Volume 39 Issue 1
May  2022
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2022  >  39(1): 107-113
YAN Jie, ZHANG Han, GUO Zhijie, et al.Preparation of a high molecular weight polymer thickening agent and its use in fracturing fluids[J]. Drilling Fluid & Completion Fluid，2022, 39（1）：107-113 doi: 10.12358/j.issn.1001-5620.2022.01.018
Citation: YAN Jie, ZHANG Han, GUO Zhijie, et al.Preparation of a high molecular weight polymer thickening agent and its use in fracturing fluids[J]. Drilling Fluid & Completion Fluid，2022, 39（1）：107-113 doi: 10.12358/j.issn.1001-5620.2022.01.018
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Preparation of a High Molecular Weight Polymer Thickening Agent and Its Use in Fracturing Fluids

doi: 10.12358/j.issn.1001-5620.2022.01.018
  • 1.

    Engineering and Technology Branch ,CNPC Xibu Drilling Engineering Company Limited, Xi’an, Shaanxi 830011

  • 2.

    CNPC Huabei Oilfield Company, Renqiu, Heibei 062552

  • 3.

    CNPC Bohai Drilling Downhole Operation Branch Company, Renqiu, Hebei 065007

  • 4.

    School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an, Shaanxi 710048

  • Received Date: 2021-09-25
  • Accepted Date: 2021-12-01
  • Rev Recd Date: 2021-11-01
  • Publish Date: 2022-05-06
    Abstract
  • A high molecular weight polymer thickening agent, FTW-1, for fracturing fluids has been developed through water solution polymerization using 2-acrylamido-2-methylpropane sulfonic acid (AMPS), acrylamide (AM), sodium p-styrenesulfonate (SSS) and dimethyl diallyl ammonium chloride (DMDAAC) as polymerization monomers. Several factors, such as the reaction temperature, the pH of the reaction system, reaction time, concentrations of monomers, as well as the concentration of the initiator, were studied for their effects on the performance of FTW-1. The molecular structure of FTW-1 was characterized with FTIR, TG etc. It was found that the optimum conditions for the polymerization reaction are as follows: the mass concentration of the monomers = 35%, the pH of the reaction system = 7.8-8.0, the concentration of the initiator = 0.12%, the reaction temperature = 50 ℃, and the reaction time = 4 h. FTIR and TG analyses showed that the molecular structure of the reaction product FTW-1 meets the expectations. The viscosity average molecular weight of FTW-1 is 1.8 × 106. FTW-1 has good thermal stability; it satisfies the need of operation at 180 ℃. Studies on the performance of the FTW-1 treated fracturing fluids showed that the solubility, thickening and crosslinking performance, high temperature and shearing resistance, resistance to biodegradation, as well as gel breaking capacity of FTW-1 all meet the requirements of relevant industrial standards.

     

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