防止三元复合驱后油井结垢的清防垢剂的制备与应用

Preparation and Application of Anti-fouling Agent for Preventing Oil Well Scaling after ASP Flooding

付亚荣 马永忠 李小永 蔡远红 姜一超 孙学峰 于志铭 韩海英

FU Yarong MAYongzhong LI Xiaoyong CAI Yuanhong JIANG Yichao SUN Xuefeng YU Zhiming HAN Haiying

为解决三元复合驱后油井结垢问题，分析了三元复合驱后油井结垢的机理及垢的成分，以羟基五甲叉膦酸、膦基聚马来酸酐防垢剂、C12-C18脂肪醇聚氧乙烯（10）醚、USP2 烷基为十五烷基、乌洛托品、硒化钠等原料合成了清防垢剂，研究了清防垢剂浓度对清垢和防垢效果的影响，并在华北油田百余口油井进行了应用。研究结果表明，三元复合驱油井所结垢为碳酸盐垢和硅垢的复合体，清防垢剂加量为20～30 mg/L 时，清垢率大于60%、防垢率大于95%。现场应用结果表明，清防垢剂不仅解决了垢卡泵、井筒管杆的结垢问题，而且节约油井能耗。三元复合驱后油井平均检泵周期由约70 d 延长至约600 d，单井能耗降低23.19 百分点，达到了满足油田生产正常运行和节能的目的。表2参25

In order to solve the problem of scale formation in oil well after three compound flooding，the mechanism of scale formation and the composition of the scale were analyzed. Anti-fouling agent was synthesized with hydroxy five methyl phosphonic acid，scale inhibitor co-hypophosphite polymaleic anhydride，C12—C18 fatty alcohol polyoxyethylene （10） ether，USP2 alkyl fifteen，urotropine，sodium selenate and other raw materials. The influence of detergent concentration on the cleaning and anti-scale effect was studied，and anti-fouling agent was applied in hundreds of oil wells in Huabei oilfield. The results showed that the scale in oil wells was a complex of carbonate scale and silicon scale. When the amount of anti-fouling agent was 20—30 mg/L，the scale cleaning rate was greater than 60%，and the anti-scaling rate was greater than 95%. The practical results showed that anti-fouling agent not only solved the scaling problem of pump and pipe or rod in shaft，but also saved the energy consumption of oil well. The average pump cycle of oil well extended from about 70 d to about 600 d and the energy consumption of single well decreased by 23.19 percentage points，meeting the normal operation and energy saving requirements.

10.19346/j.cnki.1000-4092.2016.04.033