羌塘盆地油气有利勘探区块

FAVORABLE BLOCKS FOR HYDROCARBON EXPLORATION IN QIANGTANG BASIN

羌塘盆地在晚古生代至侏罗纪期间接受了巨厚的海相沉积，具备良好的成油气物质基础。根据变形特征及基底格架，羌塘盆地可以划分为北羌塘坳陷、冈玛错－西亚尔岗隆起、南羌塘拗陷等三个二级构造区块。北羌塘坳陷油气组合发育完整，后期改造破坏较弱，是最有利的勘探区块，其中的多格错仁西、曲龙河－错尼、东湖等三个区，可作为羌塘盆地油气勘查的首选目标。

Marine sediments with enormous thickness deposited in Qiangtang Basin, North Tibet inLate Paleozoic-Jurassic. This provides favourable material base for hydrocarbon generation.According to the deformation feature and the framework of the basin's basement,the basincould be divided into three tectonic units as North Qiangtang Depression,GangmacuoXiyargang Uplift and South Qiangtang Depression. The North Qiangtang Depression is considered as the most prosperous one for hydrocarbon exploraton due to its well-developedsource-reservoir-cap assemblage and relatively gentle deformation and transformation. Duogecuorenxi, Qulonghe-Cuoni and Donghu in the depression are the most favourable blocksand could be taken as the first targets for oil exploration