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通过研究指示石油成熟度的两种生物标记物——甾烷和萜烷,揭示了未熟油的早期生成及其条件。早期演化阶段可以生成未熟油,这种生油过程发生在有机质本身富含类脂沥青的那些地层。在新生代硅质层,这种类脂沥青是一种含沥青质的细菌—植物成固有机质,而沥青质是由浮游植物的类脂质和细菌脂质形成的,后两者中则含有大量的杂元素(硫和氧)。树脂—沥青质可溶络合物是液态烃的主要生源。
By studying two biomarkers, steranes and terpanes, that indicate oil maturity, the early generation of unripe oil and its conditions were revealed. Early stages of evolution can generate immature oil, a process that occurs in those formations where the organic matter itself is rich in lipid bitumen. In the Cenozoic siliceous layer, this lipid bitumen is an asphaltene-containing bacterium, which is a plant-derived organic matter, whereas asphaltenes are formed from phytoplankton-like lipids and bacterial lipids, and the latter contain large amounts Of the other elements (sulfur and oxygen). Resin-Asphaltene Soluble Complex is the main source of liquid hydrocarbons.