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济阳坳陷CO2气藏和火山活动的关系密切,表现在:1火成岩和气藏的分布具有空间上直接或间接的相关性;2火山活动可以为气藏直接提供CO2,在火成岩类型上碱性玄武岩浆活动较有利于气藏形成,在时间上馆陶期火山活动对CO2的形成较为有利,在火成岩相带上浅成侵入相、次火山岩相以及火山通道相较有利于气藏的聚集和成藏,而喷发相则较差;3侵入体对碳酸盐岩围岩的烘烤变质也可以间接提供CO2气;4火山通道中充填的火成岩可以形成有效的裂缝系统而成为气体从岩浆房上移的通道。
The close relationship between CO2 gas pool and volcanic activity in Jiyang depression is as follows: 1 The distribution of igneous rocks and gas reservoirs has spatial or direct correlation; 2 Volcanic activity can provide CO2 directly to gas reservoirs, Basaltic magmatism is more favorable to the formation of gas reservoirs. In time, the volcanic activity of Guantao period is more favorable for the formation of CO2. In the igneous facies belt, the shallow invaded facies, the subvolcanic facies and the volcanic channel are favorable for the accumulation of gas pools and And the eruption phase is poorer. 3 The invaders can also indirectly provide CO2 gas for the bake metamorphism of carbonate rocks. The volcanic rocks filled in the volcanic channel 4 can form an effective fracture system and become the gas from the magma chamber Up the channel.