稠化酸酸化返排液处理方法研究  

Study thickened liquid processing method of acid flowback

作　　者：谢娟[1] 张杰[1] 任越飞 

机构地区：[1]西安石油大学化学化工学院陕西省油气田环境污染控制与储层保护重点实验室,陕西西安710065 [2]长庆油田分公司第三采气厂,内蒙古乌审旗017300

出　　处：《应用化工》2017年第5期858-861,共4页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(51504193);陕西省教育厅专项科研计划资助项目(15JS089)

摘　　要：陕北某气井稠化酸返排液具有pH低、腐蚀性强、矿化度高、SS含量高、Ca^(2+)含量高和低透光率的特征。分析了稠化酸返排液的水质组成性质,采用提高返排液p H以降低Ca^(2+)含量,再通过絮凝沉降除去SS,并预测处理后酸化返排液与注入水按不同比例混合后的结垢趋势。结果表明,在调节酸化废液pH为11.0,PAC投加量为500 mg/L,PAM投加量为30 mg/L时,处理水上清液的透光率可达到98.5%。在30~80℃下,处理后稠化酸返排液与注入水按照不同体积比混合均无碳酸钙和硫酸钙结垢趋势。混合后可降低界面张力,有利于提高注入水驱油效率。A gas well in northern Shaanxi thickening acid flowback has a low pH, corrosion resistance, high salinity,high SS content,features high Ca2＋ content and a low transmittance. This paper analyzes the thickening acid flowback composition of the nature of water quality, the use of improve flowback pH to re-duce the content of Ca2＋ , followed by removal of SS by flocculation and settling, and predict post-treat-ment acidification return junction drain was mixed with the injected water in different proportions after scale trend. The results show that： in the regulation of waste acidified to pH 11. 0,PAC dosage of 500 mg/L,PAM dosage of 30 mg/L,the light transmittance of the supernatant treated water could reach 98.5% ？ At 30-80 ℃,after treatment thickening acid flowback water mixed with injection of calcium car-bonate and calcium sulfate were no scaling trend in different proportions （ V/V） . It can significantly reduce the mixture was poured into water interfacial tension, help to improve the efficiency of injected water flooding.

关 键 词：稠化酸 返排液 结垢预测 界面张力 配伍性 

分 类 号：TQ314.253[化学工程—高聚物工业]