埕岛油田是我国极浅海地区第一个投入开发的大油田,其馆陶组上段属河流相砂泥岩沉积,油气富集程度高。该层段分为五套砂组,其中三砂组和四砂组是主要的含油储层。此次研究的目标工区内主要的烃类是重质油,含油储层与含水储层的物性差异较小,通过反演常规的弹性参数无法准确指示油气。基于测井曲线和岩石物理交汇分析,本文构建了敏感的油气指示因子,通过扩展的弹性阻抗反演技术反演该指示因子从而进行油气展布预测。该方法在工区得到了良好的应用效果。 Chengdao Oilfield is the first large oilfield in our country with extremely shallow sea area. The upper part of Guantao Formation is a sedimentary facies of fluvial sandstone with high degree of hydrocarbon enrichment. The interval is divided into five sets of sand group, of which the sand group and sand group is the main oil reservoir. The main target hydrocarbon in the study area is heavy oil. The difference between physical properties of oil-bearing reservoirs and aquifer reservoirs is small, and oil and gas can not be accurately inspected by inverting conventional elastic parameters. Based on the analysis of well logging and petrophysics, this paper constructs a sensitive oil and gas indicator, which can be used to predict the oil and gas distribution by extending the elastic impedance inversion technique. The method has been applied in the work area.