Volume 42 Issue 4
Jul.  2025
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TENG Dayong, DING Qiuwei, JIN Xin, et al.Performance comparison and selection of a fracturing fluid suitable for high temperature offshore reservoirs[J]. Drilling Fluid & Completion Fluid，2025, 42（4）：546-553 doi: 10.12358/j.issn.1001-5620.2025.04.015
Citation: TENG Dayong, DING Qiuwei, JIN Xin, et al.Performance comparison and selection of a fracturing fluid suitable for high temperature offshore reservoirs[J]. Drilling Fluid & Completion Fluid，2025, 42（4）：546-553 doi: 10.12358/j.issn.1001-5620.2025.04.015
shu

Performance Comparison and Selection of a Fracturing Fluid Suitable for High Temperature Offshore Reservoirs

doi: 10.12358/j.issn.1001-5620.2025.04.015
  • 1.

    CNOOC EnerTech-Drilling & Production Co., Tianjin 300452

  • 2.

    CNOOC EnergyTechnology & Services Limited Key Laboratory for Exploration & Development of Unconventional Resources, Tianjin 300452

  • 3.

    CNOOC Energy Technology & Services Limited Key Laboratory for Enhanced Oil Recovery, Tianjin 300452

  • Received Date: 2025-01-09
  • Accepted Date: 2025-03-15
  • Rev Recd Date: 2025-03-09
  • Publish Date: 2025-07-31
    Abstract
  • Several special problems, such as narrow operation space, high reservoir temperature and formulation of fracturing fluids with seawater etc. exist in offshore fracturing operations and present special requirements for the performance of fracturing fluids. To deal with these problems, a high temperature seawater-based polymer fracturing fluid was developed and evaluated for its high temperature stability, shear resistance performance, viscoelasticity, shearing property at high rate of temperature variation, thixotropy, sand carrying capacity, static filtration property, gel breaking performance as well as the recycle of the flowback fluids etc. A comparative study was conducted with a guar gum fracturing fluid. Research shows that unlike the guar gum fracturing fluid, this high temperature seawater-based polymer fracturing fluid, when undergoing high-temperature shearing at 150℃, initially presents a linear gel state, by which the pumping friction in the well can be reduced. At elevated temperatures, this polymer fracturing fluid has better thickening capacity. When sheared at high temperatures, the structure of the polymer becomes more stable, thereby enhancing the sand carrying capacity of the fracturing fluid. After filtration and gel breaking, the amount of the residues left over is much lower than that of the guar gum fracturing fluid, imposing only slight formation damage. This polymer fracturing fluid can be formulated with simulated flowback fluid, its cost is 12.2% lower than that of the guar gum fluid, and is suitable for offshore fracturing operations.

     

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