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This study investigated the effects of using xanthan gum, guar gum, CMC, MV-CMC, and HV-CMC as protective agents, mixing clean fracturing flowback fluid with drilling fluid base slurry. The optimal protective agents and formulations were selected. The best ratios for xanthan gum, guar gum, CMC, and HV-CMC were 3:1, 2:1, 4:1, and 4:1, respectively. The optimal formulations are: 1.0% modified gum powder with 0.10% xanthan gum; 1.0% modified gum powder with 0.20% guar gum; 1.0% modified gum powder with 0.20% CMC; and 1.0% modified gum powder with 0.25% HV-CMC, all combined with modified plant phenol-polymeric aluminum chloride. Experiments showed these agents effectively inhibited the hydration and expansion of bentonite, with CMC performing best at 30℃ (expansion rate of 7.71%) and HV-CMC performing best at 90℃ (expansion rate of 20.66%). The quaternary ammonium salt long-chain molecules in the clean fracturing flowback fluid adsorb on the clay surface, effectively inhibiting expansion.

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Research and Performance Evaluation of Formulations for Drilling Fluids Prepared from Clean Fracturing Flowback Fluid

  • 会议论文

  • 发表日期：

    2026年

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  • Yunyue Zhang,
  • Chun Hui,
  • Xinxin Song,
  • Junhao Li

摘要

This study investigated the effects of using xanthan gum, guar gum, CMC, MV-CMC, and HV-CMC as protective agents, mixing clean fracturing flowback fluid with drilling fluid base slurry. The optimal protective agents and formulations were selected. The best ratios for xanthan gum, guar gum, CMC, and HV-CMC were 3:1, 2:1, 4:1, and 4:1, respectively. The optimal formulations are: 1.0% modified gum powder with 0.10% xanthan gum; 1.0% modified gum powder with 0.20% guar gum; 1.0% modified gum powder with 0.20% CMC; and 1.0% modified gum powder with 0.25% HV-CMC, all combined with modified plant phenol-polymeric aluminum chloride. Experiments showed these agents effectively inhibited the hydration and expansion of bentonite, with CMC performing best at 30℃ (expansion rate of 7.71%) and HV-CMC performing best at 90℃ (expansion rate of 20.66%). The quaternary ammonium salt long-chain molecules in the clean fracturing flowback fluid adsorb on the clay surface, effectively inhibiting expansion.