根据威远震旦系气藏天然气组成、同位素特征、储层包裹体的对比研究 ,我们认为该气藏的天然气主要来源于下寒武统筇竹寺组泥岩 ,其天然气主要是干酪根裂解气 ,次为油的裂解气。威远震旦系气藏是喜山期形成的 ,威远的天然气无论是干酪根裂解气还是油裂解气都由北面古构造聚集的干酪根裂解气和油裂解气转移而来 ,威远构造之所以能形成工业聚集的重要原因就是威远构造的形成与北面古构造的消失的良好匹配关系 According to the comparisons of natural gas composition, isotopic characteristics and reservoir inclusions of the Sinian gas reservoirs in Weiyuan, we believe that the natural gas in this gas reservoir is mainly derived from mudstone of the Lower Cambrian Qiongzhusi Formation, and the natural gas is mainly kerogen pyrolysis gas , Second for the cracked gas oil. The Weiyuan Sinian gas pool was formed during the Himalayan period. The Weiyuan gas was transferred from the kerogen pyrolysis gas and oil cracked gas that gathered in the north paleo-structure both from the kerogen pyrolysis gas and the oil cracking gas. The Weiyuan structure The reason why the formation of industrial agglomeration is an important reason for the formation of Weiyuan tectonic formation and disappearance of the North paleontology