摘要
低熟油气是我国的一种重要油气资源,在我国陆相沉积、尤其是东部第三系盆地中较为富集。原油的类型包括重质油、蜡质原油、正常原油、轻质油等。低熟油气的总烃馏分中常含有较多的生物标志物,成熟度参数C_(29)甾烷20S/(20S+20R)常小于0.4。其生烃组分有树脂体、木栓质体、一些种类藻以及经细菌改造的有机质。本文对低熟油的成因与生烃机制进行了探讨。
A variety of immature-low mature oils have been reported in China. They are rich in continental deposits, especially in Tertiary basins in eastern China. The oil types include heavy oil, waxy oil, normal oil, light oil, etc.. Because of their low thermal evolution characteristics, there are a number of biological markers in the immature-low mature oils in their total hydrocarbon fractions. The maturity index C_(29) sterane 20S/(20S+20R)are often below 0.4. Their characters are summarized in this paper. The organic petrology and petroleum geochemistry studies show that early oil generating macerals may include resinite, suberinite, some kinds of algaes (Botryococcus, Coccolithaceae, etc.), and microbe improving organic matters. The low mature oil generation mechanism have been disscussed herein. The statistics indicate that the immature-low mature oil is one kind of important resources in China. A study of them will be benefit to oil exploration.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1993年第6期38-45,共8页
Petroleum Exploration and Development
