Research On Stratum Characteristics Of Deep Layer In Yingtai Fault Depression

In this paper, With the guidance of sequence stratigraphy,using the method of integrated stratigraphy to conducted a systematic Research on deep stratum in Yingtai fault Depression.Through the research of sequence stratigraphy, the deep stratum is divided into one first-order sequences,three second-order sequences,five third-order sequences.Summarizing Huoshiling group,Shahezi group and Yingcheng group's lithology ,electrical ,earthquake and pollen assemblage features of deep layer in Yingtai fault depression.The top lithology of Huoshiling group is green tuffaceous sandstone ,middle lithology of it is black mudstone,the lower is gray-green tuff.The electric characteristics is high electrical resistance high SP and low GR. Seismic profile for a set of performance of strong amplitude, low, weak continuous - discontinuous reflection combination. The low lithology of Shahezi group is thick layer of green tuffaceous sandstone.The top lithology of it is thick black mudstone with thin sandstone or shale. The electric characteristics of lower is high electrical resistance and low GR,the top is in contrast.The seismic profile is characterized by a set of low amplitude,low frequency,medium continuous reflection composition.The assemblage is Osmundacidites-Protoconiferus. Yingcheng group is divided into three sections, First section is main acidic volcanic rocks, On the seismic profile is messy weak reflection, Second Section is main clastic rocks, On the Seismic profile is the strong amplitude, better continuity, parallel or sub-parallel reflection characteristics, The third section is Basic volcanic rocks, on the Seismic profile is high amplitude, high- parallel reflectance characteristics of a high continuous, Pollen assemblage is Osmundacidites-Paleoconiferus-Protoconiferus.The results of Faulted structure show that Northern is graben structure of double-break type, Central is compound faulted structure.The results of drilling and seismic data show that Huoshiling group is mainly volcanic facies, Shahezi group is fan delta facies,Clastic lacustrine facies and Coal Seam, First section in yingcheng group is fan delta facies,Clastic lacustrine facies and volcanic facies,second Section in Yingcheng is fan delta facies and clastic lacustrine facies third Section in Yingcheng is fan delta facies,Clastic lacustrine facies and volcanic facies.