The Jurassic oil reservoir in Jiyuan oilfield is affected by high liquid production intensity and advancing edge and bottom water,resulting in a rapid increase in water content and a significant decrease in production.In the early stage,the effect of polymer micro-sphere flooding and PEG profile control was not significant,and the process adaptability was poor.Therefore,the profile control technology experiment of viscoelastic self-regulating a-gent in Jurassic reservoirs was carried out.The agent enters the bottom water layer and has low shear and high viscosity in large pores.Entering the upper oil layer,the viscosity is low and the flow rate is fast in small pores,which can achieve the effect of"blocking water without blocking oil".Indoor evaluation and on-site application of 6 well groups were car-ried out on site,achieving good oil displacement and decline reduction effects,effectively al-leviating the water drive contradiction in the reservoir,and achieving effective extraction of remaining oil in the block.
关键词
JY油田/延9油藏/黏弹自调控剂/调剖
Key words
JY oilfield/Yan 9 reservoir/viscoelastic self-regulating agent/profile control
维普
万方数据