通过吉林英东油田岩心数据分析,对低渗透储层单砂体内部高渗透段开展定量研究,建立渗透率级差法和累积渗透率贡献值法来定量求取低渗透储层单砂体内部高渗透段下限值,采用贝叶斯判别分析法建立不同渗透层段的判别函数,进行非取心井高渗透段的定量识别.结果表明:强水动力条件是其沉积成因,后期次生溶蚀孔是微观成因；河口坝微相的高渗透段主要分布在中部,长条状分布,长宽比4∶1,席状砂微相的高渗透段主要发育在单砂体内的中下部,连通性好,分布面积大,长宽比3∶2,水下分流河道的高渗透段分布在下部,顺着河道中心呈豆荚状零散分布,分布面积较小；可以采用泡沫气驱方式封堵高渗透段,扩大波及体积,提高高渗透段的剩余油采收率.%Quantitative identification of high permeability section in single sand body of low permeability reservoir was studied based on analysis of core data of Yingdong Oilfield, Jilin. Range method and contribution value method of accumulative permeability were summarized to calculate lower limit value of high permeability section in single sand body. Different discrimination function was established to determine high permeability section of non-coring wells by using Bayes method quantitatively. The results show that the strong hydrodynamic condition is sedimentary origin and secondary solution pore is the micro-cause of high permeability section. High permeability section of debouch bar microfacies develops in the middle part in a single sand body, and it shows long strip shape and its length to width ratio is 4 : 1. High permeability section of sheet sand develops in the lower-middle part in a single sand body, and it has good connectivity, wide distribution. Its length to width ratio is 3 : 2. High permeability section of underwater distributary channel develops'in the bottom of a single sandbody, which is podifrom distribution along central channel and its distribution area is small. At last the foam gas flooding is presented for sealing high permeability section and spreading sweeping volume, and the residue oil recovery can be enhanced.
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