Study On The Multi-round Profile Control Technology Of Bohai Oilfield

In reaction to the phenomenon of bohai oilfield multi-round profile control technology research is still blank,the paper,taking SZ36-1 Oilfield II project as the research object.Appeared in the process of development of high permeability layer water flooding breakthrough and a single profile control recovery effectis limited,the paper study on multi-round profile control.From SZ 36-1 oilfield F08 well group multi-round profile control effect,the factors such as profile control timing,amount and strength have analyzed.On the basis of the gel system performance evaluation experiment and formula optimization,multi-round profile control agent system is available,it can satisfy different rounds of gel strength and gel time of need.In order to overcome the effect of profile control by rounds of decline phenomenon,respectively by using numerical simulation method for each rounds of profile control timing and dosage of multi-round profile control is optimized.On the selection of profile control timing,plugging agent utility connection problems should be paid attention to,After-round should be injection before previous rounds plugging agent failure.,To each one rounds,there is a optimal plugging agent dosage,for different rounds,each round increase dosage.In this paper,based on the above research results,a multi-round profile control process plan has been designed with F19 well group as the object,and hope to have a guiding role for oilfield.