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在对现代嫩江大马岗段河流沉积物探槽剖面密集取样和实验室内样品分析的基础上 ,利用探槽剖面附近的参数井的测井综合解释结果 ,结合探槽剖面上相应位置处的样品粒度分析结果 ,采用多种数学方法进行拟合 ,建立了现代河流松散沉积物的孔隙度、渗透率与粒度中值及泥质体积分数的经验关系式 ,并分析了不同岩相、不同沉积成因单元的孔隙度、渗透率分布情况 .块状层理细砾相的平均渗透率最大 ,反向交错层理细沙相的平均孔隙度最大 .孔渗性最好的沉积成因单元为点坝 ,孔隙度分布范围为 41.87%～ 48.3 8% ,平均值为 46.71% ;渗透率分布范围为 13 .2 6～ 7113 .3 2μm2 ,平均值为 1.0 7× 10 3μm2
Based on the intensive sampling of the sediment trenches and the laboratory samples in the Damansang section of the Nenjiang River, a comprehensive interpretation of the well logging parameters in the vicinity of the trenching section is used in combination with the sample at the corresponding position of the trenching section Based on the results of particle size analysis and mathematical methods, the empirical relationships between the porosity, permeability and median grain size and the volume fraction of shale are established for the loose sediments of modern rivers. The sedimentary facies of different lithofacies, Unit porosity and permeability distribution.The average permeability of block-like fine grained phase is the largest, the average porosity of inverted-reversely stratified fine-grained facies is the largest.The best sedimentary genetic unit of pore permeability is point dam, The porosity distribution ranged from 41.87% to 48.38% with an average of 46.71%. The distribution of permeability ranged from 13.26 to 7113.32μm2 with an average value of 1.07 × 10 3μm2