Research and experiment on the shallow thin layer super—heavy oil superheated steam drive development——take Louzi 27 well area as example

In view of the characteristics of Louzi 27 wellarea shallow thin layer super-heavy oil reservoir, the feasibility study of overheated steam drive development mode hasbeen carried out. The findings indicated that the development mode is suitable to Louzi 27 well area shallow thin layer super-heavey oil development. Comparing the wet steamdrive, it raises the recovery ratio 8. 24 percentage points, enhances the oil vapor ratio 0. 077. Through optimizing injection and production parameters, four well groups have beenpicked to carry out overheated steam drive experiment, itforecasted that production degree reach to 26. 28% by thesteam drive and the steam injection+steam drive recoveryratio is 49.61%.