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本文在严格的煤岩显微组分分离富集的基础上,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,系统地对贵州水城上二叠统龙潭组(P_3l)煤中角质体的生烃潜力、热解烃组成特征、生烃模式进行了研究。结果显示:角质体具有很高的生烃潜力,其S_1+S_2为308.33mg/g,远高于丝质体(S_1+S_2为26mg/g)和基质镜质体(S_1+S_2为192mg/g),而与树皮体(S_1+S_2为297mg/g)相当。另外,角质体为一种好的生油组分,其热解烃中油占了67％(197.47mg/g);角质体热解产物主要为碳数较低的正构烷烃、烯烃化合物,此外苯、烷基苯(甲苯、二甲苯)、萘系化合物所占比例较高,而姥鲛烷和植烷含量则较少。本区角质体的主要生烃区间介于420～450℃之间(对应的R_o为1.1％～1.5％),生烃高峰在425～435℃范围内,最大产烃率对应的温度为430℃。角质体这种生烃潜力高,并且在高成熟度下大量生烃的特点对在成熟度普遍较高的华南地区寻找油气田具有重要的现实意义。
On the basis of strict separation and enrichment of microscopic components of coal and rock, pyrolysis of rocks, pyrolysis gas chromatography and thermal simulation under open system were used to systematically study the accumulation of P_3l coal in Upper Permian, Mesozoic hydrocarbon generation potential, pyrolysis hydrocarbon composition characteristics, hydrocarbon generation mode were studied. The results showed that the hornblenc had high potential for hydrocarbon generation. The S_1 + S_2 was 308.33mg / g, which was much higher than that of the silk (S_1 + S_2 26mg / g) and the matrix vitrinite S_1 + S_2 192mg / g), but comparable to the bark (S_1 + S_2 of 297 mg / g). In addition, the horny body is a good raw oil component, with 67% (197.47mg / g) of oil in the pyrolysis hydrocarbon. The keratin pyrolysis products are mainly n-alkanes and alkenes with lower carbon number. In addition Benzene, alkylbenzene (toluene, xylene), naphthalene compounds accounted for a higher proportion, while pristane and phytane content is less. The main hydrocarbon generation intervals of the horny bodies ranged from 420 ℃ to 450 ℃ (corresponding to 1.1% -1.5% of R_o), and the peak of hydrocarbon generation ranged from 425 ℃ to 435 ℃. The maximum hydrocarbon generation rate corresponded to 430 ℃ . The high production potential of hornblende and its high hydrocarbon generation under high maturity are of great practical significance for the search for oil and gas fields in South China where maturity is generally high.