Volume 35 Issue 5
Sep.  2018
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XIONG Zhengqiang, LI Xiaodong, FU Fan, LI Yanning. Mechanisms of Synthetic Hectorite to Viscosify Ultra-high Temperature Water Base Muds[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(5): 19-25. doi: 10.3969/j.issn.1001-5620.2018.05.004
Citation: XIONG Zhengqiang, LI Xiaodong, FU Fan, LI Yanning. Mechanisms of Synthetic Hectorite to Viscosify Ultra-high Temperature Water Base Muds[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(5): 19-25. doi: 10.3969/j.issn.1001-5620.2018.05.004
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Mechanisms of Synthetic Hectorite to Viscosify Ultra-high Temperature Water Base Muds

doi: 10.3969/j.issn.1001-5620.2018.05.004

  • Beijing Institute of Mineral Exploration Engineering, Beijing 100083

  • Received Date: 2018-05-23
  • Publish Date: 2018-09-30
    Abstract
  • Polymers are generally used for viscosifying water base drilling fluids, but their tolerance to high temperature is not suffcient to meet the requirements of ultra-high temperature water base drilling fluids. It is thus proposed that artifcial hectorite can be used as an ultra-high temperature viscosifer for water base drilling fluids. Characterization of the structure of the synthesized hectorite with X-ray powder diffraction and TGA showed that the synthesized hectorite, H-6, has excellent viscosifying property and thermal stability; it is able to function normally at temperature of up to 240℃, and its viscosifying effect at high temperature is superior to other high temperature viscosifers presently used worldwide. Testing of a 4% sodium-bentonite water base mud treated with 1% H-6 showed that after aging at 240℃ for 16 hours, the water base mud had the same apparent viscosity of 16.5 mPa·s, before and after aging. As a comparison, another 4% sodium-bentonite water base mud treated with 1% HE300, a high temperature viscosifer, had its viscosity reduced by at least 92% after aging at 240℃ for 16 hours. Laboratory study showed that H-6 is compatible well with other commonly used additives, and is suitable for use in water base drilling fluids as an ultra-high temperature viscosifer. It will fnd wide application in formulating ultra-high temperature water base drilling fluids.

     

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