英吉苏凹陷原油碳同位素地球化学特征及其地质意义
Xinjiang Petroleum Geology（2007）
Abstract
塔里木盆地英吉苏凹陷目前所揭示原油分子碳同位素分布呈现明显二阶段模式,显示该地区具两期成藏特征:一期为以龙口1井为代表的正常原油成藏,油源主要与下奥陶统沉积有关(以英东2井4 171-4 175 m地层为对比源岩);另一期为以英南2井为代表的高演化凝析油气成藏,其轻烃组成可能属于干酪根高演化阶段产物,而非原油裂解成因.
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Key words
Yingjisu sag,cracking,kerogen,carbon isotope,Tarim basin
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