Three sets of hydrocabon source rocks in the Neogene,Oligocene and Eocene,in which the gas was mainly generated,are of important significance for natural gas accumulation because of their deep burial and high maturity.

• 有以生气为主的3套上第三系烃源岩，渐新统和始新统烃源岩因深埋、高成熟而对天然气聚集有着重要意义。