The gas migrated from deep formation to structural high of Suining formation and formed compound gas pools of structural-lithology, and syngenetic fracture is crucial to gas production.

• 自深层运移上来的天然气至上侏罗统遂宁组储层中占高点运移和聚集，形成构造-岩性复合型次生气藏，原生裂缝的发育对产量的增加起着至关重要的作用。