【摘要】 以层序地层学理论为指导,通过层序地层的划分与对比,将营城组地层划分为4个沉积层序和一个火山岩夹层。根据取芯资料、测井资料,并结合古生物、岩石薄片、粒度等综合分析的结果,将营城组地层发育的沉积相类型分为扇三角洲相和湖泊相。利用地震反演手段预测了砂体的平面分布,用波形分类技术进行了地震相分析,结合单井沉积微相的划分结果,综合预测了营城组沉积相平面分布特征,分析了其在平面上的变化规律。东岭地区营城组沉积时期,为一个完整的超层序发育过程,沉积相总体上呈近东西向展布,北东向相带变化明显的特点,物源充足,来自北东向。总体上构成一个向上变粗的进积序列,反映了湖平面从扩张到收缩的沉积特征。更多还原

【Abstract】 Based on the sequence stratigraphy theory,this paper subdivided the Yingcheng Formation into four sedimentary sequences and one volcanic intercalation by means of sequence stratigraphic classification and comparison.According to the analysis of coring data,logging data,palaeontological characteristics,rock slices and grain sizes,the sedimentary facies in Yingcheng Formation should include fan-delta subfacies and lakes subfacies.On plane,the authors used seismic inversion tools to predict the distribution of sand and employed seismic waveform classification technology to do seismic face analysis.With the division results of the microfacies in individual wells,a comprehensive forecast was made for sedimentary facies distribution in Yingcheng Formation,and the evolution regularity on plane was analyzed.During the deposition of the Yingcheng Formation,there was a complete sequence development process in Dongling area.The sedimentary facies assumes an overall EW-striking spreading,with obvious variations in the NE direction.Material source from the northeast was adequate,and the sedimentary facies on the whole formed an integral sequence sedimentary sequence,reflecting the sedimentary characteristics of the lacustrine plane from expansion to shrinkage.更多还原