准噶尔盆地南缘芦草沟组沉积演化及其对油页岩分布的控制

新疆大学 地质与矿业工程学院,新疆 乌鲁木齐 830047

准噶尔盆地南缘; 芦草沟组; 油页岩; 沉积演化; 分布控制

Distribution of the oil shale by sedimentary evolution in the Lucaogou Formation in southern margin of Junger Basin
FENG Shuo,TIAN Ji-jun,SUN Ming-he,CHENG Gan-lu,LIU Qiang

(Geology and Mining Engineering Academy,Xinjiang University,Urumqi 830047,China)

Southern margin of Junger; Lucaogou Formation; oil shale; sedimentary evolution; distribution control factors

DOI: 10.13800/j.cnki.xakjdxxb.2015.0407

备注

在准噶尔盆地南缘山前露头与钻孔中普遍见有巨厚的中二叠统油页岩沉积,其成因及分布范围一直富有争议。应用经典层序地层学理论,通过大量的钻井、测井资料、露头剖面资料的分析,识别出全区可对比的三级层序界面,并根据地层叠置样式、岩性、岩相的变化以及地球化学和古生物资料等细分出低位、湖侵和高位体系域,在连井剖面层序对比的基础上建立了准噶尔盆地南缘中二叠统芦草沟组以四级层序为单元的等时层序地层对比格架。在等时地层格架下,详细分析了二叠系中统芦草沟组沉积环境的演化特征,并进一步确定以妖魔山、水磨沟、三工河、吉木萨尔为沉积中心的油页岩分布范围,为进一步的油页岩矿开发提供了必要的理论支持。

Oil shale sedimentary of Middle Permian was found in drilling and piedmont outcrop in southern margin of Junger.There are many arguments about the causes and enrichment areas of oil shale.This article depends on the classic Sequence Stratigraphy and analysis of drilling,well logging,outcrop,data to distinguish the third-order sequences boundary that contrast in research areas.Moreover,this article relies on the conversion of stacked style of stratum,lithology,generalized facies and biota data to set off HST,EST,LST.The research regards correlation profiles of sedimentary sequences as the foundation to building a sequence framework made by fourth-order sequences unit in the middle Permian Lucaogou Formation in southern margin of Junger.Under this sequence framework,this continental,opened,and offshore lake-basin was determined by analysis of deposition environment in the middle Permian Lucaogou Formation.Moreover,the oil shale widely developed areas in Yaomo Mountain,Shuimogou,Sangong River,Jimusaer center for the deposition,were obtained as the most mining valuable areas.This research also offers a necessary theoretical support for oil shale development.