摘要
为克服现有硫酸盐除垢剂的不足,增加螯合剂与添加剂之间的协同作用,提高除垢效率,研制了一种以螯合剂为主剂的碱性除垢剂SA-209,考察了除垢剂浓度、除垢时间、p H值、温度、盐浓度对硫酸钡锶垢除垢率的影响。结果表明:随SA-209浓度、除垢时间和温度的增加,除垢剂对钡锶垢的除垢率先增加后逐渐趋于稳定;随p H值的增加,除垢率先增加后降低;随溶液中KCl浓度的增加,除垢率缓慢减小。SA-209对钡锶垢除垢的最佳使用条件为:加量4%数12%、除垢时间4数12 h、溶液p H值11数12、除垢温度80数120℃。SA-209对硫酸钡和硫酸锶的除垢率约为55%和65%,对以硫酸钡垢为主要成分的海上油田垢样的除垢率为72.4%;4%和12%的SA-209对N-80钢片的腐蚀速率分别为0.2022和0.4412 g/(m^2·h),明显低于行业标准。SA-209具有除垢率高,对设备、管柱腐蚀低的特点,适用于酸液难溶垢的处理。
In order to overcome the shortcomings of existing sulfate scale detergent and increase scale removal rate by enhancing the synergistic effect between chelating agent and additives, a kind of chelating agent-based alkaline detergent named as SA-209 was developed. The effects of SA-209 concentration, descaling time, pH value, temperature, and salt concentration on the scale removal rate for barium and strontium sulfate scale were evaluated. The results showed that with the increase of SA-209 concentration,descaling time and temperature, the scale removal rate of SA-209 to barium and strontium sulfate scale increased first and then gradually stabilized;with the increase of pH value, the scale removal rate increased first and then decreased;and with the increase of KC1 concentration in the solution, the scale removal rate decreased slowly. The optimum descaling condition of SA-209 to barium and strontium sulfate scale was obtained as follows： 4%--12% SA-209 dosage, 4--12 h descaling time, 11--12 pH value, 80--- 120~ descaling temperature. The scale removal rate of SA-209 to barium and strontium sulfate was about 55% and 65% respectively, and to scale sample in offshore oilfield with barium sulfate as the main component was 72.4%. The corrosion rate of 4% and 12% SA-209 on N-80 steel sheet was 0.2022 and 0.4412 g/（m2. h） respectively, which was significantly lower than that in industry standard. SA-209 had high scale removal rate and low corrosion to equipment or tubing which was suitable for the scale undissolved by acid.
作者
李年银
贺代兰
赵立强
张航
余瑞青
徐昆
LI Nianyin HE Dailan ZHAO Liqiang ZHANG Hang YU Ruiqing XU Ku(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P R of China Engineering and Technology Institute, Southwest Oil and Gas Branch Company,Sinopec,Deyang, Sichuan 618000, P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2016年第3期537-541,546,共6页
Oilfield Chemistry
基金
国家自然科学基金面上项目"多孔介质中酸液的流动反应行为研究"(项目编号51574197)
关键词
钡锶垢
螯合剂
碱性除垢剂
barium and strontium sulfate scale
chelating agent
alkaline detergent
