超声-臭氧快速降解油田含聚洗井液的试验研究  

Experimental research on ultrasound-ozone rapid degradation for polymer-containing flushing fluid

作　　者：王尔珍[1,2] 田飞 方玉峰 孙爽 李莹 于熙洋 乔健鑫 宋文平 WANG Erzhen;TIAN Fei;FANG Yufeng;SUN Shuang;LI Ying;YU Xiyang;QIAO Jianxin;SONG Wenping(Oil&Gas Technology Research Institute,Changqing Oilfield Company,Xi’an 710018,China;State Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields,Xi’an 710018,China;10th Oil Production Plant of Changqing Oilfield Company,Qingcheng 745100,China;1st Oil Production Plant of Changqing Oilfield Company,Xi’an 710018,China;Harbin Institute of Technology,Harbin 150001,China;Chongqing Research Institute,Harbin Institute of Technology,Chongqing 401120,China)

机构地区：[1]长庆油田分公司油气工艺研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]长庆油田分公司第十采油厂,甘肃庆城745100 [4]长庆油田分公司第一采油厂,陕西西安710018 [5]哈尔滨工业大学,黑龙江哈尔滨150001 [6]哈尔滨工业大学重庆研究院,重庆401120

出　　处：《工业水处理》2023年第10期163-167,共5页Industrial Water Treatment

基　　金：国家自然科学基金面上项目(51574098)。

摘　　要：以聚合物驱油为代表的三次采油技术已经在我国各大主力油田逐步推广和应用,随聚合物用量不断增大,油田含聚洗井液的处理量也随之剧增。由于聚合物能够促进油水混合物的乳化,洗井液中的油水分离速率极为缓慢,且含聚洗井液的黏度大,与常规洗井液混合后循环利用将对油田水系统产生诸多不利影响。在分析了油田含聚洗井液组分和常规氧化处理方法的基础上,针对现有联合处理站工艺固化、空间受限以及罐车排放速度快、降解处理时间短等问题,提出了超声-臭氧联合降解聚合物的工艺方法,并搭建了相应的室内试验平台。以含聚洗井液黏度下降率、聚合物浓度为评价指标,分别开展了超声波单独处理、臭氧单独处理、超声-臭氧联合处理的试验研究。结果表明,超声处理3 min后通入臭氧1 min,含聚洗井液黏度下降率可达95%以上,聚丙烯酰胺(PAM)去除率达92%以上,可实现油田含聚洗井液的高效降解。Polymer flooding technology,which represents tertiary oil recovery,has been gradually promoted and applied in major oilfields of China.As the amount of polymer used continues to increase,volume of polymer-containing flushing fluid sewage has also increased sharply.Since the polymer can promote the emulsification,oil-water separation in the flushing fluid becomes extremely slow.In addition,high viscosity of polymer-containing flushing fluid leads to many adverse effects to oilfield water system when it is mixed with common flushing fluid.Based on the analysis of the components of polymer-containing sewage and the conventional oxidation treatment method,ultrasonic-ozone synergetic degradation of polymer process was proposed in this work,aiming at solving the problems including fixed procedure,limited space of treatment station,fast discharge rate of tank truck,and insufficient degradation treatment duration.Besides,an experimental device for treating polymer-containing flushing fluid was built and a series of experiments were carried out with ultrasonic alone,ozone alone and synergistic process of ultrasonic and ozone.It was found that after ultrasonic treatment for 3 minutes and ozone treatment for 1 minute,the viscosity reduction rate of flushing fluid could reach more than 95% and the polyacrylamide(PAM) removal rate could reach more than 92%,which achieved efficient degradation of oilfield polymer-containing flushing fluid.

关 键 词：含聚洗井液 聚合物降解 超声-臭氧联合工艺 超声空化 

分 类 号：TE53[石油与天然气工程—油气田开发工程]