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塔东南盆地发育侏罗系陆相煤系地层和白垩系红层 ,勘探程度低。为研究中生代地层的分布和对比 ,沉积特征及勘探方向 ,重点对侏罗系进行了露头层序地层学分析。建立了五个三级层序。层序 1以正旋回的冲积扇或辫状河相为主 ,储集条件良好 ,层序 2发育正旋回及反旋回的三角洲相 ,具有良好储集条件 ,上部有较好的生油岩 ,层序3为反旋回的三角洲相及湖相韵律层 ,是良好生油层和盖层 ,层序 4为正旋回的河流相 ,层序 5为正旋回的干旱气候下冲积扇相 ,可形成次生溶孔发育的良好储层。塔东南侏罗系分布广泛 ,有良好的油气前景 ,是重要的含油气层系。
In the southeastern basin, Jurassic continental facies coal-bearing strata and Cretaceous red beds are developed with a low degree of exploration. In order to study the distribution and contrast of Mesozoic strata, sedimentary characteristics and exploration direction, the outcrop sequence stratigraphy analysis of the Jurassic system was focused. Five third-level sequences have been established. The sequence 1 is dominated by normal cyclic alluvial fan or braided river facies, with good reservoir conditions, normal and reverse cyclone facies in Sequence 2, favorable reservoir conditions and better source rocks and layers Sequence 3 is the anticlockdated facies of the delta facies and the lacustrine facies, which is a good oil-bearing layer and caprock. Sequence 4 is a positive-swirling fluvial facies, and sequence 5 is an alluvial fan facies in arid climates with a positive cycle, forming a secondary Well-developed porosity reservoir. Jurassic southeastern tower is widely distributed, with good prospects for oil and gas, is an important petroleum system.