羌塘盆地是发育在前泥盆结晶基底和上古生界浅变质褶皱基底之上以中生界海相沉积为主体的复合型残留盆地。它由北羌塘坳陷带、中央隆起带和南羌塘坳陷带 3个二级构造单元组成 ,主要发育三叠系和侏罗系两套生储盖组合。北羌塘坳陷带内 ,三叠系及侏罗系组合发育良好 ;中央隆起带内基本没有侏罗系组合 ,三叠系组合也仅分布于倾伏部位 ;南羌塘坳陷带内 ,三叠系组合发育良好 ,局部范围内也有较好的侏罗系组合。青藏高原的油气勘探实践表明 ,该区含油远景取决于构造运动的强弱及保存条件的好坏。结合生储盖组合情况 ,羌塘盆地可分为 3类含油气远景区 :北羌塘坳陷带有利区、南羌塘坳陷带有利区和中央隆起带次有利区 The Qiangtang Basin is a composite residual basin developed mainly on Mesozoic marine sediments on the former Devonian crystalline basement and the Upper Paleozoic metamorphic fold basement. It consists of three secondary tectonic units in the North Qiangtang Depression, the Central Uplift and the South Qiangtang Depression, and mainly consists of two reservoir-cap assemblages of Triassic and Jurassic. In the northern Qiangtang Depression, the Triassic and Jurassic assemblages developed well. There was no Jurassic assemblage in the central uplift and the Triassic assemblages were only located in the subduction. In the southern Qiangtang depression, The Triassic assemblages developed well and also had good Jurassic assemblages within the local area. The oil and gas exploration practice in the Qinghai-Tibet Plateau shows that the long-term oil content in this area depends on the strength of the tectonic movement and the quality of preservation. Combined with the combination of reservoir and cover, the Qiangtang Basin can be divided into three types of oil and gas prospect areas: the northern Qiangtang depression has the favorable area, the southern Qiangtang depression has the favorable area and the central uplift belt