石油勘探与开发 >

2017 , Vol. 44 >Issue 2: 270 - 274

DOI: https://doi.org/10.11698/PED.2017.02.12

油气田开发

聚合物-弱凝胶调驱核磁共振可视化实验

  • 狄勤丰 ,
  • 张景楠 ,
  • 华帅 ,
  • 陈会娟 ,
  • 顾春元
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  • 1. 上海大学上海市应用数学和力学研究所,上海 200072;
    2. 上海市力学在能源工程中的应用重点实验室,上海 200072
狄勤丰（1963-）,男,江苏溧阳人,博士,上海大学教授,主要从事石油工程力学问题的研究。地址：上海市延长路149号,上海大学上海市应用数学和力学研究所,邮政编码：200072。E-mail: qinfengd@sina.com

收稿日期: 2016-07-25

  修回日期: 2017-01-16

  网络出版日期: 2017-05-22

基金资助

国家自然科学基金（50874071; 51274136）; 上海市重点学科建设项目（S30106）; 国家高技术研究发展计划（863）项目（2008AA06Z201）; 上海市教育委员会高峰学科建设项目

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Visualization experiments on polymer-weak gel profile control and displacement by NMR technique

  • DI Qinfeng ,
  • ZHANG Jingnan ,
  • HUA Shuai ,
  • CHEN Huijuan ,
  • GU Chunyuan
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  • 1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
    2. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, China

Received date: 2016-07-25

  Revised date: 2017-01-16

  Online published: 2017-05-22

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摘要

将核磁共振可视化技术和岩心驱替实验相结合,观察了弱凝胶在岩心中的分布特征和运移规律,对不同聚合物-弱凝胶组合方式下的驱油特征进行可视化实验研究。将聚合物和弱凝胶进行组合,设计了3种组合方式：水驱+聚合物驱（方式1）,水驱+聚合物驱+弱凝胶驱（方式2）,水驱+弱凝胶驱+聚合物驱（方式3）。对不同组合方式在驱替过程中的压力变化、T2谱特征、核磁共振图像、驱油效率进行了研究。研究表明,核磁共振图像可直观表征弱凝胶在岩心中的形态分布及运移特征,也可反映出残余油的分布特征;T2谱特征表明聚合物和弱凝胶均具有调剖和驱油作用,组合方式2的调剖效果最明显;3种组合方式中,组合方式2的驱油效率最大,为78.84%,比初次水驱提高了18.33%。图7表4参16

关键词： 弱凝胶; 聚合物; 核磁共振; 可视化驱替实验; 驱油效率

本文引用格式

狄勤丰 , 张景楠 , 华帅 , 陈会娟 , 顾春元 . 聚合物-弱凝胶调驱核磁共振可视化实验[J]. 石油勘探与开发, 2017 , 44(2) : 270 -274 . DOI: 10.11698/PED.2017.02.12

Abstract

The distribution characteristics and migration pattern of weak gel in the core were observed by combining nuclear magnetic resonance (NMR) imaging technology with the core displacement experiment, and the oil displacement features of different polymer-weak gel combinations were examined with visualization experiments. Three combination patterns of polymer and weak gel were designed: waterflooding+ polymer flooding (pattern 1), waterflooding + polymer flooding + weak gel flooding (pattern 2), and waterflooding + weak gel flooding + polymer flooding (pattern 3). The pressure variations, T2 spectra, nuclear magnetic resonance images, oil displacement efficiencies under the different patterns were analyzed. The results show that the nuclear magnetic images can not only provide the direct information of weak gel distribution and migration characteristics inside the core, but also reflect the distribution characteristics of remaining oil; the T2 spectrum characteristics indicate that both polymer and weak gel have the function of profile control and oil displacement, and the pattern 2 has the best profile control effect; of the three patterns, pattern 2 has the highest oil displacement efficiency of 78.84%, which is 18.33% higher than the displacement efficiency of water flooding in the initial stage.

Key words： weak gel; polymer; nuclear magnetic resonance (NMR); visualization displacement experiment; oil displacement efficiency

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