RE-ENTRY TECHNIQUE OF HEAVY OIL RESERVOIR IN LIAOHE OILFIELD

The most petroleum deposit is heavy oil and the formation cementing is unconsolidated in Liaohe oilfield.Through the exploration and development of 40 years',the production of oilfield comes into middle-later period,the situation to increasing reserves and stable yields is out of condition.During heavy oil development,how to raise recovery rate,increase oil production and reduce the production cost has became very important.The re-entry technique for heavy oil wells is one of the effective approaches to increase the recovery efficiency of heavy oil reservoir.This technique has been used widely.The thesis mainly introduced the re-entry techniques used for heavy oil wells,and carried out the analysis about economic benefit.