地学前缘 ›› 2012, Vol. 19 ›› Issue (2): 171-175.

• 论文 • 上一篇    下一篇

影响低渗透油藏注水开发效果的因素及改善措施

 李志鹏, 林承焰, 董波, 卜丽侠, 崔玲   


  1. 1. 中国石油大学（华东） 地球科学与技术学院， 山东 东营 257061 2. 中国石油 新疆油田公司 百口泉采油厂， 新疆 克拉玛依 834000 3. 中国石化 胜利油田 东辛采油厂， 山东 东营 257061
  • 收稿日期:2012-01-20 修回日期:2012-02-18 出版日期:2012-03-25 发布日期:2012-03-25
  • 作者简介:李志鹏(1983—)，男，博士研究生，油气成藏规律和油气田开发方向。E-mail：lizhipeng20020015@126.com
  • 基金资助:

    国家科技重大专项课题项目（2009ZX05009003）

1. School of Geosciences, China University of Petroleum (East China), Dongying 257061, China 2. The Baikouquan Oil Extraction Plant of Karamay Oilfield, Karamay 834000, China 3. Dongxin Oil Extraction Plant in Shengli Oilfield, Dongying 257061, China

 LI  Zhi-Feng, LIN  Cheng-Yan, DONG  Bei, BO  Li-Xia, CUI  Ling   

  1. 1. School of Geosciences, China University of Petroleum (East China), Dongying 257061, China 2. The Baikouquan Oil Extraction Plant of Karamay Oilfield, Karamay 834000, China 3. Dongxin Oil Extraction Plant in Shengli Oilfield, Dongying 257061, China
  • Received:2012-01-20 Revised:2012-02-18 Online:2012-03-25 Published:2012-03-25

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摘要：

在单砂体划分和内部结构研究的基础上，运用地质因素与生产相结合的手段，研究了影响低渗油藏注水开发效果的因素，发现影响低渗油藏开发效果的地质因素主要有3个：（1）孔隙结构特征。一般孔隙结构越复杂，孔径越小，开发效果越差。（2）砂体内部构型。砂体建筑结构越复杂，开发效果越差。（3）夹层频率的影响。适量的夹层提高厚油层的开发效果，而过量的夹层，则降低开发效果。除地质因素以外，还分析了渗流特点、贾敏效应以及压敏效应等开发因素对低渗透油藏开发效果的影响。启动压力梯度越大，开发效果越差；贾敏效应降低开发效果；压敏效应越严重，开发效果越差。针对以上影响因素提出了5种改善低渗透油藏开发效果的措施：以小层为单位按单砂体合注合采、水平井开发、适当放大生产压差、尽量减小井距以及早期注水。

关键词: 低渗透, 建筑结构, 注水开发, 开发效果

Abstract:


Abstract: On the basis of classification and interarchitecture of monosandbody, studies on the influencing factors of the water flood development of low permeability reservoirs were carried out with the combination of geological factors and productions. There are three major geological factors which affect the water flood effect of low permeability reservoir. The first is pore structure. The more complex the pore structure and the smaller the pore diameter, the worse the development effect of low permeability reservoir. The second is interarchitecture of monosandbody. The more complex, the worse the development effect. The third is the frequency of thin interbeds. Moderate thin interbeds improve production effect, but excessive interbeds will decrease the development effects. At the same time, development factors such as the flow characteristics, the Jamin effect and the pressuresensitive effect are also analyzed to see the the development effect of low permeability reservoir. The greater the initial pressure gradient, the worse the development effect. Jamin effect decreases the development effect. The more serious the pressuresensitive effect, the worse the development effect. In view of the above influencing factors, we propose five measures to improve the development effect including the commingled injection and production by monosandbody in small layer, horizontal well development, moderately enlarging production pressure, narrowing well spacing as far as possible and early water flooding.

 

Key words:  low permeability, architecture, water flooding, development effect

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