柴达木盆地中、新生界含油气系统演化

柴达木盆地的中、新生界可划分出侏罗系、第三系和第四系三大含油气系统。其中侏罗系含油气系统的油气资源各占一半，第三系是以含油为主的含油气系统，第四系是以含气为主的含油气系统。并对这三大含油气系统的形成及演化进行了分析。根据烃源岩及其生成油气的分布，划分出各含油气系统的分布范围：侏罗系含油气系统分布在盆地北部，以北缘块断带为主的东西向展布的条带，向南可延至碱山、鸭湖、盐湖；第三系含油气系统以盆地西部——茫崖坳陷为主，向东可延至一里沟、红三旱四号、船形丘及黄石构造一带；而第四系含油气系统以盆地中-东部的三湖坳陷为主。

Formation and Evolution of Meso-Cenozoic Petroleum Systems in Caidam Basin

This paper divides Meso-Cenozoic in Caidam basin into three petroleum systems of Jurassic,Tertiary and Quaternary,among which Jurassic system is oil and gas half system,Tertiary is one dominated by oil,and Quaternary is one by gas.The formation and evolution of these three petroleum systems are analyzed.Based on the distribution of source rocks and generated oil and gas,the ranges of each system distribution are classified:Jurassic petroleum system is in northern Caidam basin,with E-W stretching band dominated by fault block zone in its northern margin toward Jianshan,Yahu and Yanhu areas in south;Tertiary petroleum system is mainly along Mangya depression in west-ern Caidam basin,stretching along Yiligou,Hongsanhan No.4,boat like dome and Huangshi Structures;while Quaternary gas-bearing system is distributed in Sanhu depression of center-eastern Caidam basin.