The Permian coalbed methane(CBM) reservoir with mixed secondary biogenic and thermogenic gas in the Huainan Coalfield, Anhui Province, is affected by complex geological and hydrogeological factors.

• 淮南煤田由次生生物成因和热成因气组成的混合型煤层气藏,受各种地质和水文地质条件的影响和控制。