吐—哈盆地是位于天山造山带内的具复杂演化历史的中新生代叠合盆地 ,是典型的煤成烃陆相含油气盆地。盆地南带的前侏罗系 (三叠系 )油气藏其含油砂体的形成明显受沉积相、高地温和印支运动的影响 ,分布于盆地南部的扇三角洲砂体裙在印支运动中由于地层抬升而处于与盆地北部生烃中心接触良好的位置 ,并且具备了产生次生孔隙的动力学基础 ,从而及时接受了由于岩浆体热和印支构造热事件提供的热所形成的早成熟油 ,形成了该盆地第一套优质储油砂体。盆地北带的侏罗系油气藏其含油砂体以南物源辫状河三角洲相为主 ,次为北物源扇三角洲相 ,具有砂体层数多、上下叠置性强、原始物性好、与多层煤系烃源岩互层、烃类向南运移距离短的特点 ,形成以中侏罗统西山窑组、三间房组和七克台组为基础的第二、三、四套优质储油砂体 The Tu-Hase basin is a Meso-Cenozoic superimposed basin with complex evolution history located in the Tianshan orogenic belt. It is a typical coal-formed hydrocarbon-bearing continental basin. The formation of oil-bearing sand bodies in the Pre-Jurassic (Triassic) reservoirs in the southern belt of the basin was significantly affected by sedimentary facies and high-temperature moderate Indosinian movements. The fan-delta sand skirts distributed in the southern part of the basin during the Indo- The strata are uplifted and in good contact with the hydrocarbon generation center in the northern part of the basin and have a kinetic basis for the formation of secondary pores in order to receive in time the early mature oil formed as a result of the heat of the magma body and the heat provided by the Indosinian tectono-thermal event , Forming the first high-quality oil-bearing sandbody in the basin. The Jurassic reservoirs in the northern zone of the basin are dominated by braided river delta facies to the south of the oil-bearing sand body, followed by the north source fan-delta facies, with many layers of sand bodies, strong superimposition and good original properties , Interbedded with multi-layer coal-bearing source rocks and short hydrocarbon migration to the south to form the second, third and third sediments based on the Middle Jurassic Xishanyao, Sanfangfang and Qikatai formations, Four sets of high quality oil sands body