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利用岩心、测井资料开展流动单元研究,采用定性与定量相结合的方法,选择渗流系数、存储系数和夹层密度等参数将克拉玛依油田三3区克下组分为Ⅰ,Ⅱ,Ⅲ和Ⅳ类流动单元,并详细描述了各类流动单元的孔隙结构特征、分布规律及渗流能力特征。按流动单元进行了数值模拟研究,并分析了各类流动单元与剩余油分布的关系。研究表明:不同流动单元具有不同的渗流特征,从Ⅰ到Ⅳ类流动单元,毛细管压力曲线阀压不断增加,进汞曲线平缓段不断变短,最小润湿相饱和度大幅上升,残余油时水相相对渗透率不断下降,渗流能力不断下降;剩余油分布与储层流动单元类型密切相关,Ⅰ类流动单元水淹严重,Ⅱ和Ⅲ类流动单元是剩余油分布的相对富集区,Ⅳ类流动单元水淹较弱,但剩余油储量低。
Using the core and well logging data to carry out the flow cell research, the parameters of seepage coefficient, storage coefficient and interlayer density were selected by combining the qualitative and quantitative methods to classify the sub-components of Class III, Class III, Class IV in Karamay Oilfield Flow cell, and described in detail the pore structure characteristics, distribution and seepage capacity characteristics of various types of flow cells. The numerical simulation of flow units was carried out and the relationship between various types of flow units and remaining oil distribution was analyzed. The results show that different flow units have different seepage characteristics. From Ⅰ to Ⅳ flow units, the capillary pressure curve of the valve increases continuously, and the flat section of the mercury in the curve continuously shortens, the saturation of the minimum wetting phase increases sharply. The relative permeability decreases continuously and the seepage ability declines continuously. The distribution of remaining oil is closely related to the types of reservoir fluid units. Type I fluid units are severely flooded and Type II and III fluid units are the relative enrichment areas of remaining oil. Flooded units have weak flooding but low residual oil reserves.