Volume 37 Issue 6
Dec.  2020
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ZHANG Fuming, QI Ying, CHEN Xiaohua, MA Xiaokang, CUI Xinsen. A Well Cementing Slurry Used in Arctic Permafrost[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(6): 757-762. doi: 10.3969/j.issn.1001-5620.2020.06.014
Citation: ZHANG Fuming, QI Ying, CHEN Xiaohua, MA Xiaokang, CUI Xinsen. A Well Cementing Slurry Used in Arctic Permafrost[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(6): 757-762. doi: 10.3969/j.issn.1001-5620.2020.06.014

A Well Cementing Slurry Used in Arctic Permafrost

doi: 10.3969/j.issn.1001-5620.2020.06.014
  • Received Date: 2020-05-19
  • Publish Date: 2020-12-28
  • Petroleum exploration and development in the Arctic area in recent years has been accelerating. Well cementing operation in this area has long been facing with ultra-low temperature (-9 ℃) and the precious time available for operation; the cement slurry is required to have strength development in 24 hours at temperatures below zero. Using a self-developed low temperature gelling agent C-SE8 and a self-developed retarder H10S, several ultra-low temperature cement slurries were formulated with class G cement and other additives in fresh water, sea water and 14% NaCl solution. Evaluation of the cement slurries showed that a cement slurry of 1.50 g/cm3 had 24 h compressive strength of at least 3.6 MPa at -10 ℃; another cement slurry of 1.90 g/cm3 had 24 h compressive strength of at least 6.8 MPa at -10 ℃. The working temperatures of the cement slurries were between -10 ℃ and 30 ℃. The cement slurries had good rheology, and the thickening time can be easily adjusted, making them suitable for well cementing in arctic permafrost.

     

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