Primary discussion on relationship between hydrocarbon preservation and tectonic movement—a case study in upper Yangtze region

The previous studies of the relationship between tectonic movement and hydrocarbon preservation mainly focused on the destructive functions of tectonic movement rather than the constructive functions.Taking the upper Yangtze region as an example,it was discussed in this paper the influence of tectonic movement on hydrocarbon preservation from both destructive and constructive aspects.The dynamic transformation from one function to another was also studied.In space distribution,from oroge-nic belts to detachment belts,hydrocarbon preservation conditions were improved.As to detachment belts,preservation conditions of the infrastructures were better than those of the superstructures.In the regions which had experienced stages of tectonic movements,the main faults forming traps might change from filling faults to escaping faults,and vice versa.