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油气藏油气充注幕次和成藏年龄确定一直是成藏过程研究的热点和核心问题.通过60块流体包裹体系统分析,结合单井埋藏史投影方法,分析了三塘湖盆地火山岩油气藏的油气充注幕次和成藏期次,确定了其成藏年龄,从而对其油气成藏过程进行了研究,认为三塘湖盆地火山岩油气藏经历了石炭纪以来三期油气运聚的成藏过程.它们分别发生在259～230Ma、160～134Ma和70～0Ma,其中早期(海西印支期)油气成藏对盆地深部油气勘探具有重要意义.
It has been a hot and central issue in hydrocarbon accumulation research that the succession and accumulation age of hydrocarbon accumulation in oil and gas reservoirs have always been the focus of the study.According to the analysis of 60 fluid inclusions and the single-well burial history projection method, the volcanic reservoir in Santanghu Basin The period of oil and gas charge and the period of hydrocarbon accumulation are set, and the hydrocarbon accumulation age is determined. The process of hydrocarbon accumulation is studied. It is concluded that the volcanic reservoirs in the Santanghu Basin experienced three stages of hydrocarbon migration and accumulation since the Carboniferous They occurred in 259 ~ 230Ma, 160 ~ 134Ma and 70 ~ 0Ma, respectively, of which the early (Hercynian-Indosinian) hydrocarbon accumulation is of great significance to the deep oil and gas exploration in the basin.