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一种物理凝胶压裂液的耐温耐剪切评价与机理分析

蒋其辉,  杨向同,  王永红,  李会丽,  宁坤

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文章导航 > 钻井液与完井液  > 2020 >  37(4): 526-531
蒋其辉, 杨向同, 王永红, 李会丽, 宁坤. 一种物理凝胶压裂液的耐温耐剪切评价与机理分析[J]. 钻井液与完井液, 2020, 37(4): 526-531. doi: 10.3969/j.issn.1001-5620.2020.04.020
引用本文: 蒋其辉, 杨向同, 王永红, 李会丽, 宁坤. 一种物理凝胶压裂液的耐温耐剪切评价与机理分析[J]. 钻井液与完井液, 2020, 37(4): 526-531. doi: 10.3969/j.issn.1001-5620.2020.04.020
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JANG Qihui, YANG Xiangtong, WANG Yonghong, LI Huili, Ning Kun. The Temperature-tolerance and Shear-resistance Mechanism of a Physical Gel Fracturing Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 526-531. doi: 10.3969/j.issn.1001-5620.2020.04.020
Citation: JANG Qihui, YANG Xiangtong, WANG Yonghong, LI Huili, Ning Kun. The Temperature-tolerance and Shear-resistance Mechanism of a Physical Gel Fracturing Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 526-531. doi: 10.3969/j.issn.1001-5620.2020.04.020
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一种物理凝胶压裂液的耐温耐剪切评价与机理分析

doi: 10.3969/j.issn.1001-5620.2020.04.020

  • 中国石油集团工程技术研究院有限公司井下作业研究所, 北京 102206

基金项目: 

中国石油集团工程技术研究院有限公司院所青年基金课题“中高温低伤害减摩压裂液的研制”（CPETQ201929）部分研究成果

详细信息
    作者简介:

    蒋其辉,1986年生,博士,主要从事油气藏增产改造工作液及关键技术领域研究。电话17701303893,E-mail:jiangqihuidri@cnpc.com.cn

  • 中图分类号: TE357.12

The Temperature-tolerance and Shear-resistance Mechanism of a Physical Gel Fracturing Fluid

  • Downhole Operation Research Department, CNPC Engineering Technology R&D Company Limited, Beijing 102206

    摘要
  • 摘要: 研究了一种物理凝胶压裂液的耐温耐剪切机理，主要分为以下3个方面：使用透射电镜分析了溶液微观结构，解释了线性型高聚物（HPAM）和聚合物稠化剂（SMPT）在高剪切速率下的降解现象；通过测试耐温耐剪切实验前后样品的黏弹模量，对比分析了HPAM和SMPT耐温耐剪切降解的影响因素；通过测试物理凝胶0.6% HPAM+0.5% PHCA与0.6% SMPT+0.5% PHCA耐温耐剪切实验前后样品的黏弹模量与微观形貌，分析了物理凝胶耐温耐剪切降解的影响因素。实验结果显示，经过120℃，170 s-1的耐温耐剪切实验，物理凝胶0.6% HPAM+0.5% PHCA转变为黏性流体；相反，经过150℃的耐温耐剪切实验，物理凝胶0.6% SMPT+0.5% PHCA的弹性因子保持率为78.9%，说明该物理凝胶压裂液经受高温剪切可保持强弹性流体特征。阿伦尼乌斯方程η=A e（－Ea/RT）活化能计算结果表明，PHCA可以降低SMPT溶液的活化能获得高稳定性流体，表明PHCA增强了SMPT溶液的结构稳定性。

     

    Abstract: This paper focuses on the Temperature-tolerance and Shear-resistance mechanism of a physical gel fracturing fluid, which is mainly divided into the following three aspects: (1)The microstructure of the solution is analyzed using a transmission electron microscope, and shear degradation phenomenon of the linear polymer (HPAM) and thickener (SMPT) is explained. (2)The influence factors of Temperature-tolerance and Shear-resistance of HPAM and SMPT are compared and analyzed through testing the viscoelastic modulus of samples before and after the Temperature-tolerance and Shear-resistance test. (3)The Factors of Temperature-tolerance and Shear-resistance Degradation of the physical gel was analyzed by the viscoelastic modulus and micromorphology of the samples before and after the Temperature-tolerance and Shear-resistance test of 0.6% HPAM + 0.5% PHCA and 0.6% SMPT + 0.5% PHCA. The result shows that sample of 0.6% HPAM + 0.5% PHCA undergoes shear degradation and transforms into a viscous fluid after the Temperature-tolerance and Shear-resistance test under the condition of 120 ℃, 170s-1 for 2 hours. Extraordinarily, the elastic factor retention rate of the physical gel (0.8% SMPT+0.5%PHCA) is 78.9% , indicating that the physical gel fracturing fluid can maintain strong elastic fluid characteristics undergo the Temperature-tolerance and shear-resistance test at 150℃. Activation energy data of Arrhenius equation η= A e(－ Ea/RT) shows that PHCA can lower the activation energy and constraining the degradation of SMPT, which indicates that PHCA is able to enhance the structural stability of SMPT solution.

     

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出版历程
  • 收稿日期:  2020-03-10
  • 刊出日期:  2020-08-28

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