Research on the Sequence Stratigraphy of Eogene in Raoyang Depression

The research of sequence stratigraphy of Eogene has been based on comprehensive study of seismic data,well logging data,lithologic data and the evolvement process of tectonic movement in raoyang depression.The strata of Eogene are divided into three second-order sequences and ten third-order sequences.The third-order sequenceⅢ,Ⅳ,Ⅴ and Ⅶ are lacustrine sequence and Ⅰ,Ⅱ,Ⅵ is climate sequence,which can be divided into the low stand system tract,the lacustrine transgressive system tract and the high stand system tract.The third-order sequence Ⅷ,Ⅸ,Ⅹare fluvial sequence,which can be divided into the base-level-rising system tract and the base-level-falling system tract.On the basis of the different identification of different evolvement process and tectonic site,sequence stratigraphy models are established and divided into 6 types.The future exploration direction of raoyang depression is proposed according to the analysis of the hydrocarbon bearing in different tectonic site.