The enormous amount of natural gas generated from gas source rock of Paleozoic erathem and continuous gas supply ability is the base of the concertrated gas reservoirs.

• 上古生界气源岩巨大的排气量和持续的供气能力是古生界气藏富集的基础,天然气早期以垂向和侧向运移为主,晚期就近运移聚集,为古生界特别是上古生界大面积含气提供了有利条件。