Separate layer steam injection technology and application

In the middle and late steam injection period,the contradictions among each reservoir become increasingly prominent,and steam absorption capacity of each reservoir is in unequable,which influence the production degree of reservoirs seriously,finding expressions mainly in the decrease of oil production、high water-cut and so on,this paper presents separate layer steam injection technology.Using packers to divide alternate layers effectively,this separate layer steam injection technology carves up independent injection cells vertically,so that injection equipment are used in every layer separately.Therefore,the interferences between high permeable zone and low permeable zone、new and old layers、oil and water formation are eliminated during injection,so the potential of oil reservoir are displayed thoroughly and the producing degree of reservoirs are improved.This technique includes quantitative injection technology、separate layer steam injection technology、automatic steam injection technology. What's more,in view of some special oil wells,this technique also develops separate injection technology of sand exceeding wells and separate layer injection technology of sidetrack drilling wells.