银额盆地查干凹陷烃源岩生烃潜力及地化特征  

Hydrocarbon-generating Potential and Geochemical Characteristics of Source Rock in Chagan Sag,Yin-E Basin

作　　者：徐猛[1] 罗小平[1] 马少妍[1] 李鹏[1] 

机构地区：[1]成都理工大学能源学院,四川成都610059

出　　处：《天然气技术与经济》2012年第5期28-32,78,共5页Natural Gas Technology and Economy

基　　金：中国石化重大科研攻关项目"银-额盆地查干凹陷油气富集主控因素研究"(P10001)

摘　　要：通过对银额盆地查干凹陷下白垩统3套主力烃源岩进行有机碳族组分、稳定同位素等测试分析,研究了其有机质丰度、类型和成熟度,并评价了其生烃潜力。结果表明,在该地区3套烃源岩中,以深灰色、灰黑色泥岩为主的巴二段为重要的生油层段。该段有机质丰度较高,有机质类型主要为Ⅱ1型,热演化程度达到中—高成熟阶段,部分地区已达过成熟。而苏一段和巴一段烃源岩有机质丰度不高且有机质类型以Ⅱ2型为主,据此评价为中—差烃源岩。综合判定该地区主力烃源岩具良好的生烃潜力。There are three sets of main source rocks for the Lower Cretaceous in Chagan Sag,Yin-E Basin.In this study,theo rganic carbon’s component and stable isotope are analyzed;at the same time,the organic matter’s abundance,type and maturity are explored;and the hydrocarbon-generating potential is evaluated.Results show that in these source rocks,Ba 2 Member,mainly composed of dark-gray and grey-black mudstone,is an important oil-producing layer.In this reservoir,the abundance of organic matter is high,the type is dominantly Ⅱ1,and the thermal evolution degree is in middle to high maturity,mostly in over maturity.However,for source rocks in both Su 1 and Ba 1 members,theira bundance is not very high and the type is mainly Ⅱ2;and theser eservoirs belong to middle to bad ones.After a comprehensivee valuation,it is demonstrated that the main source rocks in this are a have a better hydrocarbon-generating potential.

关 键 词：下白垩统 生烃潜力 查干凹陷 有机地球化学 

分 类 号：P618.13[天文地球—矿床学]