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通过低演化源岩的地球化学分析和模拟实验,系统地研究了过渡带成烃机制,建立了过渡带成烃模式。提出过渡带烃类是在温度不高、压力相对小,而构造应力和粘土矿物催化作用极其活跃的条件下,可溶有机质和极性组分通过正碳离子方式脱羧、脱基团作用和富芳环不溶有机质的缩聚作用形成小分子烃类的成气机制。认为过渡带气是上述诸因素综合叠加、相互作用的结果。
Through the geochemical analysis and simulation experiments of the source rocks of low evolution, the mechanism of hydrocarbon generation in the transition zone has been systematically studied, and the hydrocarbon generation mode of the transition zone has been established. It is suggested that the transitional hydrocarbon in the transition zone is under the conditions of low temperature and relatively low pressure, while the tectonic stress and catalysis of clay minerals are extremely active. The soluble organic matter and polar components are decarboxylated by the positive carbon ion, Aromatic ring insoluble polyatomic condensation of organic matter to form a small molecule hydrocarbon gas mechanism. It is considered that the transition zone gas is the result of the combination and interaction of the above factors.