There is widespread coal seam of Permo-Carboniferous in Jiyang Depression.The coal has good quality, moderate evolution degree resulted in the foundation of forming medium coal-derived gas reservoir.

• 济阳坳陷石炭-二叠系煤层分布广泛,煤质优良,演化程度适中,具有形成中型煤成气藏的基础。