4/4/2025, 10:53:03 AM 星期五
Exploratory research on high-density drilling fluids with 240℃ ultra-high temperature resistance
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Beijing Institute of Exploration Engineering, Beijing 100083, China

Clc Number:

P634.6;TE254

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    Abstract:

    With the implementation of deep oil and gas exploration, high temperature hot dry rock exploration and deep earth exploration strategy, the drilling fluids have been in high temperature and high-pressure environment for a long time, and the stability of water-based drilling fluids under ultra-high temperature and high pressure is a key technology for ultra-high temperature well drilling. In this paper, the technical problems faced by drilling fluids in ultra-high temperature scientific drilling engineering are analyzed, and the design approach for high density water-based drilling fluids formula resistant to 240℃ ultra-high temperature are proposed. The key additives for 240℃ ultra-high temperature and high density water-based drilling fluids were selected by single factor method. Using the synergistic effect of different high temperature additives, a set of ultra-high temperature and high density water-based drilling fluid formula with temperature resistance of 240℃ and density of 2.0g/cm3 was preliminarily developed. The results show that after aging at 240℃ for 16h, the optimal formulation of drilling fluids have good rheology and filtration reduction performance. Its apparent viscosity change rate is less than 30%, and the filtration loss at 180℃ is less than 24mL.

    Reference
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History
  • Received:May 10,2024
  • Revised:June 26,2024
  • Adopted:June 27,2024
  • Online: August 02,2024
  • Published: July 10,2024
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