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运用先进的分析测试手段对来自酒西盆地六个油田的 2 0多个油样进行了全油碳同位素、饱和烃气相色谱与质量色谱及正构烷烃分子碳同位素等较为全面的分析与研究。确定源岩相、水洗、生物降解作用与成熟度不是酒西盆地石油非均质性的控制因素。最后选取 1 5个油样进行中性吡咯氮化合物分析 ,用中性吡咯氮中的咔唑类化合物作为运移参数 ,较为详细地研究原油的运移分馏作用。此类化合物作为运移参数的基本原理是石油运移过程中 ,不同结构的咔唑类化合物与水及岩石中矿物发生吸咐作用的强烈程度不同 ,导致不同的运移分馏作用。根据咔唑类化合物的变化得出控制酒西盆地石油组成非均质性的主要因素是油气运移分馏作用 ,证实酒西盆地石油运移方向主要是从西至东 ,青西凹陷是其油源区
Using advanced analytical methods, more than 20 oil samples from six oil fields in the Jiuxi basin have been analyzed and studied comprehensively in terms of total oil carbon isotopes, gas chromatography and mass spectrometry of saturated hydrocarbons, and molecular carbon isotopes of n-alkanes. Determining source rock facies, washing, biodegradation and maturity are not the controlling factors of oil heterogeneity in Jiuxi basin. Finally, 15 oil samples were selected for neutral pyrrole nitrogen analysis. The carbazole compounds in neutral pyrrole nitrogen were used as transport parameters to study the migration and fractionation of crude oil in more detail. The basic principle of these compounds as transport parameters is that during the migration of petroleum, the carbamates with different structures have different absorption intensities from the minerals in water and rock, resulting in different migration and fractionation effects. According to the change of carbazole compounds, the main factor controlling the heterogeneity of petroleum composition in Jiuxi basin is the migration and fractionation of oil and gas, confirming that the petroleum migration direction in Jiuxi basin is mainly from west to east and that of Qingxi depression is its oil Source area