油田酸化压裂返排液的回注处理技术研究  

Research on injection treatment technology of acidizing fracturing flowback fluid in oilfield

作　　者：路建萍 沈燕宾 王佳 许磊 谢元 李辰 王兰 LU Jian-ping;SHEN Yan-bin;WANG Jia;XU Lei;XIE Yuan;LI Chen;WANG Lan(Shaanxi Key Laboratory of Fine Petroleum Chemicals,Shaanxi Chemical Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]陕西化工研究院有限公司陕西省石油精细化学品重点实验室,陕西西安710054

出　　处：《应用化工》2022年第6期1685-1690,共6页Applied Chemical Industry

基　　金：陕西省技术创新引导专项(2019TG-008);陕西延长石油(集团)科技项目(ycsy2017ky-A-37)。

摘　　要：对强腐蚀性、高黏度、高含油量和高悬浮物量的酸化压裂返排液进行了“降黏-中和-脱稳-过滤”处理。结果表明,最佳降黏工艺条件为:pH=4,H_(2)O_(2)投加量2000 mg/L,Fe^(2+)投加量500 mg/L,反应时间60 min;最佳脱稳工艺为:pH=8,PAFC投加量120 mg/L,PAM投加量1.2 mg/L。优化条件下,经综合处理后的酸化压裂返排液,其含油量4.4 mg/L,SS含量1.3 mg/L,平均腐蚀率0.035 mm/a,黏度1.4 mPa·s,与地层水以任意比例混合,配伍性较好,各指标均达到回注水的标准。The acidizing fracturing flowback fluid with strong corrosion,high viscosity,high oil content and high suspended matter content was treated with“viscosity reduction,neutralization,de-stabilization and filtration”.The results show that the optimal viscosity reduction conditions were as follows:pH was 4,the dosing quantity of H_(2)O_(2)was 2000 mg/L,the dosing quantity of Fe^(2+)was 500 mg/L,reaction time was 60 min and the optimal instability conditions were as follows:pH was 8,the dosing quantity of PAFC was 120 mg/L,the dosing quantity of PAM was 1.2 mg/L.Under the optimized conditions and after comprehensive treatment,the oil content and SS content of the acidizing fracturing flowback fluid were 4.4 mg/L and 1.3 mg/L,the average corrosion rate was 0.035 mm/a,the viscosity was 1.4 mPa·s.The treated acidizing fracturing flowback fluid was mixed with formation water in any proportion,and the compatibility was good.All indicators meet the standard of re-injection.

关 键 词：酸化压裂返排液 降黏 脱稳 回注 配伍性 

分 类 号：TQ432.9[化学工程] TE357.2[石油与天然气工程—油气田开发工程]