Study On Macro Occurrence Pattern And Potential Tapping Measures Of Remaining Oil Of Daqing Sa North Oilfield

Currently the vast majority of domestic onshore oilfield has entered the development of the middle and later stages,the specific performance is big,the injection well injection fluid producing Wells moisture content is high,the distribution of remaining oil in the reservoir is very complex,result in oil field overall development difficulty is increasing day by day,severely restricted the overall oilfield development effect.Aimed at this situation,the system of the occurrence of the remaining oil in the reservoir is analyzed and summarized,and based on this,advances the corresponding exploration,to improve the oilfield development effect whole,will be able to ensure stable production.In this paper,on the basis of literature research and theory study,the reservoir numerical simulation and actual application of the method of combining the occurrence status of remaining oil in daqing,north oilfield are studied,firstly analyzes the affect oilfield remaining oil distribution state of macro geological and development factors,and the related control model is established,through analysis of the model,after the system is summarized,north oil field in the middle of the development of remaining oil distribution of the main types,including the collection massive continuous distribution,sporadic massive scattered distribution,local zonal distribution,the overall zonal distribution,edge shape distribution type,micro trap distribution type.On this basis,including horizontal well technology,the profile control water plugging technology,the secondary encryption technology and solution related the potentialities and advantages of water dynamics and characteristics as well as their respective adaptability were analyzed,and the state for more than six kinds of residual oil each corresponding reasonable exploration.Among them,the collection block continuous distribution adopts the technique of profile control and water shut-off to complete the excavation;The scattered mass dispersion distribution adopts the technique of profile control and water plugging,well network recombination technology and unstable water injection technology in hydrodynamic method to complete the excavation.The local layer zonal distribution adopts the technique of profile control and water plugging,well network encryption and recombination technology,and the water dynamics method to complete the excavation.The whole layer of zonal distribution pattern is accomplished by using well network encryption technique.The edge distribution is mainly used for horizontal well technology and well network encryption.The micro-trap distribution pattern is used for well-network encryption and recombinant technology.By Mr North oil field actual blocks on the basis of the recognition of residual oil occurrence state,the numerical simulation method,to adjust the before and after adopting corresponding exploration potential in the predict recovery factor,found that after adjusting recovery efficiency is increased by 1.46% to 3.27% before the adjustment,prove that the recognition of residual oil occurrence state and the corresponding exploration high reliability,good application and popularization value.