Volume 34 Issue 6
Nov.  2017
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2017  >  34(6): 8-12,17
WANG Feilong, YANG Zexing, LIU Ze, QIU Xinming, Liu Feng, WANG Xinrui, LIU Jianqiong. Study on the Performance of SSMA-A Thinner Made Through Mass Polymerization[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 8-12,17. doi: 10.3969/j.issn.1001-5620.2017.06.002
Citation: WANG Feilong, YANG Zexing, LIU Ze, QIU Xinming, Liu Feng, WANG Xinrui, LIU Jianqiong. Study on the Performance of SSMA-A Thinner Made Through Mass Polymerization[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 8-12,17. doi: 10.3969/j.issn.1001-5620.2017.06.002
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Study on the Performance of SSMA-A Thinner Made Through Mass Polymerization

doi: 10.3969/j.issn.1001-5620.2017.06.002

  • 1. School of Chemical & Environmental Engineering, China University of Mining & Technology(Beijing), Beijing 100083;

  • 2. CNPC Drilling Research Institute, Beijing 102206;

  • 3. School of Petroleum Engineering, China University of Petroleum, Beijing 102249;

  • 4. NO.2 Drilling Engineering Company, BHDC Langfang, Hebei 065007

  • Received Date: 2017-10-09
  • Publish Date: 2017-11-30
    Abstract
  • Mass polymerization and solution polymerization were used to prepare styrene-maleic anhydride (SMA) with styrene (St) and maleic anhydride (MA). The two SMAs made were then sulfonated to sulfonated styrene-maleic anhydride (SSMA). SSMAs made from the two methods were evaluated for their abilities in drilling fluids to reduce viscosity and to resist the effects of high temperature and salt contamination. It was found that the two SSMAs made both can effectively tear apart the spatial networking structure formed by the clay particles in the drilling fluid. In saltwater muds and at high temperatures, the two SSMAs performed differently in viscosity reduction. First, in fresh water base drilling fluids, the two SSMAs both can reduce mud viscosity efficiently. At a concentration of 0.75%, the SSMA made through mass polymerization can reduce the viscosity by 95.38%, while the SSMA made through solution polymerization can reduce the viscosity by 85.54%. Second, in saltwater drilling fluids, the SSMA made through mass polymerization had better viscosity reduction ability and better salt resistance. At a concentration of 1%, the viscosity of saltwater drilling fluids can be reduced by 53.33% by the SSAM made through mass polymerization. Third, in aging experiments at elevated temperatures, the viscosity reducing performance of the SSMA made through mass polymerization was less affected by temperature than that of the SSMA made through solution polymerization. After aging at 230℃, the rate of viscosity reduction (by the SSMA made through mass polymerization) was still maintained at 40% or higher. Fourth, in high density drilling fluids, SSAM made through mass polymerization had higher rate of viscosity reduction. After aging at 220℃, the rate of viscosity reduction was still maintained at 60% or higher, higher than the rate of viscosity reduction of SSMA made through solution polymerization, which was 47.45% in high density drilling fluids.

     

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