| Raoyang sag located in south-central of Jizhong Depression in Bohai Bay Basin,which is a secondary tectonic units. The thesis grasp the whole geological profiles of study area, from the aspects of the seismic data integrated interpretation, the formation and evolution characteristics of structural styles, fault activities on the control of hydrocarbon reservoirs and reservoiring structural styles forming pattern and distributing characters, analysis of the structural styles of Raoyang Sag,and compared with the hydrocarbon accumulation characteristics, get following understanding.Study area is a typical Graben basin,which is mine experienced three fault activities development periods which are Ek-Es4,Es2-Es3 and Es1-Ed, internal development a series extensional structure and slip tectonic. Extensional structure as the main, by drawing rose diagram of fault strike, obtained Paleogene fault extensional direction is Clockwise rotation,which is from near EW to NW– SE then to nearly SW; Strike slip structure also obvious from early sinistral strike-slip compression shear stress field to late dextral strike-slip shear stress field.Structural styles of study area has zonation in the plane,The main structural styles which have developed include sliding fault terrace structural style,tilted fault block structural style,graben-horst structural style,reverse drag anticline structural style,buried hill draping anticline structural style,gravity sliding graben back type structural style and negative flower shaped structural style etc.,and describes these structural styles spreading regularity of plane and profile.According to structural style evolution analysis, proposed structural styles characteristics of each period the development of evolutionary sequence in the Paleogene.Through compared with Reservoiring characteristics, describes fault activities on the control of hydrocarbon reservoirs and reservoiring structural styles combination distribution characteristics and accumulation model.
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