Analysis Of The Structural Styles In Hailaer Basin

For the complicated structural styles of Hailaer basin,this paper made full use of 2-d and 3-d seismic data,and adapt the method of inertia associating with activity and the local associating with the whole,and systematically studied the geometry and kinetic characteristics of the structures in the basin,and then analysed the structural styles of the basin. Study of the geometry characteristics of tectonic style, type, distribution and formation mechanism, is the prototype basin restoration of basin formation mechanism and evolution characteristics of the important basis. Based on the analysis above, the relationship of the tectonics with oil and gas was investigated.Through the research of the knowledge, draws the following:1. The fractures in the basin are of various types and commplex genesis: According to their genesis and control action to structures, sediments and traps,they can be divided into four levels; on the basis of their genesis, they can be classed into the basement fault systems, extensional fault systems, wrench fault systems, inversion fault systems.On the plane and profile, they can be combined into a variety of combination type;Their development period are two curtain and four periods.2. The structural styles in the basin can be classced into the extensional structural styles, the strike-slip structural styles, the adjusting structures and the inversion-period structural styles.The transfer faults as a major type among the adjusting structures.The inversion-period structures can be divided into the neo-structures and the stacking structures, and the listric thrust fault and snake head structure were identified for the first time.3.Fractures controled the space distribution of the source, reservoir and caprock,andcontroled the formation, types and distribution of traps. The adjustment and inversion tectonic belts are favorable hydrocarbon accumulation zones.Multiple unconformity,formed by polycyclic evolution of the basin, played an important role to the migration and accumulation of oil and gas.