摘要
西湖凹陷原湍以密度低的凝析油和轻质油为主，含蜡量低、饱和烃含量高、姥／植比大、碳同位素偏重，均为成熟原油，主要来自中－上始新统平湖组。天然气的成因类型有生物气、热解气和深源气，产层的天然气以热解气为主，分布广、产气量大，其主体组分（Ｃ１￣Ｃ５）应来自成熟度更高的下始新统，次要组分（Ｃ６＾＋）仅反映了原油伴生敢的特征。
The crude oil in Xihu Trough have the characteristics of low density.low content of paraffin.high content of saturated hydrocarbon.high value of Pr/Ph.heavier carbon isotope .mature crude oil. It reveals that the crude oil mainly come from the middle - upper Eocene Series Pinghu formation. The genetic type of natural gas can be divided into biogenic gas .thermogenetic gas.mixed gas from deeper source. The natural gas was dominated by thermogenetic gas. Dominant constituent (C1 - C5)of natural gas in the reservoirs come from the lower Eocene Series. Minor constituent (C6+) of natural gas in the reservoirs only reflecter the character of associated gas.
出处
《海洋石油》
CAS
2000年第2期1-7,共7页
Offshore Oil
