柴达木盆地北缘侏罗系烃源岩干酪根^(13)C核磁共振研究  

^(13)C NMR RESEARCH ON THE KEROGENS OF JURASSIC HYDROCABON SOURCE ROCK IN THE NORTHEN EDGE,QAIDAM BASIN

作　　者：彭立才[1] 韩德馨[2] 邵文斌 刘青文 

机构地区：[1]清华大学力学系,北京100084 [2]中国矿业大学,北京100083 [3]中国石油青海油田分公司,甘肃敦煌736202

出　　处：《石油学报》2002年第2期34-37,共4页Acta Petrolei Sinica

基　　金：青海省科技攻关项目"柴达木盆地马仙地区石油地质综合评价"(98 G 2 1 6)部分成果

摘　　要：柴达木盆地北缘是柴达木盆地三大油气区之一 ,其源岩为早、中侏罗世煤系地层。烃源岩有机质类型以Ⅲ1型和Ⅱ型干酪根为主 ,Ⅰ2 型干酪根仅在局部地区有分布。通过对柴达木盆地北缘侏罗系烃源岩中不同类型干酪根的13 C核磁共振研究 ,指出了研究区Ⅰ2 、Ⅱ、Ⅲ1型干酪根的化学结构特征以及化学结构中“芳构碳”、“油潜力碳”与“气潜力碳”的相对含量 ,据此从定量分析的角度对不同类型干酪根的生油气贡献作了评价。Ⅰ2 、Ⅱ、Ⅲ1型干酪根的生烃能力依次减弱 ,对生油的贡献也依次减弱 ,且生成油气的比例不同 ,Ⅰ2 、Ⅱ型干酪根以生油为主 ,Ⅲ1型干酪根则以生气为主。The northern edge in Qaidam Basin is one of the three hydrocarbon bearing areas in the basin.Its source rock is the early and middle Jurassic coal measures.Organic matter types of source rock are mainly type Ⅲ 1 and type Ⅱ Kerogen,type Ⅰ 2 Kerogen distributes only at some limited areas.By 13 C nuclear magnetic resonance research on different types of Kerogen of Jurassic hydrocarbon source rock in the northern edge,the paper gives the chemical structure of the typeⅠ 2?Ⅱ?Ⅲ 1 Kerogen in the studied area and the relative content of 'oil potential C','gas potential C','aromatic C'in the chemical structure,based on which the paper evaluates the contribution of different types of Kerogen to the generation of oil and gas through quantitative analysis.The paper draws the conclusion that hydrocarbon_generating potential of the typeⅠ 2?Ⅱ?Ⅲ 1 Kerogen decrease and their contribution to the oil generating also decrease and the ratio of oil or gas generated depends on the type of Kerogen.Type Ⅰ 2 and type Ⅱ Kerogen generate mainly oil and type Ⅲ 1 Kerogen mainly generates gas.

关 键 词：化学结构 化学位移 生烃潜力 油气勘探 柴达木盆地 北缘侏罗系 烃源岩干格根 ^13C核磁共振 研究 

分 类 号：P618.13[天文地球—矿床学] TE13[天文地球—地质学]