硫酸钡/锶垢除垢剂配方优化及性能评价

Formulation Optimization and Performance Evaluation of Barium Sulfate/Strontium Scale Remover Viscosity Reduction

袁秀妮 徐自强 赵敏 张清涛 孙妩娟 王嗣昌 都伟超 柯从玉

YUAN Xiuni XU Ziqiang ZHAO Min ZHANG Qingtao SUNWujuan WANG Sichang DUWeichao KE Congyu

为了清除油气田开发过程中产生的具有结垢致密、溶解度低以及不溶于酸碱等特点的硫酸锶钡垢，采用化 学除垢技术，首先筛选了一种螯合主剂，再优选了不同助剂，利用他们之间的协同增效以及改性作用，通过单因 素实验确定了最优的硫酸钡/锶垢除垢剂配方为：10% DTPA+6%水杨酸+0.03%聚丙烯酸钾、0.2%吐温-80，同时 考察了不同pH、温度以及反应时间下的除垢效果的影响，结果表明，当pH值为12、温度为80 ℃、反应时间为8 h 时除垢效果最佳，在此条件下对硫酸钡和硫酸锶以及实际垢样的除垢率分别为79.41%和80.56%以及59.7%。该 除垢剂具有除垢效率高、除垢时间短及成本较低的优点，在油气田除垢方面具有广阔应用前景。

In order to remove strontium barium sulfate scale generated during the development of oil and gas fields，which is characteristic of dense scaling，low solubility，and insoluble in acids and alkalis，the chemical scaling technology was adopted. Firstly，a chelating agent was selected，and then different additives were added to utilize their synergistic and modifying effects. The optimal formulation of barium sulfate/strontium scale remover was determined through single factor experiments as follows， 10% DTPA+ 6% salicylic acid+0.03% potassium polyacrylate concentration+ 0.2% Tween-80. The effects of pH，temperature，and reaction time on the scale removal effect were also investigated. The results showed that the best scale removal effect was achieved when the pH value was 12，the temperature was 80 ℃ ，and the scale removal time was 8 hours. Under these conditions，the descaling rates of barium sulfate，strontium sulfate，and actual scale samples were 79.41%，80.56% and 59.7%，respectively. The scale remover had the advantages of high scale removal efficiency，short scale removal time and low cost，and had broad application prospects in oil and gas field scale removal.

10.19346/j.cnki.1000-4092.2023.04.021