Volume 35 Issue 5
Sep.  2018
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WANG Jianyao, ZENG Jianguo, SUN Fuquan, WEI Zhousheng, XI Fangzhu. A Dispersion Resistant Flocculant used in Oil Well Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(5): 90-93. doi: 10.3969/j.issn.1001-5620.2018.05.017
Citation: WANG Jianyao, ZENG Jianguo, SUN Fuquan, WEI Zhousheng, XI Fangzhu. A Dispersion Resistant Flocculant used in Oil Well Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(5): 90-93. doi: 10.3969/j.issn.1001-5620.2018.05.017
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A Dispersion Resistant Flocculant used in Oil Well Cement Slurry

doi: 10.3969/j.issn.1001-5620.2018.05.017

  • 1. CPOE Boxing Engineering Technology Co., Ltd., Tianjin 300451;

  • 2. Department of Well Cementing Technology, CNPC Key Laboratory of Drilling Engineering, Tianjin 300451;

  • 3. Department of Well Cementing Technology, National Engineering Laboratory of Petroleum Drilling Technology, Tianjin 300451;

  • 4. CCDC ChangQing Well Cementing Company, Xi'an, 710000

  • Received Date: 2018-07-05
  • Publish Date: 2018-09-30
    Abstract
  • Frequent water invasion in water injection blocks in China gravely undermine the strength and bonding quality of set cement. A dispersion resistant flocculant BCY-100S has been developed to deal with these problems. BCY-100S is produced through radical polymerization and is used in preparing cement slurries for oil well cementing. The flocculating capacity and heat resistance of BCY- 100S were measured through zeta-potential analysis and TGA. The effects of BCY-100S on the performance of cement slurry to resist water invasion and on the thickening property of cement slurry were tested. It was found that BCY-100S functions normally at temperatures up to 324℃. Cement slurries treated with BCY-100S have to some flocculating ability. The BCY-100S treated cement slurries did not disperse or segregate when flushed with water at 80℃. Compared with cement slurries that were not treated with BCY- 100S, the cement slurries treated with BCY-100S were able to resist water flooding. BCY-100S does not affect the thickening time of cement slurry, which is a requirement of oil well cement property. Considering the effects of formation fluids on set cement, such as "migration after dissolution" and "mass interchange", the use of BCY-100S has provided a new method of resolving these problems.

     

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