西南石油大学学报(自然科学版)

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Experimental Study on Factors Affecting the Effect of Barium Sulfate
Scale Inhibition

Li Hongjian1, Meng Xue1, Li Ran1, Tang Xin2, Wang Deyu2   

  1. 1. School of Petroleum and Natural Gas Engineering，Southwest Petroleum University，Chengdu，Sichuan 610500，China
    2. No.6 Recovery Plant of Changqing Oilfield Company，PetroChina，Xi’an，Shaanxi 710018，China
  • Online:2014-02-01 Published:2014-02-01

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Abstract:

In order to study the factors that affect the effect of barium sulfate scale inhibition，three kinds of scale inhibitors
named ZX–101，TH–1 and TH–607B that resistance barium sulfate（strontium sulfate）were screened out to make experiments
of temperature，salinity，concentration of Ba2+ and SO2-4 impact on barium sulfate separately by static scale inhibition method.
The results show that these three inhibitors have shown great performance for barium sulfate scale，they can prevent scaling
of barium sulfate effectively. Their inhibition efficiency first increase and then decrease with the increasment of temperature
and salinity，and when the inhibitor concentration increases the inhibition efficiency increases. When the temperature is 65 ℃，
SO2-4 concentration is 0.55 g/L，salinity is 73 g/L，inhibitor concentration is 0.1 g/L and the concentration of Ba2+ increases from
0.64 g/L to 1.28 g/L，these three kinds of scale inhibition efficiency gradually decrease，respectively from 96.55%，97.65%，
98.04% down to 82.80%，87.83%，84.49%. While Ba2+ concentration is 0.8 g/L，inhibitor concentration is 0.08g/L and the
concentration of SO2-4 increases from 0.10 g/L to 0.60 g/L，their inhibition efficiency increase from 90.64%，96.49%，93.57%
to 99.79%，99.28%，99.79%，and then begin to decline，eventually drop to 93.72%，91.09%，80.06%.

Key words: inhibition efficiency, barium sulfate, influence factors, temperature, salinity, scaling ions