准噶尔盆地乌—夏地区侏罗系层序地层学研究SEQUENCE STRATIGRAPHIC ANALYSIS OF THE JURASSIC STRATA IN WUXIA AREA,JUNGGAR BASIN
杨怀宇,陈世悦,杨俊生,夏雨,张鹏飞,李聪
摘要(Abstract):
以Vail经典层序地层学理论为基础,综合运用乌—夏地区地震、钻井和测井资料,在各层序井—震联合标定的基础上,建立准噶尔盆地西北缘乌—夏地区侏罗系层序格架,将侏罗系划分为2个超层序7个层序,并分析研究了侏罗纪不同层序的展布特征、体系域构成及沉积体系展布。乌—夏地区侏罗纪层序特征在厚度总体上呈现由斜坡区至冲断带(由南至北)厚度减薄的趋势,沉积环境早期(JSQ1—JSQ4)以较干旱的冲积扇、辫状河沉积至中期(JSQ4—JSQ5)的扇三角洲、三角洲和湖泊相类型为特征,晚期(JSQ6—JSQ7)又转变为较浅水的冲积扇、辫状河的沉积环境。
关键词(KeyWords): 层序地层;层序特征;沉积体系;沉积环境;侏罗系;乌—夏地区;准噶尔盆地;新疆
基金项目(Foundation): 新疆油田公司项目“准噶尔盆地西北缘滚动精细勘探”资助
作者(Author): 杨怀宇,陈世悦,杨俊生,夏雨,张鹏飞,李聪
DOI: 10.19839/j.cnki.dcxzz.2010.01.017
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