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对金湖凹陷阜宁组二段的岩石成分、岩石物性、成岩作用、孔隙结构、粘土矿物的潜在敏感性等特征进行了研究，揭示了储层的微观非均质性。研究表明，储层的成岩特点以泥质和碳酸盐胶结作用为主，成岩阶段为早成岩期Ｂ亚期向晚成岩Ａ亚期过渡。储层孔隙类型以原生粒间孔为主，孔隙结构以小孔细喉结构为主，储层微观非均质性强。
The characteristics of rock composition, petrophysics, diagenesis, pore structure and potential sensitivity of clay minerals in the second member of Funing Formation in Jinhu Sag have been studied, revealing the micro-heterogeneity of the reservoir. The study shows that the diagenesis of the reservoir is dominated by the combination of mudstone and carbonate cementation. The diagenetic stage is the transition from the B stage to the late stage diagenetic stage A in the early diagenetic stage. The pore types of the reservoirs are dominated by primary intergranular pores, the pore structure is dominated by small pore throat structure, and the reservoir micro-heterogeneity is strong.