Abstract: To determine the effect of tectonism on shale gas formation and preservation, the regional tectonic evolution, key periods of tectonic activities and structural styles, etc., were analyzed, and based on which a classification system of "three belts and three zones" was proposed for shale gas preservation, and the characteristics of shale gas accumulation were discussed in the Wulong area, southeastern Chongqing. The results show that the shale gas preservation was influenced by the key periods, intensity of tectonic activities and structural styles. The key periods and intensity of tectonic activities affected hydrocarbon generation, later uplifting destroyed the shale gas preservation conditions, but appropriate uplifting is favorable for shale gas development. The influence of structural styles on the formation and preservation of shale gas is the jointing result of multiple factors, so that simple structural classification can't reflect the shale gas preservation conditions, and the preservation conditions in any tectonic style can be divided into "three belts ad three zones", under which the differences of the preservation conditions in different regions could be comprehensively compared. It is found transitional zone and internal unicom zone are favorable for shale gas development. The eastern flank of the Wulong area is an open slope where the transitional zone and internal unicom zone are small, so the beneficial exploration target should be around the structure center. The western flank of the Wulong area is a continuous slope with fine preservation conditions, where the transitional zone and internal unicom zone are larger, so shallow layers are suitable for shale gas exploration.

Key words: shale gas, tectonic movement, preservation conditions, Wulong area