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从盆地演化的角度人手结合特提斯的变迁,讨论了羌塘盆地形成、发展及其消亡的历史.根据盆地内的地层和构造特征划分了沉积盆地演化的3个阶段、3种原型盆地,即早期冈瓦纳大陆边缘盆地,晚三叠世过渡性盆地,侏罗纪欧亚大陆边缘盆地.3种原型盆地反映3套含油气系统.晚侏罗世后开始形成构造盆地并产生构造圈闭.新生代的差异上升作用产生地貌盆地.沉积盆地、构造盆地及地貌盆地的连续性和统一性有利于油气的聚集和保存.重点讨论了侏罗系的生储盖条件及其组合和侏罗系变形特征.初步认为,羌塘盆地具丰富的烃源岩、良好的储集空间和较优越的封盖条件及良好的生储盖组合,圈闭形成期与油气运移期匹配良好.
From the perspective of basin evolution, the history of the formation, development and disappearance of the Qiangtang Basin was discussed based on the Tethyan changes.According to the stratigraphy and tectonic features in the basin, the three stages of sedimentary basin evolution were divided into three prototype basins, Ie early Gondwanaland continental margin basin, Late Triassic transitional basin and Jurassic Eurasian continental margin basin.The three prototype basins reflect three sets of petroleum systems.The tectonic basin began to form after the Late Jurassic and resulted in structural traps. The Cenozoic differences raise the role of geomorphic basins.The continuity and unity of sedimentary basins, tectonic basins and geomorphy basins are good for the accumulation and preservation of oil and gas.It focuses on the conditions of Jurassic reservoirs and their assemblages and Jurassic It is initially believed that the Qiangtang Basin is rich in source rocks, good reservoir space, superior sealing conditions and good reservoir-cap assemblage. The trap formation period is well matched with the hydrocarbon migration period.