Research On Structure Characteristics And The Distribution Of Oil And Gas In Binnan Oil Field

Based on the data of geology,well-logging and seismic and so on,this paper makes a three-dimensional seismic interpretation of Binnan Oilfield in Dongying Depression.On the base of the analysis of the development of Binnan fault,this paper focuses on the geometry of internal secondary faults and kinematic characteristics,define the genesis mechanism of structural faults and the tectonic development model in the study area,analysis the differences of the faults in the study area are analyzed.Combining the depositing evolution and the distribution of oil and gas,it finally analyzed the effects of faults and sedimentary characteristics to oil and gas.Deep seismic data and other diversified data show that the Binnan fault is an important fault in the Dongying sag.It develops in the linear bending overall,the west part strike to NW,the middle part strike to EW,and the east part strike to NE.It is divided into Yanshan movement and Himalayan movement evolution stage.During the Himalayan stage,it occurs regional tectonic movement,including Jiyang movement and Dongying movement.On the basis of the stratigraphic division,it discussed the structural features of this area through fine seismic interpretation.There are main four faults in the Bin-Kuang area-F1 fault,F2fault,F3 fault and F4 fault.The planar combined types of fault in key area are parallel,oblique,and grid-type.The section combined types of fault are ladder-like,broom-like,graben and cauda equine and so on.The results show that the F1 fault,the F3 fault and the F4 fault are active in the E_k,and in the Es_4-3 period reaches the peak,and then gradually decreases,and the small activity of Es₁ is enhanced lightly again.Then it gradually weakened,to Ng-Nm period stop.F2 fault effected by the F1 and F3 fault interaction,the activities of the time later than the F1 and F3,mainly formed in the Es₃ period.The activity of the fault shows the characteristics as a whole presents a weak-strong-weak cycle,According to the study of the plane and longitudinal distribution of oil and gas in the study area,it discussed the effect of oil and gas by fault and sedimentation,finally analyzed the important factors of oil and gas distribution in the whole area.