Volume 35 Issue 1
Jan.  2018
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LIU Tongyi, TANG Huang, CHEN Guangjie, DONG Guofeng, TANG Wenyue. Preparation and Evaluation of a Hydrophobic Cationic Guar Gum for Fracturing Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(1): 114-118. doi: 10.3969/j.issn.1001-5620.2018.01.022
Citation: LIU Tongyi, TANG Huang, CHEN Guangjie, DONG Guofeng, TANG Wenyue. Preparation and Evaluation of a Hydrophobic Cationic Guar Gum for Fracturing Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(1): 114-118. doi: 10.3969/j.issn.1001-5620.2018.01.022
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Preparation and Evaluation of a Hydrophobic Cationic Guar Gum for Fracturing Fluid

doi: 10.3969/j.issn.1001-5620.2018.01.022

  • 1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500;

  • 2. Chengdu Baichun Petroleum Technology Co. Ltd, Chengdu 610500

  • Received Date: 2017-09-14
  • Publish Date: 2018-01-30
    Abstract
  • A modified guar gum (CTGG) has been prepared to minimize formation damage caused by conventional guar gum fracturing fluids. CTGG was obtained through solvent method using guar gum as the raw material, CT1 (a long chain hydrophobic cationic monomer produced with N,N-Dimethyl dodecyl amine and epichlorohydrin) as etherizing agent, methanol as solvent, and sodium hydroxide as catalyst. Characterization of CTGG with IR spectroscopy showed that hydrophobic cationic group has been introduced into the molecular structure of CTGG which dissolved in 60 min. Water insoluble matters and residue were both less than conventional guar gum, The viscosity of CTGG is greater than GG and HPG at different concentrations. Other evaluation experiments indicated that gels formed by CTGG in water had viscosity of 300 mPa·s at 120℃. A fracturing fluid containing 0.35% CTGG (mass ratio) was resistant to shearing at 120℃, having viscosity of at least 67.4 mPa·s and residue of only 246.45 mg/L. These data demonstrate that CTGG has good solubility, thickening performance and temperature and shearing resistance, which are beneficial to protect reservoirs from being damaged.

     

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