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渤海湾盆地黄骅坳陷歧口凹陷西南缘沙一段下部为封闭—半封闭的湖湾相沉积环境,在沙一段下部的板2油组—板4油组沉积了一套白云岩储层。通过对该套储层系统地取心归位和描述,进一步明确了白云岩储层的分布特征。根据白云岩储层电性特征并结合分析化验资料,开展了岩性识别,建立了白云岩储层和油层电性识别图版;在此基础上利用铸体薄片鉴定及FMI成像测井资料分析了白云岩储层的孔隙类型,应用岩心物性分析、核磁共振、双侧向测井等资料探讨了裂缝、基质有效孔隙度和含油饱和度的计算。
In the lower part of the first member of the First Member of Shahejie Formation in the southwestern margin of the Qikou Sag, Bohai Bay Basin, Huanghua Depression is a closed-semi-closed lake-bed depositional environment. By systematically locating and describing the set of reservoirs, the distribution characteristics of dolomite reservoirs are further clarified. Based on the electrical characteristics of dolomite reservoirs and analysis of laboratory data, lithology identification was carried out and dolomite reservoir and reservoir identification plates were established. On the basis of the identification of the thin sections and the FMI imaging logging data The pore types of dolomite reservoirs are discussed. The fractures, matrix porosity and oil saturation are calculated by using core physical property analysis, NMR and double lateral logging data.