柴西油砂山油田油气地球化学特征与成因分布  

The Geochemical Characteristic and Origin of Youshashan Oil Field and Gas in the West Edge of Qaidam Basin

作　　者：刘臣[1] 李延钧[1] 邓柳萍[1] 张永庶[2] 司丹[2] 郭瑞超[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]中石油青海油田分公司,甘肃敦煌736202

出　　处：《西部探矿工程》2010年第6期74-77,共4页West-China Exploration Engineering

摘　　要：通过对天然气组成、油气碳同位素、原油轻烃等的综合研究,分析总结了油砂山油田油气的全烃地球化学特征,细分了不同油气的成因类型和可能来源,总结了油气成因分布规律。研究表明油砂山油田油气主要具有混合偏腐泥型成因的特征,油气演化程度适中,均处于成熟阶段,且油气同源。油砂山油田油气主要是来源于古近系的E13与E23烃源岩,与新近系烃源岩无关,具有二者混合贡献的特征,但局部混合比例不同。The paper adopts some methods such as gas composi- tion, light hydrocarbon and carbon isotope to illustrate geochemical charactistics of oil ＆ gas from Youshashan, identify the genetic type and source of the different genetic oil, and summarize the precept of different genetic oil＇s distribution. The result shows that oil ＆ gas is mainly hybrid-type and little sapropeltypel in Youshashan. The oil ＆ gas of Youshashan has moderate evolution of temperature and normal maturity index. The oil gas of Youshashan has the same source of genetic oil. The oil ＆ gas of Youshashan is mainly from source rocks of E31 and E32 in Paleogene with mixed characteristics of both. However, the proportion in different regions is different. The oil ＆ gas of Youshashan has no relationship with Neogene.

关 键 词：油气轻烃 碳同位素 天然气组成 油砂山 柴达木盆地 

分 类 号：TE132[石油与天然气工程—油气勘探]