Volume 36 Issue 4
Aug.  2019
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GUO Yongbin, LI Zhong, LIU Hexing, DONG Zhao, WU Zhiming, MA Chuanhua. Development of a Low Temperature Early Strength Cement Slurry with Low Exothermic Heat of Hydration[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(4): 500-505. doi: 10.3969/j.issn.1001-5620.2019.04.019
Citation: GUO Yongbin, LI Zhong, LIU Hexing, DONG Zhao, WU Zhiming, MA Chuanhua. Development of a Low Temperature Early Strength Cement Slurry with Low Exothermic Heat of Hydration[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(4): 500-505. doi: 10.3969/j.issn.1001-5620.2019.04.019
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Development of a Low Temperature Early Strength Cement Slurry with Low Exothermic Heat of Hydration

doi: 10.3969/j.issn.1001-5620.2019.04.019

  • 1. Zhanjiang Branch of CNOOC, Zhanjiang, Guangdong 524057;

  • 2. Zhanjiang Branch of CNOOC Energy Technology & Services Limited, Zhanjiang, Guangdong 524057

  • Received Date: 2019-03-17
  • Publish Date: 2019-08-30
    Abstract
  • In deep water drilling, special environment in formations containing hydrate-forming chemicals requires the cement slurry to have low exothermic heat of hydration and early strength at low temperatures. Most of the cement slurries presently in use do not have the low exothermic heat of hydration characteristics and the rate of low temperature hydration reaction is slow. A study plan has been presented to resolve these problems. The study has aimed at finding a cement slurry with low temperature early strength and low exothermic heat of hydration. This cement slurry is formulated with a mixture of aluminate cement and class G cement in a mass ratio of 1:1 followed by the treatment of other additives such as energy-storing micro spheres, light-weight agent, stabilizer and so on in carefully determined concentrations. The early strength additive used is triethanolamine at 0.06%, the filter loss reducer is 1% CML, a polyvinyl alcohol base filter loss reducer, the retarder is boric acid at 0.35%, and the dispersant is 1.5% SYJZ-1. Performance test of the cement slurry shows that after aging for 24 h at 4℃ the compressive strength of the set cement is 5.9 MPa. It can be found that this cement slurry has excellent early strength, low exothermic heat of hydration and density characteristics.

     

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