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以岩心描述为基础,综合各种分析化验资料,对珠江口盆地NH25油藏岩石学特征、岩石相特征、生物遗迹化石等方面开展深入研究。结果表明储层成分成熟度较高,结构成熟度中等,发育6种岩石相,海生迹遗迹化石丰富、分布广泛,成岩作用较弱,对物性影响不大。综合确定研究区属滨岸相临滨亚相沉积,进一步分为上临滨、中临滨、下临滨,利用孔隙度和渗透率对沉积微相进行定量识别。沉积微相与油藏开发关系表明:上临滨产能高于中临滨,中临滨产能高于下临滨产能,下临滨和中临滨及不同沉积微相过渡区是剩余油富集区。
Based on the core description, a comprehensive study of various analytical laboratory data is carried out to conduct an in-depth study on the petrological characteristics, lithofacies characteristics and biological trace fossils of the NH25 reservoir in the Pearl River Mouth Basin. The results show that the reservoir has high maturity, medium maturity and six kinds of rock facies. The marine trace has abundant fossils, widely distributed, diagenesis and little influence on physical properties. It is determined that the study area belongs to the sedimentary facies of Binhai shore and is further divided into Upper Linbin, Zhonglinbin and Lower Linbin, and the sedimentary microfacies are quantitatively identified by using the porosity and permeability. The relationship between sedimentary microfacies and reservoir development shows that the productivity of Upper Linbin is higher than that of Zhonglin Bin, the middle Linban productivity is higher than that of Lower Linban, the lower Linbin and Zhongbanbin and the different sedimentary facies are the remaining oil enrichment Area.