松辽盆地南部长岭凹陷上白垩统沉积有机相研究  

Sedimentary Organic Facies Study of Late Cretaceous in Changling Sag of Southern Songliao Basin

作　　者：孙钰[1] 孙贺龙[2] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院 [2]辽河油田欢喜岭采油厂采油作业六区,辽河盘锦124114

出　　处：《应用基础与工程科学学报》2008年第4期537-545,共9页Journal of Basic Science and Engineering

摘　　要：以石油地质学和石油地球化学为理论指导,通过对长岭凹陷上白垩统烃源岩的有机岩石学、沉积学和有机地球化学特征的综合分析,将沉积有机相划为3种类型,即有机相A、有机相B和有机相B-C.3种沉积有机相类型中,有机相A腐泥组分含量较高,有机质类型为Ⅰ型,生烃性最好,具强生油力;有机相B腐泥组分含量较低,有机质类型以Ⅱ1为主,生烃性较好,具生油能力,有机相A、B主要分布在凹陷中心;有机相B-C有机质丰度低,显微组分以腐植型为主,生烃性较差,主要为油气混相,分布在凹陷边缘.Directed by the theories such as Petroleum geology and Petroleum geochemistry, the source rocks of late cretaceous in Changling sag of southern Songliao basin are divided into.organic facies A, organic facies B and organic facies B-C on the basis of the characteristics of organic petrology, sedimentology and organic geochemistry. Organic facies A has the highest sapropelinite, the organic matter is Ⅰtype with the best oil generation capacity; Organic facies B has lower sapropelinite, its organic matter is mainly Ⅱ1 type with relatively low hydrocarbon generation capacity; the both sedimentary organic facies are in the center of sag. Organic facies B-C contains low abundance of organic matters with humic substances as the main microsopic component, its organic matter is mainly Ⅱ2 type, its hydrocarbon generation capacity is the lowest and gas is the main product, it is in the fringe of sag.

关 键 词：烃源岩 沉积 育机相 长岭凹陷 上白垩统 

分 类 号：P593[天文地球—地球化学]