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靖边老庄油田侏罗系延安组延9段储层岩石类型主要为岩屑质石英砂岩,结构成熟度中等、成分成熟度较低,属典型低孔低渗储层。利用岩心、铸体薄片、物性分析及常规压汞等资料,分析延9储层特征,指出影响油气富集规律的主控因素为沉积环境和差异压实成因的鼻隆构造。沉积环境是沉积相对砂体类型及其孔渗性特征的控制,不同沉积微相的砂体有不同的物性特征和分布规律,进而控制油气的聚集和分布。而差异压实作用形成的小幅度鼻隆是形成延9油层的最主要的因素,研究区延9油藏均分布在局部构造的高点部位。
The Jurassic Yanjing Formation Member 9 of Yanzhu Formation in Laobin-Zhuang Oilfield of Jingbian is mainly lithic quartzite sandstone with medium maturity and low maturity. It is a typical low-porosity and low-permeability reservoir. The characteristics of Yan 9 reservoir are analyzed by using core, thin cast film, physical property analysis and conventional mercury intrusion. The main controlling factors affecting the enrichment rule of oil and gas are the depositional environment and the nasal-long structure of differential compaction. Sedimentary environment is controlled by sedimentary relative sand body type and its porosity and permeability characteristics. Different sedimentary microfacies sand bodies have different physical characteristics and distribution rules, and then control the accumulation and distribution of oil and gas. However, the formation of small differences in the role of compaction Nalong Long Yan 9 reservoir formation is the most important factor in the study area Yan 9 reservoirs are located in the local structure of the high point.