摘要
鄂尔多斯盆地长7段具有较好的页岩油资源潜力。长7段砂岩夹层型页岩油的勘探开发已经取得了实质性突破,泥页岩型页岩油的勘探开发潜力巨大,是长庆油田未来重要的油气接替资源,但其相关地质基础性研究相对薄弱。通过对宁228井长7段全取心段厘米级岩心观察描述及系统采样,一系列实验测试分析及鉴定结果表明:长7段主要发育黑色页岩、暗色泥岩、粉细砂岩及凝灰岩4种岩石类型;长7段烃源岩整体条件优越,泥页岩有机碳含量高,生烃潜力大,有机质类型以Ⅰ型、Ⅱ型为主,均处于低成熟-成熟阶段,其中黑色页岩具有更高的有机质丰度;长7段主要储集空间为原生孔隙和次生孔隙,泥页岩主要发育有机孔和无机孔,粉细砂岩主要发育残余粒间孔、粒内孔和粒间孔,凝灰岩则以粒间孔、矿物粒内孔为主;长7段整体含油性较好,但可动性差异性大,砂岩、凝灰岩的流体可流动性较好,泥页岩的可流动性较差。总之,典型夹层型页岩油精细解剖分析可以为推动鄂尔多斯盆地页岩油规模性开发提供有利指导。
The Chang 7 Member of the Ordos Basin has favorable shale oil resource potentiality.The exploration and development of sandstone interlayer shale oil in the Chang 7 Member has made substantial breakthroughs.The exploration and development potential of shale oil is huge,and will be a significant oil and gas alternative resource in the Changqing Oilfield in the future,but its related geological fundamental research is relatively weak.Based on the observation,description and systematic sampling of the centimeter-level core of the full core section of Chang 7 Member in Well Ning228,a series of experimental test analyses and identification outcomes indicated that Chang 7 Member primarily developed four rock types:Black shale,dark mudstone,siltstone and tuff.The overall conditions of source rocks in the Chang 7 member are superior,the organic carbon content of shale is high,and the hydrocarbon generation potential is large.The organic matter types are mainly typeⅠand typeⅡ,which are in the low mature-mature stage,and the black shale has higher organic matter abundance.The main reservoir spaces of the Chang 7 Member are primary pores and secondary pores.Mud shale primarily develops organic pores and inorganic pores.Fine sandstone mainly develops residual intergranular pores,intragranular pores and intergranular pores.Tuff mainly develops intergranular pores and mineral intragranular pores.The overall oil-bearing property of the Chang 7 Member is good,but the mobility difference is large.The fluid mobility in sandstone and tuff is good,and the mobility inshale is poor.In short,fine anatomical analysis of typical interlayer shale oil provides favorable guidance for promoting the large-scale development of shale oil in the Ordos Basin.
作者
辛红刚
田杨
冯胜斌
岳贤和
陈薪凯
淡卫东
罗顺社
Xin Honggang;Tian Yang;Feng Shengbin;Yue Xianhe;Chen Xinkai;Dan Weidong;Luo Shunshe(The Exploration and Development Research Institute of Changqing Oilfield,Xi′an 710200,China;Cooperative Innovation Center of Unconventional Oil and Gas of Ministry of Education&Hubei Province,Yangtze University,Wuhan 430100,China;School of Geosciences,Yangtze University,Wuhan 430100,China)
出处
《地质科技通报》
CAS
CSCD
北大核心
2023年第3期114-124,共11页
Bulletin of Geological Science and Technology
基金
湖北省教育厅科学研究计划资助项目(Q20221311)
非常规油气省部共建协同创新中心开放基金项目(UOG2022-40)。
关键词
鄂尔多斯盆地长7段
夹层型页岩油
沉积学特征
潜力评价
Chang 7 Member of the Ordos Basin
interlayer shale oil
sedimentological characteristics
potential evaluation
