Development Effect Evaluation And Development Strategy Of L Oilfield At Ultra-high Water-cut Stage

Most of the oil fields in China have entered the middle-high water-cut stage,even the ultrahigh water-cut stage.In different production stages,especially in the ultra-high water-cut stage,reservoir development must face the problems of high water-cut stage,high recover of the recoverable reserve and discrete distribution of remaining oil etc.But this kind of oil field still has considerable development potential,so how to tap its potential and improve oil recovery is the most important task at present.According to the actual block,with the method of grey correlation analysis and fuzzy mathematics,this paper proposing a system of water flooding development effect evaluation method,which can effectively solve the problem of uncertainly of conventional water flooding development effect ecaluation.On the basis of the evaluation,we fully understand the characteristics and development status of the reservoir in ultra-high water-cut stage,and deduce the characteristic curve of water drive.Using of the liner displacement difference method,the least square method and the multiple linear regression method to solve the water flooding characteristic curve,and predict the potential of single well.The Arps decline law with the primary,the two type and the exponential type water drive characteristic curve are used to derive the new model.The prediction model of water content and the degree of recovery with time are obtained.By using the method of numerical simulation,analysis of the distribution of the remaining oil from the plane heterogeneity,interlayer hererogeneity and heterogeneity of layer,summarizes the distribution of remaining oil.Finally,according to the characteristics of the remaining oil distribution,the paper puts forward the development countermeasure,the development plan,and carries on the simulation verification.