The types, characteristics, ages and parameters of the microfractures in T3x2 of Qiongxi structure are studied through microscopic thin section analysis and in combination with core and outcrop data.

Natural gases of the T3x2 reservoir in Qiongxi structure have the same or similar geochemical characteristics because of the same source,but due to different time of gas accumulation,some subtle geochemical differences in the hydrocarbon fingerprint characteristics can still be detected.

The West Sichuan Depression developed along the eastern margin of Longmenshan structural zone,lying between the Longmen Mountain and the Longquan Mountain,in which Qiongxi structure is formed and extended from north to south with its long axis paralleling to the Longmen Mountain.

In recent years, with the exploration technology rapid development, we have obtained significant breakthrough at Changyuanba Structure Zone Jialingjiang Formation, proved that the Jialingjiang Formation still had big exploration potential, at the same time, the phenomenon of produced the gas and the water simultaneously is commonly.

The evolution of the Kongxi structural belt can be mainly divided into three periods by using the balanced profile technique to restore paleostructure during the Middle Late Triassic.