Experimental Study On Optimization Of Deep Drive System Of Weak Gel In A Oil Field

In view of the current problems in a oilfield and the reservoir,fluid and other physical properties parameters and mining conditions,the development of water flooding prediction,and a large number of laboratory experiments,combined with the oil field has been taken to increase the effect of stimulation measures,it is believed that the block to carry out weak gel deep displacement technology to stabilize oil and water control feasible.In this paper,the selection and evaluation of the single agent for Deep drive in target block are carried out,the concentration of the single agent was optimized,and the reservoir properties and fluid properties of the blocks were evaluated,including the gel strength,the gel rate,the high temperature stability,The study of shear stability and the pre-crosslinking composite enhanced drive system;The mechanism of weak gel flooding and the advantages of comparing with traditional polymer flooding are summarized,and the oil field conditions such as temperature,salinity,fluid characteristics and reservoir characteristics of a oilfield are simulated,through a large number of indoor screening experiments and evaluation experiments,It is determined that the deep drive system suitable for a oilfield is composed of19 million molecular weight polyacrylamide and organic chromium cross-linking agent FL-3and anti-swelling agent CP-3 composition.The Stability Evaluation experiment of the system is carried out,and the experimental results show that the weak gel system has good thermal stability under A-oilfield conditions.The research results have laid a solid theoretical foundation for the application of weak gel flooding technology in the field of a oilfield.