Technology of separate layer water injection on inclined shaft in Nanpu Oilfield

A new type separate layer water injection and testing technology was put forward to use in high angle deviated hole.

The quality of layering water injection is up to stealing state of packer under layering water injection well in direct,and it influences on the effectiveness of water injection seriously in the oil field.

Concrete actions include that conception design for initial production is made, local well pattern adjustment is carried out during stable production, layering water injection is conducted, well pattern is reconstructed at production decline period a.

Research and application of separate layer steam injection technology;

The separate layer steam injection is the most commonly used and effective technology in the mid-later stage of the heavy oil exploitation for increasing reservoir producing ratio.

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.

Compared and analyzed current separate layer injection technology,provide a new eccenter separate layer injection idea of alkaline-surfactant-polymer,can realize separate layer injection by a special eccenter injection tool.