摘要
针对高温降黏缓蚀剂在高温高含CO2/H2S环境中的适应性问题,利用高温高压失重腐蚀试验和高温高压电化学测量技术对高温降黏缓蚀剂进行缓蚀性能测试,采用旋转黏度计测试了缓蚀剂对现场原油的降黏效果,应用电化学阻抗技术测量了缓蚀剂的残余浓度。研究表明,该缓蚀剂为阳极型缓蚀剂,将质量浓度为200 mg/L和80 mg/L的缓蚀剂分别加入掺稀油中,其对井下油管材质P110和地面集输系统管线材质20G有明显的缓蚀作用,均匀腐蚀速率小于0.076 mm/a且无明显点蚀。当缓蚀剂质量浓度为200 mg/L时,对现场原油的降黏率可达20%,井筒腐蚀试验后溶液中缓蚀剂的残余浓度大于30 mg/L。
In view of the adaptability problem of high temperature and viscosity reduction corrosion inhibitor in the high temperature and high CO2/H2S environment,the high temperature and high pressure weightless corrosion tests and high temperature and high pressure electrochemical measurement technologies are used to test the corrosion inhibition performance of high temperature and viscosity reduction corrosion inhibitor,the viscosity reduction effect of corrosion inhibitor on filed crude oil is measured by the rotary viscometer,and the residual concentration of corrosion inhibitor is measured by electrochemical impedance technology.The research shows that the corrosion inhibitor is an anode type of corrosion inhibitor.When 200 mg/L and 80 mg/L of the corrosion inhibitor is added respectively,it has obvious corrosion inhibition effect on the downhole tubing material P110 and the surface gathering and transportation system material 20G.The average corrosion rate is less than 0.076mm/a,and there is no obvious pitting corrosion.When the concentration(mass concentration)of corrosion inhibitor reaches 200 mg/L,the viscosity reduction rate of field crude oil reaches 20%,and the residual concentration of corrosion inhibitor in the solution after the wallhole corrosion test is more than 30 mg/L.
作者
方建波
葛睿
石锐
赵国仙
薛艳
唐海飞
李丹平
宋洋
FANG Jianbo;GE Rui;SHI Rui;ZHAO Guoxian;XUE Yan;TANG Haifei;LI Danping;SONG Yang(No.2Oil Production Plant of Northwest Oilfield Branch,SINOPEC;Material Science and Engineering Department of Xi'an Shiyou University;Xi'an Maurer Petroleum Engineering Laboratory Co.,Ltd.)
出处
《油气田地面工程》
2019年第9期109-114,共6页
Oil-Gas Field Surface Engineering
关键词
高温降黏缓蚀剂
缓蚀率
失重法
电化学法
降黏率
残余浓度
high temperature and viscosity reduction corrosion inhibitor
corrosion inhibition rate
weightless method
electrochemical method
viscosity reduction rate
residual concentration
