准噶尔盆地西北缘白碱滩油砂成矿因素分析  

Mineralization factors of Baijiantan oil sand in northwest Junggar Basin

作　　者：金文辉[1] 周文[1] 张银德[1] 于雷[1] 牛会玲[1] 

机构地区：[1]油气藏地质与开发工程国家重点实验室成都理工大学,四川成都610059

出　　处：《特种油气藏》2009年第6期19-21,95,共3页Special Oil & Gas Reservoirs

基　　金："十一五"国家科技支撑计划重点项目"非常规油气评价技术及装备研究"(2006BAB03B08)

摘　　要：对白碱滩油砂矿区油砂的分布、油源、储集砂体、油气运移通道等成矿因素进行分析。该区油砂主要分布于白垩系吐谷鲁组和侏罗系齐古组,且分布面广、含油率中等;含油层系主要是来自玛湖坳陷中二叠系风城组;齐古组、吐谷鲁组主要为河流三角洲沉积,该环境下形成的良好砂体为油气聚集提供了储集空间;断裂、不整合面作为油气运移通道,控制了油气的运移;并在此基础上建立了符合该地区的"披覆型"、"沥青封堵型"和"上倾尖灭型"3种成矿模式,对今后该地区油砂勘探具有一定的指导意义。This paper analyzes the mineralization factors of Baijiantan oil sand area such as oil sand distribution,oil sources,reservoir sand,and migration pathway.The oil sands in this area mainly distribute in Cretaceous Tugulu formation and Jurassic Qigu formation.The distribution is extensive and the oil-bearing rate is medium.The oil-bearing series mainly exist in mid-Permian Fengcheng formation in Mahu depression.Qigu and Tugulu formations are mainly fluvial-delta deposition where favorable sand bodies had formed and served as reservoir space for hydrocarbon accumulation.Fractures and surface of unconformity were migration pathways and dominated oil and gas migration.On the above basis,three mineralization models are established for this area,including 'drape type','bitumen seal type' and 'updip pinch-out type',which may guide future oil sand exploration in this area.

关 键 词：准噶尔盆地 油砂 成矿因素 运移通道 成矿模式 

分 类 号：TE121[石油与天然气工程—油气勘探]