The Regularity And Formation Mechanism Of Fault Development In Jiangjiadian Region Of Huimin Depression

Jiangjiadian area,located in the south of Huimin Sag,is a nose shaped structure controlled mainly by the Xia Kou fracture.The paper mainly explains the seismic profile of Jiangjia area,summarizes the law and formation mechanism of fault development,and verifies the formation process and influencing factors through the structural physical simulation experiment and the restoration of tectonic evolution section,and then draws the control effect of the fault on the oil and gas accumulation in Jiangjia store area.Under the influence of Xiakou fault and tectonic fault Ying Zi Jie,Jiangjiadian area of fracture in the plane structural styles are: parallel,echelon,oblique type;profile style are: ladder type,Horst type,"Y" type.The large fault interpretation in Jiangjiadian area is relatively detailed,and the degree of research is relatively high,but the study of small faults is relatively small.Several typical small fault identification methods and symbols are summarized in this paper: minor misalignment of the phase axis;slight deflection of the in-phase shaft;bifurcation and merging of the phase axis;occurrence of empty leucorrhea in the phase axis;and discontinuity of the phase axis;with ant body profile.By using the balanced section principle of tectonic evolution restoration,Xiakou fault formed in Kongdian Formation and Sha-4 Zone;during the deposition of the Sha-3 Zone Xiakou fracture began violent activities of the real,affected by this,Jiangjiadian area produces a large number of associated small fault;Sha-2 Zone,sand Sha-1 Zone sedimentary period,summer port fault activity began to weaken,the number of associated fault than before has been significantly reduced;Dongying group to Minghuazhen sedimentary period,Jiangjiadian area has a small amount of small faults.Through a large number of seismic profile interpretation and literature research,the main mechanism of small fault formation in Jiangjia area is summarized.: around the fault associated;fault end formation;intrusive internal and peripheral fault formation;bifurcation in profile;large faults extending over the direction of the formation.The formation mechanism of small faults in Jiangjia area is also verified by the structural physical simulation experiment.By Sha-3 Zone sand Sha-4 Zone section fault controlled reservoir profile analysis,shop area for oil and gas migration patterns in Jiangjiadian are: "One" type,"multi" type,"Z" type,transmission mode;the fault configuration of main types: fault fault type,fault and sand body.The sand body,fault type,fault,unconformity type,unconformity fault type.Finally,combined with the specific fault structure characteristics,the favorable region of the oil and gas in Jiangjiadian area is predicted.