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为了研究原油芳烃在沉积环境方面的指示作用,采用色谱-质谱仪对塔中地区海相原油、柴达木盆地咸水湖相原油、冀中坳陷淡水湖相原油以及吐哈盆地煤成油等31个原油样品进行了全油GC-MS分析.研究结果表明:芳构化二萜类的卡达烯和惹烯的丰度指示着高等植物输入强度,海相和咸水湖相原油卡达烯在萘系列中的质量分数小于0.24%,惹烯在菲系列中的质量分数小于1.21%,淡水湖相原油和煤成油中这两个值分别为0.12%~8.65%和0.71%~20.03%;硫芴和氧芴可能来自同一先质,而芴具有不同的成因,硫芴/氧芴可以反映氧化还原环境,海相和咸水湖相原油该值一般大于0.7,淡水湖相原油为0.48,煤成油小于0.14;硫芴/菲是区分海相原油(>0.25)与陆相原油(<0.2)最有效的参数;咸水湖相原油以高的三芳甾烷丰度(三芳甾烷系列/芳烃总量>12%)和C26/C28(20S)三芳甾烷比值(>0.45)为特征;煤成油中往往含有完整的苯并藿烷系列.
In order to study the role of aromatics in the depositional environment, the authors used chromatographic-mass spectrometry to analyze the marine oil in the Tazhong area, the saltwater lake facies crude oil in the Qaidam basin, the freshwater lacustrine crude oil in the Jizhong depression, and the oil formation in the Turpan- Oil samples were analyzed by GC-MS.The results show that the abundance of the catechins and the enanthrene of aromatized diterpenoids indicates the input intensity of higher plants, In the series, the mass fraction is less than 0.24%, the mass fraction of henesene in the phenanthrene series is less than 1.21%, and the values of freshwater lacustrine crude oil and coal oil are 0.12% -8.65% and 0.71% -20.03%, respectively; Fluorene and fluorene may be from the same precursor, while fluorene has different causes. Fluorene / fluorene can reflect the redox environment. The values of marine and saline lakes are generally greater than 0.7, freshwater lacustrine crude oil is 0.48, and coal to oil Less than 0.14; Sulfrofluorene / phenanthrene is the most effective parameter to distinguish marine crude oil (> 0.25) from continental oil (<0.2); saltwater lake crude oil with high trioxane content (trioxane / total aromatics> 12%) and C26 / C28 (20S) triarylstane ratio (> 0.45) Contains a complete series of benzo hopane.