2011•Journal of Jilin UniversityRequires access
High Resolution Sequence Framework and Sedimentary System Analysis of Dongying Formation in Nanpu Depression
Yanpeng Chen
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Abstract
Based on comprehensive analysis of high resolution 3D seismic,well and lots of geological data and characteristics of sequences boundaries,Dongying Formation could be divided into 1 first-order sequence,2 second-order sequences and 4 third-order sequences.Then sequence composition is analyzed and the system tracts are identified,finally the regional third-order sequence model is established.According to sequence framework analysis,we find that master control factors are tectonism,provenance and lacustrine water level change.Sequence stratigraphic and geological setting analysis indicates that sedimentary facies of Liunan sag include five types: alluvial fan,fan delta,subaqueous fan,gravity flow,and lake system.Alluvial fan and subaqueous fan develop in LST,fan delta and gravity flow develop in HST,and lake system develop in EST.