Volume 32 Issue 2
Mar.  2015
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XIA Xiujian, GUO Jintang, YU Yongjin, JIN Jianzhou, LIU Shuoqiong, FENG Yakai. Study and Application of New High Temperature Retarder for Well Cementing[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 72-75. doi: 10.3969/j.issn.1001-5620.2015.02.019
Citation: XIA Xiujian, GUO Jintang, YU Yongjin, JIN Jianzhou, LIU Shuoqiong, FENG Yakai. Study and Application of New High Temperature Retarder for Well Cementing[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 72-75. doi: 10.3969/j.issn.1001-5620.2015.02.019
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Study and Application of New High Temperature Retarder for Well Cementing

doi: 10.3969/j.issn.1001-5620.2015.02.019

  • Block A34 of CNPC's Innovation Base in the West of Xishatun Bridge, Shahe Town, Changping District, Beijing 102206, China

  • Received Date: 2014-11-10
  • Publish Date: 2015-03-31
    Abstract
  • A new high temperature polymer retarder, GWH-1, was synthesized through free radical polymerization in water solution. GWH-1 was used to deal with the slow setting of the top cement in cementing long open hole with big temperature difference. Laboratory evaluation showed that GWH-1 can stand high temperature to 200℃, and was resistant to contamination from saturated salt solution. The thickening time of the cement slurry can be adjusted by changing the concentration of GWH-1. A low density (1.30 g/cm3) cement slurry treated with GWH-1 had thickening time of 386 min, after aging at 130℃. After aging at 30℃ for 72 h, the set cement had compressive strength of 3.5 MPa. No free liquid was found for the cement slurry at high temperature, and the density difference between the top and the bottom of the set cement was less than 0.02 g/cm3. GWH-1 was successfully used in the cementing job of well RP7008 in Tarim Basin.

     

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