岩性油气藏 ›› 2015, Vol. 27 ›› Issue (6): 8796.doi: 10.3969/j.issn.1673-8926.2015.06.012
吴兴宁 1,孙六一2,于 洲 1,任军峰2,丁振纯 1,黄正良 2
Wu Xingning 1,Sun Liuyi 2,Yu Zhou 1,Ren Junfeng2,Ding Zhenchun 1,Huang Zhengliang2
摘要:
综合野外露头、钻井岩心、薄片观察以及测井等相关资料分析,在鄂尔多斯盆地西部奥陶系共识别出 6 种沉积相类型及 3 类 10 种微相序。 受贺兰坳拉槽持续性扩张的影响,鄂尔多斯盆地西部奥陶纪不同时期的岩相古地理展布具有明显的差异性,早奥陶世发育缓坡型台地沉积,至中奥陶世演化为台地— 斜坡—盆地沉积模式。 桌子山组内缓坡和克里摩里组台地边缘相沉积岩性以泥亮晶粉砂屑灰岩、生屑灰岩、鲕粒灰岩为主,为优质储层的发育提供了重要的物质基础。乌拉力克组—拉什仲组发育深水盆地相泥岩、含灰泥岩,是烃源岩发育的有利相带。
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