CB油田C3断块原油饱和烃地球化学特征

Geochemical characteristics of saturated hydrocarbon from C3 fault block of CB Oilfield

运用GC-MS分析技术系统剖析C3断块原油饱和烃的地球化学特征,认为C3断块阜一段原油与泰一段、赤山组原油为不同成因类型的原油。尽管原油正构烷烃都以nC25为主峰碳,且都呈现明显的后峰型分布,但主要烃组分比值明显不同。分析结果显示,浅部的阜一段原油成熟度高于深部的泰一段、赤山组原油,同样显示了原油成因类型的差异。

The geochemical characteristics of saturated hydrocarbon from C3 fault block are systematically analyzed by GC - MS. The results show that the genetic types of crude oils in the first member of Funing Formation （Elf1 ） are different from ones in the first member of Taizhou formation （ K2t1 ） and Chishan Formation （ K2c）. Although the main peaks of n - alkanes from the E1 f1, K2t1 and Kze crude oils are nC25, the ratio of the main components of saturated hydrocarbons are different. The parameters show that the maturity of crude oils from shallow E1f1 is much higher than ones from deep K2t1 and Kzc,which display the diversity of the crude oils genetic type in this region.