柴达木盆地北缘是一个老油区,中、下侏罗统是主要烃源岩。通过区域研究,将侏罗系划为3统4组,即下侏罗统小煤沟组,中下侏罗统大煤沟组,上侏罗统红水沟组和采石岭组,其中大煤沟组可细划分7段。对钻遇侏罗系的38口井逐次进行了划分和对比,总结了下侏罗统、中侏罗统的沉积特征。在此基础上划分出下侏罗统含油气系统和中侏罗统含油气系统,提出冷湖—南八仙弧形构造带、鄂博梁构造带为勘探有利区。 The northern margin of the Qaidam Basin is an old oil zone where the Middle and Lower Jurassic are the major source rocks. Based on the regional studies, the Jurassic is divided into Group 3 and Group 4, that is, the Xiaoganggou Formation of Lower Jurassic, the Daitougou Formation of Middle-Lower Jurassic, the Upper Jurassic Hongshuigou Formation and the Caoshiling Formation. Among them, Ditch group can be divided into seven sections. Thirty-eight wells drilled in the Jurassic were successively divided and compared to summarize the sedimentary characteristics of the Lower Jurassic and Middle Jurassic. Based on this, the lower Jurassic petroleum system and Middle Jurassic petroleum system are divided, and the cold lake-Nanbaxian arc structural zone is proposed, while the E’Booliang structural belt is the favorable exploration area.