The Influencing Factors of CaCO3 Scaling in Oilfield

Lan Lan Yu; Xu Rui Sun; Bao Hui Wang; Liang Lei

doi:10.4028/www.scientific.net/AMM.170-173.1230

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 170-173The Influencing Factors of CaCO3 Scaling in...

The Influencing Factors of CaCO₃ Scaling in Oilfield

Abstract:

For the problem of serious scaling in Daqing oilfield, using XRD and SEM to detect the scale sample, investigating the influences of concentration of NaCl, KCl, Mg²⁺ and temperature on the solubility of CaCO₃, and analyzing these factors on the rule of influence on CaCO₃ scaling. According to the field test, the curve of solubility of CaCO₃ in every conditions was drawed, and study the effect of ultrasonic technique to CaCO₃ scaling. Results indicated that the scaling in oilfield is mainly CaCO₃, temperature is an important factor to affect CaCO₃ scaling, NaCl、KCl and Mg²⁺ have a certain effect on CaCO₃ solubility, and the ultrasonic can achieve the purpose of anti-scaling.