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首页> 外文期刊>Chinese Journal of Geochemistry >Thermogravimetry-differential thermal analysis coupled with chromatography as a thermal simulation experimental method and its application to gaseous hydrocarbons from different source rocks
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Thermogravimetry-differential thermal analysis coupled with chromatography as a thermal simulation experimental method and its application to gaseous hydrocarbons from different source rocks

机译：热重分析-差示热分析结合色谱法作为热模拟实验方法及其在不同烃源岩气态烃中的应用

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摘要

In this paper a thermogravimetry-differential thermal analysis method coupled with chromatography (TG-DTA-GC) has been adopted to simulate the generation of gaseous hydrocarbons from different hydrocarbon source rocks such as coals, mudstones, and carbonate rocks with different maturities. The temperature programming for thermal simulation experiment is 20℃/min from ambient temperature to 700℃. As viewed from the quantities and composition of generated gaseous hydrocarbons at different temperatures , it is shown that low-mature coal has experienced the strongest exothermic reaction and the highest loss of weight in which the first exothermic peak is relatively low. Low-mature coal samples have stronger capability of generating gaseous hydrocarbons than high-mature samples. The amounts and composition of gaseous hydrocarbons generated are closely related not only to the abundance of organic carbon in source rocks, but also to the type of kerogen in the source rocks, and their thermal maturity. In the present highly mature and over-mature rock samples organic carbon, probably, has already been exhausted, so the production of gaseous hydrocarbons in large amounts is impossible. The contents of heavy components in gaseous hydrocarbons from the source rocks containing type-Ⅰ and-Ⅱ kerogens are generally high; those of light components such as methane and ethane in gaseous hydrocarbons from the source rocks with Ⅲ -type kerogens are high as well. In the course of thermal simulation of carbonate rock samples, large a-mounts of gaseous hydrocarbons were produced in a high temperature range.
机译：本文采用热重-差示热分析与色谱法（TG-DTA-GC）相结合，模拟了不同烃源岩如煤，泥岩和不同成熟度的碳酸盐岩中气态烃的生成。从室温到700℃，热模拟实验的温度编程为20℃/ min。从在不同温度下产生的气态烃的数量和组成来看，表明低熟煤经历了最强的放热反应和最大的失重，其中第一个放热峰相对较低。与高成熟度样品相比，低成熟度煤样品具有更强的生成气态烃的能力。产生的气态烃的数量和组成不仅与烃源岩中有机碳的含量密切相关，而且与烃源岩中干酪根的类型及其热成熟度密切相关。在目前高度成熟和过成熟的岩石样品中，有机碳可能已经耗尽，因此不可能大量生产气态烃。来自含Ⅰ型和Ⅱ型干酪根的烃源岩中的气态烃中重组分的含量普遍较高。含Ⅲ型干酪根的烃源岩中气态烃中甲烷和乙烷等轻组分的含量也高。在碳酸盐岩样品的热模拟过程中，在高温范围内产生了大量的气态碳氢化合物。

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