Volume 36 Issue 1
Feb.  2019
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XU Liqun, ZHANG Xingguo, WANG Yindong, JIN Ye, DING Hui, LIU Zeng, LIU Kaiqiang, GUO Xiaoyang. Effect of Well Cementing at Low Return Flowrate on the Performance of Oil Well Cement Slurries[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(1): 70-76. doi: 10.3969/j.issn.1001-5620.2019.01.014
Citation: XU Liqun, ZHANG Xingguo, WANG Yindong, JIN Ye, DING Hui, LIU Zeng, LIU Kaiqiang, GUO Xiaoyang. Effect of Well Cementing at Low Return Flowrate on the Performance of Oil Well Cement Slurries[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(1): 70-76. doi: 10.3969/j.issn.1001-5620.2019.01.014

Effect of Well Cementing at Low Return Flowrate on the Performance of Oil Well Cement Slurries

doi: 10.3969/j.issn.1001-5620.2019.01.014
  • Received Date: 2018-11-25
  • Publish Date: 2019-02-28
  • During liner cementing in the fourth and fifth intervals of ultrahigh pressure gas wells drilled in the piedmont structure in Kuche county, Tarim basin, the hydration reaction speed of the cement is probably affected by its low return flowrate and slow temperature rise during pumping and displacement. To resolve this problem, laboratory study was conducted on the effect of low agitating speed resulted from low return flowrate on the performance of ultra-high-density cement slurries. The study result showed that at low return flowrate, the hydration reaction speed and the reaction process of a cement slurry become slow, resulting in great extension of the thickening time of the cement slurry, which in turn results in ultra-retarding of the top cement slurry in annular space. The suspension performance of the cement slurry was basically not affected by the low return flowrate, and to some extent, the low return flowrate even helped improve the suspension performance. The 14 d compressive strength of the set cement was slightly reduced, while the 28 d compressive strength of the set cement was basically not affected by the low return flowrate. The results of this study will provide a new theoretical basis and technical means to select cement slurry formulation for well cementing in similar conditions, minimize the amount of retarding agents required, make it easier to formulate cement slurry, and mitigate the ultra-retarding problem of the top cement in annular space.

     

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