岩性油气藏 ›› 2018, Vol. 30 ›› Issue (5): 91–102.doi: 10.12108/yxyqc.20180511

• 油气田开发 • 上一篇    下一篇

砂砾岩储层孔隙结构模态控制下的剩余油分布——以克拉玛依油田七东1区克下组为例

印森林1, 陈恭洋1, 陈玉琨2, 吴小军2   

  1. 1. 长江大学 录井技术与工程研究院, 湖北 荆州 434023;
    2. 中国石油新疆油田分公司勘探开发研究院, 新疆 克拉玛依 834000
  • 收稿日期:2018-02-24 修回日期:2018-05-25 出版日期:2018-09-14 发布日期:2018-09-14
  • 第一作者:印森林(1983-),男,博士,副教授,主要从事油气田开发地质的教学和科研工作。地址:(434023)湖北省荆州市南环路1号长江大学录井技术与工程研究院。Email:252499306@qq.com
  • 通信作者: 陈恭洋(1963-),男,博士,教授,博士生导师,主要从事石油地质及录井地质的教学和科研工作。Email:gychen8888@126.com。
  • 基金资助:
    国家自然科学基金项目“冲积扇储层孔隙结构复杂模态成因机制及其分布模式”（编号：41502126）、国家重大科技专项“我国含油气盆地深层油气分布规律与资源评价”（编号：2017ZX05008-006-004-002）和长江大学青年基金项目“冲积扇储层孔隙结构复杂模态成因机制”（编号：2015cqn55）联合资助

Control effect of pore structure modality on remaining oil in glutenite reservoir: a case from lower Karamay Formation in block Qidong 1 of Karamay Oilfield

YIN Senlin1, CHEN Gongyang1, CHEN Yukun2, WU Xiaojun2   

  1. 1. Institute of Mud Logging Technology and Engineering, Yangtze University, Jingzhou 434023, Hubei, China;
    2. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2018-02-24 Revised:2018-05-25 Online:2018-09-14 Published:2018-09-14

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摘要： 为阐明砂砾岩储层复杂孔隙结构模态对微观剩余油的控制作用，在325块分析样品实验数据基础上，利用针对砂砾岩大颗粒的大铸体薄片分析、核磁共振复杂孔隙结构表征及CT三维立体孔隙空间扫描等技术，研究水驱/聚驱条件下砂砾岩复杂孔隙结构模态对剩余油的控制作用。结果表明：①水驱剩余油分布规律比较明显。水驱时含油饱和度在50%～100%所占频率下降快，优先被动用；②聚驱中后期，聚合物堵塞了部分水驱阶段形成的水流优势通道，形成活塞式的驱动导致含油饱和度在37.5%～50.0%被大量动用。聚驱后剩余油以孤立状分布为主，局部存在连片状；③不同孔隙结构模态在水驱/聚驱剩余油中差异较大。单模态、双模态岩心驱油效率较高，其中聚合物提高驱油效率为9.30%～18.38%。单模态岩心水驱油效率较高，而双模态和复模态岩心水驱油效率相当。聚合物提高驱油效率以双模态岩心最高，单模态次之。单模态和双模态岩心注入聚合物后，含水率下降可达20%。

关键词: 复模态, 砂砾岩, 聚合物驱替, 剩余油, 冲积扇, 克拉玛依油田

Abstract: The control effect of complex pore structure of glutenite reservoirs on remaining oil is very complicated and not clear. In this paper,based on the analysis data of 325 experimental samples,the control effect of complex pore structure modality on residual oil in water/polymer flooding is examined by means of large casting thin section,nuclear magnetic complex pore structure resonance and CT three-dimensional pore structure scanning. The results show that:(1) The distribution of remaining oil in water/polymer flooding follows some obvious patterns. The reservoirs with oil saturation in the range of 50% to 100% are displaced first, seeing quick decline in proportion.(2) In the middle and late stages of polymer flooding,some of the fluid advantage channels formed at the stage of water flooding, and the piston-type drive results in a large part of reservoirs with oil saturation in the range of 37.5% to 50.0% to be produced;the remaining oil is mainly in isolated distribution, and only in connected pieces in local parts.(3)Different pore structure modalities result in quite different oil displacement effects in water flooding/polymer flooding. The flooding efficiency in cores with single modality and dual modalities is higher,and the oil displacement efficiency of polymer is 9.30% to 18.38% after water flooding. Water flooding efficiency of single-modality core is the highest,while water flooding efficiencies of the dual-modality and complex modality cores are similar. The displacement efficiency with polymer is the highest in dual-modality cores, followed by single modality cores. The water content decreases by 20% after the cores with single-modality and dual-modality are injected with polymer.

Key words: complex modality, glutenite, polymer flooding, remaining oil, alluvial fan, Karamay Oilfield

中图分类号: 

  • TE122
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