科研之友
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摘要
In the Songliao Basin, Cretaceous Yingcheng volcanic rock is an important natural gas reservoir. Volcanic rocks and source rocks interspersed in the fault depressions represent ideal places for studying the interactions between volcanic fluids and source rock. Thermal simulations for this study include the dry system and the fluid system. The characteristics of the gas yield and gas composition were analyzed under four temperature gradients: 300 degrees C, 350 degrees C, 400 degrees C, and 450 degrees C. The results of the experiment showed that in both systems, the gas yield increases with an increase in temperature. The gas compositions are similar, containing H-2, CO, CO2, and gaseous C-1-C-5 hydrocarbons. Compared with the dry system, the gas yield of the volcanic fluid to mudstone system has a critical temperature between 350 degrees C and 450 degrees C. When the temperature is below the critical temperature, the gas yield increases, and vice versa. The generation of CO2 is promoted by the volcanic fluids, but the generation of H-2 and C-1-C-5 series gaseous hydrocarbons is simultaneously restrained. In the fluid system, the content of H-2 and gaseous C-1-C-5 hydrocarbons is lower, but CO2 content is greater than in the dry system. This can explain the fact that a huge amount of CO2 gas is present as a reservoir in the Songliao Basin.
- 出版日期2013-9-17
- 单位吉林大学
