Research On Strike-slip Structure And Distribution Rule Of Oil And Gas In Jiyang Depression

Strike-slip fault is one of the most important structures in the development of Jiyang depression.Predecessors of strike-slip fault of a large number of research,mainly concentrated in the distribution,tectonic style,fault evolution and formation mechanism,but the system of research of Jiyang depression go sliding structure and strike-slip and pull-apart structure and distribution of oil and gas concentration in Dongying and Zhanhua Sag for less.This thesis in Jiyang depression depression each sag in the development of strike slip faults,for example,through on the seismic profile,sedimentary facies,tectonic buried deep data comprehensive analysis,comprehensively discusses the strike slip tectonic characteristics,strike slip extensional tectonic features and control the distribution of oil and gas.The research results show that:due to the development of multi stage structure and multiple faults in Jiyang depression,a large number of different types and sizes of transformation structures have been developed in the Cenozoic era.Controlled by the development of plate,the deep fault,the deep geodynamic background factors and control effect in different periods and different direction of superposition,resulting in Jiyang depression depression occurred many times of tectonic inversion,resulting in sedimentary basin framework and tectonic evolution characteristics and hydrocarbon accumulation conditions change.There are 2 major types,4small classes and 9 kinds of concrete manifestations in the inversion structure of Jiyang depression.The main evolution stage of the Jiyang depression is the three phase of the sand-Dongying period.It is of vital importance to the present tectonic framework and hydrocarbon accumulation in Jiyang depression.Jiyang depression,strike slip structure mainly includes the regional strike slip tectonic and strike slip tectonics,regional strike slip structure includes:Tanlu fault zone,Lanliao fracture belt,Luxi brush structure,Jilu brush structure such as,regional strike slip tectonic analysis can show the,Jiyang depression in Mesozoic and Cenozoic in the regional strike slip stress environment;area go slip structure can be divided into basement strike slip faults and the cover layer strike slip tectonics.Weibei sag,Laizhou Bay sag,Qingdong sag,Zhuangdong sag is a kind of strike slip pull apart basin,strike slip pull effect of sag in the oil and gas distribution has an important role.In the Jiyang depression,the oil and gas enrichment in Dongying sag,Zhanhua sag,mainly concentrated around a main oil generating sag Es₃-Ed is developed,mainly concentrated in Paleogene Dongying Formation and Neogene Guantao formation,mainly concentrated in the construction of oil and gas reservoirs are mainly enriched in the two tectonic zone,nappe tectonic belt in the Paleogene tectonic belt and Neogene buried hill drape;mainly enriched in two kinds of complex oil gas accumulation zone:the Paleogene tectonic belt is the subject of multiple oi l and gas accumulation belt,in buried hill drape nappe structure belt is the subject of multiple oil and gas accumulation zone.Caused by tectonic activity in sag,sag of the generation,development and disappearance,the basic influence factors of tectonic activity includes four basic aspects:one is the regional dextral strike slip stress field;things depression boundary fault?zone?characteristics and strike slip movement;third depression basement faults of strike slip movement;the fourth is depression within the Paleogene strata of the mechanical properties.