Volume 34 Issue 4
Jul.  2017
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GENG Jianwei. Study and Application of Low Temperature Early Strength Low Density Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(4): 65-68. doi: 10.3969/j.issn.1001-5620.2017.04.012
Citation: GENG Jianwei. Study and Application of Low Temperature Early Strength Low Density Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(4): 65-68. doi: 10.3969/j.issn.1001-5620.2017.04.012

Study and Application of Low Temperature Early Strength Low Density Cement Slurry

doi: 10.3969/j.issn.1001-5620.2017.04.012
  • Received Date: 2017-04-27
  • Publish Date: 2017-07-31
  • The early strength of conventional low density cement slurries developed very slowly at low temperature, and the poor cementing ability of these slurries negatively affect the quality of well cementing. In shallow wells with frequent mud losses, this problem is quite common. To resolve this problem, studies have been conducted on low temperature early strength low density cement slurry. Based on the close packing theory and laboratory experimental study, low temperature early strength low density (1.30-1.50 g/cm3) cement slurries were developed. Ultra-fine gelled material and an early strength agent made by compounding lithium salts were used to improve the soundness and early strength of the low density set cement. The setting time of the low density cement slurry at 25℃ is 13 h, and the 24 h strength is 10.2 MPa. This low density cement slurry has high early strength at low temperatures, short setting time and good stability. It has been used on 2 wells in Daqing Oilfield with great success, and the well cementing jobs were 100% qualified.

     

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