PETROLEUM GEOLOGIC CONDITION AND EXPLORATION TARGETS IN THE SOUTHEAST OF JUNGGAR BASIN
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摘要: 准噶尔盆地东南部发育了3套盆地原型,即P2—T2-3的后裂谷期充填盆地、T33—J1-2的裂谷后前渊盆地、J3—E的陆内前陆盆地的并列叠加作用;发育了3套主力生油岩系,即上二叠统芦草沟组、红雁池组和上三叠统黄山街组、郝家沟组及下、中侏罗统八道湾组、三工河组、西山窑组,并赋存于阜康凹陷、吉木萨尔凹陷、五彩湾凹陷、黄草湖凹陷之中,形成了多个供油中心。生储盖分析表明,该区油气保存条件良好,并具备在不同区块分别勘探油和油气的特点。构造分析表明,博格达推覆构造和2组(近南北向和近东西向)断块构造与油气生成、运移、聚集关系密切。综合分析表明,该区油气成藏地质条件较好,是值得进一步工作的领域。Abstract: Three basin prototypes are generated in the southeast of Junggar Basin: filling basin in the post-rift sequence(P2-T2-3),foredeep basin in the post-rift sequence(T33-J1-2) and intracontinental foreland basin(J3-E).There are three sets of major hydrocarbon source rocks: the Lucaogou and Hongyanchi Formations of the Upper Permian,the Huangshanjie and Haojiagou Formations of the(Upper) Triassic and the Badaowan,Sangonghe and Xishanyao Formations of the Lower and Middle Jurassic,located in the Fukang,Jimusaer,Wucaiwan and Huangcaohu Sags,forming multiple petroleum supply centers.The research region is good for petroleum preservation.Oil and gas can be explored in different blocks.The Bogda nappe structure and the two fault blocks(approximately SN and EW) are closely related to hydrocarbon generation, migration and accumulation.Hence this region is worth exploring further.
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