Volume 34 Issue 5
Sep.  2017
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LYU Bin, ZHANG Shande, WU Guangxing, LIU Xin, SHI Zhongnan, CHEN Xiaolou. Study on New Oil Well Cement Retarder Able to Inhibit Abnormal Thickening of Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(5): 67-72. doi: 10.3969/j.issn.1001-5620.2017.05.013
Citation: LYU Bin, ZHANG Shande, WU Guangxing, LIU Xin, SHI Zhongnan, CHEN Xiaolou. Study on New Oil Well Cement Retarder Able to Inhibit Abnormal Thickening of Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(5): 67-72. doi: 10.3969/j.issn.1001-5620.2017.05.013

Study on New Oil Well Cement Retarder Able to Inhibit Abnormal Thickening of Cement Slurry

doi: 10.3969/j.issn.1001-5620.2017.05.013
  • Received Date: 2017-06-22
  • Publish Date: 2017-09-30
  • Oil well cement slurries treated with retarders presently in use experience abnormal gelation between 90℃ and 150℃; in their gelation curves appear "bulge" and "shoulder". A highly inhibitive branched polymer retarder DR150 has been developed through graft copolymerization to address this problem. Laboratory evaluation o indicated that cement slurries treated with DR150 had these characteristics between 90℃ and 150℃, such as, low initial consistency, thickening time that was adjustable, short transition time, low sensitivity to changes in temperature and concentration of DR150, and being free of high temperature reversal and retarding time that is too long. DR150, having good overall properties, is also able to inhibit other abnormal gelation phenomena. The application of DR150 in the Block Xujiaweizi in Daqing Oilfield has gained success; high quality well cementing job was achieved. DR150 is highly valuable in securing the achievement acquired in unconventional hydrocarbon and deeply buried gas exploration and development, and in improving the job quality of deep well/ultra-deep well cementing.

     

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