Volume 36 Issue 3
Jun.  2019
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2019  >  36(3): 349-354
YU Yongjin, DING Zhiwei, ZHANG Chi, ZHANG Hua, GUO Jintang. A Cement Slurry Used at Ultra-high Circulation Temperature of 210℃[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(3): 349-354. doi: 10.3969/j.issn.1001-5620.2019.03.015
Citation: YU Yongjin, DING Zhiwei, ZHANG Chi, ZHANG Hua, GUO Jintang. A Cement Slurry Used at Ultra-high Circulation Temperature of 210℃[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(3): 349-354. doi: 10.3969/j.issn.1001-5620.2019.03.015
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A Cement Slurry Used at Ultra-high Circulation Temperature of 210℃

doi: 10.3969/j.issn.1001-5620.2019.03.015

  • 1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350;

  • 2. CNPC Engineering Technology R & D Company Limited, Beijing 102206

  • Received Date: 2019-01-14
  • Publish Date: 2019-06-30
    Abstract
  • To develop deep buried hydrocarbons, more and more ultra-deep and ultra-high temperature wells are drilled, imposing greater challenges to the thermal stability of cement slurry. To improve the high temperature stability of the cement slurries presently in use, a high temperature filter loss reducer DRF-1S, a high temperature retarder DRH-2L and other high temperature cement additives have been developed. A high temperature cement slurry with normal densities was formulated with these additives and was evaluated in laboratory. The laboratory evaluation results show that this cement slurry can be used at bottom hole circulation temperature of 210℃ and static bottom hole temperature of 230℃. The API filter loss of the cement slurry can be controlled to below 100 mL. The thickening time is adjustable. Differential density of the cement slurry at bottom and top is less than 0.04 g/cm3 at elevated temperatures. At ultra-high temperatures of 230℃-250℃, the set cement has a high strength that does not deteriorate with time. This cement slurry has been successfully used in cementing the φ127 mm liner string of the high temperature deep well Antan-4X drilled in the Block Yangshuiwu, Huabei Oilfield, and the excellent job quality of well cementing has provided a technical support for cementing exploratory wells in this area.

     

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