天然气地球科学

• 天然气地质学 • 上一篇    下一篇

鄂尔多斯盆地西南部延长组7段致密油充注影响因素分析

杨智峰,曾溅辉,韩菲   

  1. 1.中国石油大学油气资源与探测国家重点实验室,北京 102249; 
    2.中国石油大学(北京)地球科学学院,北京 102249;
    3.中国石油新疆油田分公司博士后工作站,新疆 克拉玛依 834000;
    4.联想(北京)有限公司,北京 100085
  • 收稿日期:2017-10-08 修回日期:2018-06-26 出版日期:2018-07-10 发布日期:2018-07-10
  • 作者简介:杨智峰(1987-),男,新疆克拉玛依人,工程师,博士(后),主要从事盆地流体分析与油气成藏研究.E-mail:yangzhifeng_2005@126.com.
  • 基金资助:
    国家自然科学基金重点项目(编号:41330139)资助.
     

Analysis of influencing factors on tight oil charging of the 7th member of Yanchang Formation  in southwestern Ordos Basin

Yang Zhi-feng,Zeng Jian-hui,Han Fei   

  1. 1.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China;
    2.College of Geosciences,China University of Petroleum,Beijing 102249,China;
    3.Postdoctoral Workstation,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;
    4.Lenovo (Beijing) Co.,Ltd.,Beijing 100085,China
  • Received:2017-10-08 Revised:2018-06-26 Online:2018-07-10 Published:2018-07-10

摘要: 通过岩心观察、试油资料分析、岩石薄片鉴定、CT三维成像与主控因子分析等技术手段,研究了鄂尔多斯盆地延长组7段(长7段)致密油的源—储组合特征,明确了致密油充注的主控因素。结果表明:鄂尔多斯盆地长7段发育源夹储、源—储互层与储夹源3种源—储岩性组合类型;不同源—储岩性组合内部发育薄层、中厚层与厚层3类烃源岩;构造裂缝、层理缝与微观孔喉网络为长7段主要的源—储通道。烃源岩厚度与源—储岩性组合是影响致密油充注的主要因素,源—储通道的影响相对较弱。厚层优质烃源岩是致密油充注的物理基础,剩余压力为致密油充注的主要动力,源—储岩性组合是致密油充注的空间场所。中厚层烃源岩与源夹储及源—储互层型岩性组合发育的区域为致密油有利的充注区。

关键词: 源—储组合, 主控因素, 致密油充注, 鄂尔多斯盆地

Abstract: Based on the core observation,oil production test,thin section identification,CT techniques and main controlling factor analysis,the source-reservoir association characteristics and controlling factors of tight oil in the 7thmember of Yanchang Formation(Chang 7 member) were analyzed and studied.The inclusions illustrate as followings:The source-reservoir lithological association of the Chang 7 member can be divided into three types,including reservoir rocks enclosed within source rocks,source-reservoir interbeds and source rocks enclosed within reservoir rocks.According to the thickness of source-rock,three main types can be classified as follows,which includes thin source rocks,medium thick source-rocks and thick source rocks.Channel between source and reservoir in tight sandstone reservoir has three types,including structure fissure,bedding fissure and pore-throat network system.The charging of tight oil is mainly controlled by hydrocarbon rock thickness and source-reservoir lithological association.The effect of channel between source and reservoir is relatively weak.High quality thick source rocks are the material basis for hydrocarbon charging,residual pressure is the major charging power,source-reservoir association is favorable charging location.The favorable charging area for tight oil is controlled by the distributions of medium-thick source-rock,reservoir rocks enclosed within source rocks and source-reservoir interbeds.

Key words: Source-reservoir association, Main controlling factors, Tight oil charging, Ordos Basin

中图分类号: 

  • TE122.1

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