Characteristics And Causes Of Akekule Protruding Structural Traps

The breakthrough for oil-gas exploration has been found in Ordovician , Devonian System , Carboniferous and TRias of Akekule horse back, and the work area has predominant conditions for becoming the huge-middle oil field. Except for huge carbonate rock lithologic deposit of Ordovician, the main hydrocarbon reservoir are all belong to tectonic hydrocarbon reservoir. With deep and extended bound of exploration, and with the hope for the further cognition for the congruence duplex hydrocarbon reservoir's rules of forming the hydrocarbon reservoir in Tahe, it is very significant to make further research on tectonic trap. The text has made analysis of tectonic trap's feature and its geneses.Giving the priority of tectonic research and at the base of planar and 3D seismic materials, making the features of fault and trap as the main body, combining with the drill fruit of Akekule area in those years, the text made research in following aspects:features of development , rules of distribution, mechanism of geneses , evolution of tectonic traps. At the same time, with the analysis of main tectonic hydrocarbon reservoir 's petroleum conditions, the text maed discussion on the main factor of tectonic trap and predicted the favorable belt and traps in work area.The result shows that: The several tectonic movements of work area has profound impaction on the formation , distribution and evolution of tectonic traps. The traps of work area has laminarity, the fault block burial hill traps has developed in Ordovician, the tectonic lithologic compound traps in Carboniferous, anticline , anticlinal traps in Triassic, especially the anticlinal traps overlaps in several layers making for the discovery of the huge hydrocarbon reservoir. Resembling with local tectonic belts, the patterns of tectonic traps has regionalization. The main genesis of tectonic traps here are squeezing tractive effort, fault block effort, the saline the plastic flow. According to the research and the parallel prediction of favorable petroleum belts, it is clear that the saline side tectonic belt of Trias in Tahe is the favorable oil gas tectonic belts.