The carbon dioxide gas in Huanghua depression features in more reserving layers, high abundance, multi-genetic types, highly pure reservoirs located in a small areas, and small gas reservoir.

• 黄骅坳陷二氧化碳气的特征是:层位分布较普遍、丰度和成因类型较多、高纯度气藏分布地域较集中和气藏规模较小。