Volume 32 Issue 4
May  2015
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XU Weixiang, WANG Chengwen, LIU Wei, LI Fei, MENG Fanchang. A New High Temperature Low Density Cement Slurry with Fly Ash[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(4): 55-58. doi: 10.3969/j.issn.1001-5620.2015.04.015
Citation: XU Weixiang, WANG Chengwen, LIU Wei, LI Fei, MENG Fanchang. A New High Temperature Low Density Cement Slurry with Fly Ash[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(4): 55-58. doi: 10.3969/j.issn.1001-5620.2015.04.015

A New High Temperature Low Density Cement Slurry with Fly Ash

doi: 10.3969/j.issn.1001-5620.2015.04.015
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  • Corresponding author: 王成文,电话15264259168
  • Received Date: 2015-01-29
  • Publish Date: 2015-07-31
  • The effect of the concentration of fly ash and micro silicon powder on the compressive strength of set cement at middle and high temperatures was studied. At elevated temperatures (≥125 ℃), micro silicon powder (used as stabilizer in cement slurry) hindered the normal increasing of the compressive strength of the fly ash cement slurry. A new high temperature enhancer was developed for use in low density fly ash cement slurry to maintain its high temperature stability and to solve the abnormal development of the strength of the said cement slurry. Using this enhancer, cement slurries having density of 1.50-1.60 g/cm3 were developed. These slurries had good sedimentation stability, low filter loss, changeable thickening time, high compressive strength of set cement, and good compressive strength development at the top of cement slurry column. The static gel strength of the cement slurry had transition time of 18 min at 130 ℃, satisfying the needs for well cementing at higher differential temperatures, such as 85-130 ℃.

     

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