Research On The Control System Of Oil Extraction Joint Station Based On PLC

Xinmu oil field,located in south of the central depression of the songliao basin,the east-west fracture developed well with strong heterogeneity,is at a high water cut stage,about 90%.In the flooding development,many contradictions has been critical,such as water injection inefficient or invalid cycle seriously,and oil displacement efficiency low.Limited to geological conditions and cementing quality,injecting-water wells cannot be subdivided layers,resulting in water injection profile uneven,and interlayer interference serious.On the other hand,most remaining oil exists in the side of cracks,or the top of cyclothem,making it more difficult to develop the potential oil.In the development of old field at high water cut stage,adjusting projects and managing measures has no effects.Therefore,it is essecial to apply the technology of profile control and displacement,improving the effect of water injection,tapping the potential of residual oil at most.Pilot field trial of profile control and displacement technology has been taken in well M13-0019,in which plugging agent is injected about 11000 m3,changing horizontal flowing direction of water,raising injecting pressure,lowing liquid production,and finally obtaining favorable results.What is more,a new compound deep profile modification system adapted to 152 block in Xinmu oil field,and design methods are formed preliminarily,providing a practicable technique to improve the effect of water injection and oil recovery.