Analysis Of Deformation Characteristics Of The Northern Piedmont Belt In The Turpan-Hami Basin

The Turpan-Hami Basin is rich in natural gas and natural resources.Previous studies have done extensive research on sedimentary structures and hydrocarbons in the Taibei Depression area where the resources in the basin are most concentrated.However,there are still many controversies and blind spots in the exploration practice of specific structures.In order to provide guidance and guidance for the tectonic studies and oil and gas exploration of the pre-Taipei block in the vicinity of Bogda Mountain in this area,this paper is based on the new seismic data,through the detailed interpretation of seismic profiles and the restoration of balanced sections.The fault features,tectonic styles,and tectonic evolution of the area have been re-evaluated and recognized.Through the detailed interpretation of the new seismic data,four large section structural lithology maps were obtained,and the structural patterns of the area were re-examined.It was proposed that there were six from the thrust overturning front belt to the transitional belt to the trailing edge belt in this area.The structural styles are:(fractured)anticline,snakehead structure,protruding structure,shingle fan structure,pushover monoclinic belt,and overlapped tile double structure.Based on the analysis of the plane distribution of seismic data,the distribution map of the structural styles is obtained,and the structure of the piedmont zone has the structural characteristics of “South-North Belt,East-West Segmentation”.The North-South Belt is the front belt of the pre-transverse rapt tectonic belt and The fault fold zone consists of two parts.The east-west segmentation is based on the Yanshanian tectonic setting and sub-hydrocarbon system.The fault-folded zone can be divided into the west,middle,and east segments,and the tectonic background is obviously different.The evolution period is divided into four phases: the Hercynian Movement(late Paleozoic),the Indosinian Movement(Late Permian to Triassic),the Yanshan Movement(Jurassic,Cretaceous),and the Himalayan Movement(since the Cenozoic),Among them,the most important ones are the Late Yanshanian and Himalayan movements,the former affecting the piedmont zone and the latter causing full deformation(primary period).From the viewpoint of oil and gas accumulation,the tectonic movement in the piedmont zone is of great significance to the formation and migration of multi-grade reservoirs: the combination of source rocks and multi-period tectonic movements in the area,forming a multi-period hydrocarbon accumulation;fault control The development of local structures,inherited structures,multi-phase active oil source fractures and good sealing conditions control the distribution and enrichment of oil and gas;the combination of tectonic patterns and sedimentary sand bodies controls the separation of multiple independent transport and accumulation units.Flat distribution of oil and gas.