论文部分内容阅读
吐哈盆地台北凹陷主体原油性质表现为低密度、低硫、低凝固点、中等含蜡、富重碳同位素,总烃含量高,具有明显的姥鲛烷优势,富C_(29)甾烷等一系列典型的煤成油地化特征。油—源对比表明,盆地煤成油主力烃源岩为早、中侏罗世煤系地层中煤及沼泽环境下形成的泥岩。本文根据有机岩石学、有机地球化学(包括氢指数(IH)、氧指数(lo)、生烃潜量(S_1+S_2)等)、沉积环境(包括煤系泥岩形成的氧化还原性、水动力条件、沉积环境序列等)及植物组合等有机相标志,将本区煤系沼泽相泥岩划分出四种有机相类型,即干燥森林沼泽有机相,潮湿森林沼泽有机相,流水沼泽有机相及开阔水体沼泽有机相。流水沼泽
The main crude oil in the northern depression of Turpan-Hami basin is characterized by low density, low sulfur, low freezing point, medium wax and heavy carbon isotope, high total hydrocarbon content, obvious pristane advantage and rich C 29 sterane A series of typical coal into oil features. The oil-source correlation shows that the main source rock of coal-forming oil in the basin is mudstone formed in the coal and marsh environment of the early Jurassic coal measures strata. Based on organic petrology, organic geochemistry (including hydrogen index (IH), oxygen index (LO), hydrocarbon generation potential (S 1 + S 2) and so on), the sedimentary environment including redox potential of coal- Conditions, sedimentary environment sequences, etc.) and plant assemblages. Four types of organic facies are divided into four types of organic facies, namely dry forest swamp organic phase, humid forest swamp organic phase, flowing swamp organic phase and open Water body swamp organic phase. Flowing swamps