摘要
通过研究区钻井岩心、野外露头裂缝系统观测与统计,岩心薄片观察分析,对鄂尔多斯盆地中西部上三叠统裂缝系统的分布特征及成因进行了分析。鄂尔多斯经历了多期构造运动,不同期次形成的裂缝系统在盆地内部不同构造单元表现出不一致性。研究区处在鄂尔多斯几个构造单元接触地带,构造裂缝为主要的裂缝类型,其分布在区域上表现出多样性。上三叠统主要发育NEE、NNW、NE、NW四组裂缝系统,其中为NNE向裂缝和NW向裂缝形成于燕山期,NNW向裂缝和NE向裂缝形成于喜山期。
analyzing split distribution and contributing factor of middle--west part of ordos basin in Upper Triassic, though drill core, field observe and counting, thin section analysis. Ordos basin happened multi--tectonic movement, split system of different stage in different building unit display nonuniformity. The region of interest lies on contacting area of several building unit. structural split is main style and dis- play multiplicity in area. Upper Triassic develops NEE, NNW, NE, NW four styles split. NNE and NNW direction splits formed in Yanshan--stage, and NNW NE direction splits formed in xishan--stage.
出处
《内蒙古石油化工》
CAS
2008年第24期1-3,共3页
Inner Mongolia Petrochemical Industry
基金
国家重点基础研究发展规划973课题(编号2003CB214601
2002CCC01400)资助
