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丝质体是煤中的主要组分之一 ,其在煤中含量的多少、生烃潜力的大小、生烃特性等直接影响煤成烃资源的评价。本文采用岩石热解、热解气相色谱以及开放体系下热模拟等方法 ,对山西繁峙老第三纪 (E3)煤中丝质体的生烃潜力、烃类组成特征、成烃演化规律进行了研究 ,并与贵州水城晚二叠世 (P2 1 )含树皮体煤中的主要组分 -树皮体进行比较。结果表明 :丝质体的生烃潜力、氢指数 (2 6 .18m g/ g、35 mg/ g· TOC)远低于树皮体的生烃潜力、氢指数 (2 97mg/ g、491mg/ g· TOC) ;丝质体有两个生烃高峰 ,所对应的 VR0 (% )分别为 1.1%和 2 .0 % ;丝质体产烃范围较宽 ,从 2 0 0℃可以延续到 6 0 0℃ ,甚至超过6 0 0℃还有少量的烃类物质生成 ;丝质体的烃类组成以轻质烃为主 ,湿气次之
Silica is one of the main components in coal. Its content in coal, the potential of hydrocarbon generation and the characteristics of hydrocarbon generation directly affect the evaluation of coal-forming hydrocarbon resources. In this paper, the hydrocarbon generation potential, hydrocarbon composition and hydrocarbon evolution of filamentous bodies in the Fanzhong Era coal from Shanxi Province were studied by using pyrolysis of rock, pyrolysis gas chromatography and thermal simulation under open system. The study was compared with the bark body, the major component of bark coal in the late Permian (P2 1), Guizhou Province. The results showed that the hydrogen potential (26.18 mg / g, 35 mg / g · TOC) of silk was much lower than that of bark, and the hydrogen index (2 97 mg / g, 491 mg / g · TOC). There were two peaks of hydrocarbon generation in the silk body, corresponding to VR0 (%) of 1.1% and 2.0% respectively. The wide range of hydrocarbon generation from the filamentous body was extended from 200 ℃ to 6 0 0 ℃, even more than 600 ℃ there is a small amount of hydrocarbon generation; filaments of the hydrocarbon composition of light hydrocarbons, followed by moisture