验,对比分析了不同的加压速度及方式对储层的影响,及降压生产与油藏压敏性之间的相关性,结果表明,对于低渗透油藏,控制采油速度,合理降低油藏生产压力,可减少渗透率损失,提高油藏最终采收率;地层压力下降太快造成的地层伤害很难得到恢复。
Through core permeability experiment of low permeability reservoirs in Xing2005 well block of Yanchang oilfield,by comparison and analysis of the influence of different compression speed and the manner on reservoirs,as well as the relationship between step-down production and the reservoir pressure sensitive resistance,the results show that for low permeability oil reservoir,the control of oil production rate and reasonable production pressure can reduce the permeability loss,improve the ultimate recovery of the reservoir.The formation damage caused by formation pressure falling so fast is difficult to be recovered.
出处
《石油地质与工程》
CAS
2014年第1期87-90,149,共4页
Petroleum Geology and Engineering
基金
陕西省科技厅重大科研专项"注水开发优化及配套提高采收率技术研究"(2010ZDKG-100)
关键词
延长油田
低渗透油藏
地层压力
渗透率损失
Yanchang oilfield
low permeability reservoir
formation pressure
permeability loss