Although artificial maturation of hydrocarbon source rocks by laboratory pyrolysis is far from representing natural maturation, it is a useful tool to investigate the process. In this study, we used routine open system pyrolysis for powder samples and Restricted System anhydrous Pyrolysis (RSP) for cm-sized Silurian shale source rock fragments to artificially mature the samples to different end-temperatures in the presence of a flowing carrier gas. Maturation experiments on rock fragments enable the simulation of physical barriers for the generated hydrocarbons that need to be overcome before expulsion from the source rock can occur. Based on the artificial maturation results in this study, oil expulsion efficiency from the Silurian shale source rock was 46% at the early oil generation stage and increased to 74% at approximately the peak oil generation stage.

中文翻译：

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志留系烃源岩的人工成熟：样品粒度和热解加热速率对生排油效率的影响

尽管通过实验室热解对烃源岩进行人工熟化远不能代表自然熟化，但它是研究该过程的有用工具。在这项研究中，我们对粉末样品使用常规开放系统热解，对厘米大小的志留系页岩源岩碎片使用限制系统无水热解（RSP），在流动载气存在下将样品人工熟化到不同的最终温度。岩石碎片的成熟实验能够模拟所生成的碳氢化合物在从源岩中排出之前需要克服的物理障碍。根据本研究的人工成熟结果，志留系页岩烃源岩的排油效率在早期生油阶段为46%，在生油高峰阶段左右提高到74%。