The Study Of Seismic Sedimentology Of Paleogene In Qing-Nan Sag, Dongying Depression

Qing-Nan sag is located in the saddle between Jiyang depression and Qingdong depression.It is secondary depressions of Jiyang Dongying depression which connected Qing tuozi salient in north part and gentle slope transitional to Guangrao salient in south part.The exploration area is 300 km2. During the study on Qing-nan sag the sparseness of wells has become the bottleneck of the resesrch.How to make best use of the horizontal continuity and the various information of seismic and the well logging sedimentology,stratigraphy and development geolgy with the high vertical resolution of data ,make sedimentary context research under the geogly regular pattern directing ,is the main point to the future work.Aiming at these problems,two key aspects are researched with thought of research..Firstly,making detailed short of seismic sedmentology.Proposed a new seismic sedmentology searching plan after generalizing all examples in this territory.Then attaching importance to boost the concept during actual application ,making best presenting another course in seismic sedmentology which suitable for continental sedimentary.Through hard working four conclusions were generated :(1)Qing-nan sag Paleogene can be diviseed one first-order sequence,four second-order sequence and eleven third-order sequence;(2)Based on analysising single well sedimentary facies and multiwells sedimtntary facies plotted all layer sections'sedimentary facies,used seismic facies,90 degree phase concert,strata slice,seismic attribute and so on,then generalized sedimentary model in Qing-nan sag.(3)Depending on types of sedimentary facies and sedimentary system's features in longitudinal distribution and reseach area seismic attributes'abnormal area distribution ,it can be clear realized in steep-slope zone in north,gently-slope zone in south and nose structure zone in East GuangLi had good hydrocarbon show.