岩性油气藏 ›› 2015, Vol. 27 ›› Issue (6): 87–96.doi: 10.3969/j.issn.1673-8926.2015.06.012

• 油气地质 • 上一篇    下一篇

鄂尔多斯盆地西部奥陶纪岩相古地理特征

吴兴宁 1,孙六一2,于 洲 1,任军峰2,丁振纯 1,黄正良 2   

  1.  1. 中国石油杭州地质研究院,杭州 310023 ; 2. 中国石油长庆油田分公司 勘探开发研究院,西安 710018
  • 出版日期:2015-12-20 发布日期:2015-12-20
  • 第一作者:吴兴宁( 1973- ),男,博士,高级工程师,主要从事碳酸盐岩沉积学和储层地质学方面的研究工作。 地址:( 310023 )浙江省杭州市西湖区西溪路 920 号杭州地质研究院。 E-mail : wuxn_hz@petrochina.com.cn 。
  • 基金资助:

    国家“十二五”攻关项目一级专题“海相碳酸盐岩沉积与有效储层大型化发育机理与分布研究”(二期)(编号: 2011ZX05004-002 )资助

Lithofacies paleogeography of Ordovician in western Ordos Basin

Wu Xingning 1,Sun Liuyi 2,Yu Zhou 1,Ren Junfeng2,Ding Zhenchun 1,Huang Zhengliang2   

  1.  1. Petrochina Hangzhou Research Institute of Geology , Hangzhou 310023 , China ; 2. Research Institute of Exploration and Development , PetroChina Changqing Oilfield Company , Xi ’ an 710018 , China
  • Online:2015-12-20 Published:2015-12-20

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。

关键词: CO2 驱, 地质埋存, 提高气藏采收率, 衰竭干气藏, 低渗致密气藏

Abstract:

 Based on the analysis of outcrop, drill cores, thin section and logging data, six types of sedimentary facies and ten kinds of microfacies of Ordovician were identified in western Ordos Basin. Affected by the continuous expansion of Helan aulacogen, the sedimentary models of Ordovician in northern Ordos Basin are significantly different in different periods. From the Early Ordovician to the Middle Ordovician, the sedimentary model transformed from gentle slope platform gradually to platform-slope-basin. The ramp facies of Zhuozishan Formation and platform edge facies of kelimoli Formation are mainly of limestone, bioclastic limestone and oolitic limestone, which provides an important material basis for the development of high quality reservoirs. Wulalike Formation and Lashizhong Formation developed deepwater basin facies mudstone and lime mudstone, and they are favorable facies belt for the development of hydrocarbon source rocks.

Key words: CO2 flooding, geological storage, enhanced gas recovery, depleted gas reservoirs, low permeability tight gas reservoir

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