1. Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu City,Sichuan Province,610059,China;
2. State Key Lab of Reservoir Geology and Development Engineering,Chengdu University of Technology,Chengdu City,Sichuan Province,610059,China;
3. Research Institute of Exploration and Development,Tuha Oil field Branch Company Ltd.of Petrochina,Hami City,Xinjiang Autonomous Region,839009,China
Abstract：Based on study on the seismic data from deep strata,drilling data and outcrops etc.in Turpan Depression,the paper established the regional geological section for the complicated structure belt and carried out the structural recovery by using the balanced section technique.The main purpose of which is to reconstruct the forming process of the structure dynamically,judge the distribution of traps accurately and explain the relationship between the migration,accumulation and destruction of the hydrocarbon and the structure evolution reasonably.It is understood that the Hercynian to early Indosinian period is the embryonic stage for the depression formation,the deformation intensity decreasing from the South to North.The late Indosinian to Yanshanian period is the stage of uplift development deformation with the feature of structure's distortion earlier in the south than in the north and the distortion intensity decreased from the south to the north.The Himalayan period is adjusting and modifying stage for the deep paleo tectonic,featured the intensity of the adjusting and modifying decreasing from north to south in NS direction and stronger in the middle and weaker in the east section and west section in the EW direction.The tectonic movement and trap formation is characterized by mainly the uplift and erosion in Late Indosinian period,the successive fold strengthening in Mid-late Yanshanian period,and the thrust fold modifying in Himalayan period.The relationships between the formation of trap and the migration of hydrocarbon are as follows:(1) the traps formed in Hercynian to early Indosinian period were earlier than the main stage of the hydrocarbon's generation and expulsion,(2) the traps formed in late Indosinian to middle Yanshanian Movement stage were almost at same time with the main stage of hydrocarbon's generation and expulsion,(3) the traps formed in late Yanshanian movement to early Himalayan movement stage were litter bit late than the main stage of hydrocarbon's generation and expulsion and(4) the traps formed in Late Himalayan period were much later than the main stages of hydrocarbon generation and expulsion.
