The tight gas reservoir in the western margin of Ordos Basin has deep burial and high temperature, the existing technology slippery water system has the problems of poor temperature resistance and the water quality is highly mineralized. In this paper, acrylic acid (AA), acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), 4-acrylyl morpholine are used (ACMO), synthesized a low viscosity and temperature resistant slickwater fracturing system-FVS by reverse microemulsion polymerization. The performance evaluation results showed that: The maximum temperature resistance of the slickwater fracturing system FVS is 142 °C; the apparent viscosity is 54.47 mPa s after shearing at 120 °C for 1 h; At 0.1–0.4% concentration, the drag reduction rate is greater than 70%. The fracturing fluid FVS has low damage to the reservoir. Field application results show that the slickwater fracturing system FVS has stable performance and enhanced the reservoir stimulation.

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Research and Application of Recoverable Slickwater Fracturing System in Deep Tight Gas Reservoirs

  • Le-kai Hou,
  • Yong-gang Xie,
  • Li Ding,
  • Chang-jing Zhou,
  • Hua-qiang Shi,
  • Xiao-ling Li

摘要

The tight gas reservoir in the western margin of Ordos Basin has deep burial and high temperature, the existing technology slippery water system has the problems of poor temperature resistance and the water quality is highly mineralized. In this paper, acrylic acid (AA), acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), 4-acrylyl morpholine are used (ACMO), synthesized a low viscosity and temperature resistant slickwater fracturing system-FVS by reverse microemulsion polymerization. The performance evaluation results showed that: The maximum temperature resistance of the slickwater fracturing system FVS is 142 °C; the apparent viscosity is 54.47 mPa s after shearing at 120 °C for 1 h; At 0.1–0.4% concentration, the drag reduction rate is greater than 70%. The fracturing fluid FVS has low damage to the reservoir. Field application results show that the slickwater fracturing system FVS has stable performance and enhanced the reservoir stimulation.