矿物质对干酪根热解生烃过程的影响

利用热模拟实验 ,从热解生烃组成特征、生烃量、生烃动力学等方面探讨了矿物质对东营凹陷烃源岩干酪根热解生烃过程的影响。结果表明 ,矿物质改变了干酪根热解产物的组成 ,提高了干酪根热解总生烃量。低生烃率时 ,矿物质使干酪根热解过程的视频率因子增加 ;高生烃率时 ,矿物质使干酪根热解过程的表观活化能降低 ,活化能分布范围变窄 ,反应速度加快。矿物质对干酪根热解生烃过程的催化作用可借助于正碳离子反应机理进行解释。

Catlaytic effects of minerals on hydrocarbon generation in kerogen degradation

The effects of minerals on hydrocarbon generation from kerogen of source rock are investigated with simulation experiment and chemical catalysis. The simulated samples are selected from Dongying depression in China. The product composition, hydrocarbon yield, and hydrocarbon generation kinetics are studied. The minerals have different effects on hydrocarbon generation in kerogen degradation. The presence of minerals can change the product composition and increase the product yield. When the hydrocarbon yield is low, the frequency factor increased in the process of hydrocarbon generation. For a high hydrocarbon yield, the minerals can cause the apparent activation energy decrease and reduction of the distribution scale and quickening the reaction rate, and raising the hydrocarbon yield. The catalytic mechanism of minerals can be tentatively interpreted with the carbonium ion mechanism.