摘要
库车油气系统天然气以烃类气体为主 ,克拉苏构造带天然气整体偏干 ,依奇克里克构造带天然气主要表现为湿气 ,前缘隆起地区则主要为凝析气。库车油气系统天然气的δ13 C2 、δ13 C3 和δ13 C4明显偏重 ,具有典型腐殖型天然气的特征 ,主要属于陆相腐殖型干气和陆相腐殖型湿气。综合分析认为 ,库车油气系统天然气主要源自三叠系、侏罗系湖相烃源岩 ,且侏罗系烃源岩的贡献大于三叠系烃源岩。
The natural gas found in Kuqa depression is mostly composed of hydrocarbons. Dry gas was mainly distributed in Kelasu structural belt, wet gas mainly in Yiqikelike structural belt and condensate gas mainly in frontal uplift area. The values of δ 13 C 2, δ 13 C 3 and δ 13 C 4 are on the heavy side, for example, the values of δ 13 C 2 are generally around 23‰, which indicates typical humic source rock derived gas. According to component and carbon isotope of the natural gas, the natural gas in Kuqa depression could be classified into 2 groups: humic wet gas and humic dry gas. By overall approach, the gas in Kuqa depression is mainly derived from the source rocks of Triassic and Jurassic, and the Jurassic source rock is more than Triassic source rock in the contribution to gas accumulation.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2002年第6期4-7,共4页
Petroleum Exploration and Development
基金
九五国家科技攻关项目"塔里木盆地天然气成藏条件及勘探方向"(99 111 0 1 0 3 0 4)
