摘要
为明确温度、CO_(2)分压对N80钢管材的腐蚀影响,并结合腐蚀环境优化匹配合适的防腐措施,通过失重法,利用高温高压釜模拟CO_(2)驱油工况,得到材料的腐蚀速率,根据扫描电子显微镜、利用EDS分析、结合XRD分析确定腐蚀产物种类。结果表明,模拟CO_(2)驱工况下,N80钢在CO_(2)分压为0~10 MPa时,气、液相的腐蚀速率均超过0.076 mm/a的行标要求,腐蚀产物主要可能组分为FeCO_(3),且随着压力升高,N80管材的平均腐蚀速率呈先增大后减小趋势。随温度的升高,N80管材在80℃出现腐蚀极大值,在100℃时腐蚀产物膜层致密,腐蚀速率降低。因此,须采用匹配的缓蚀剂或其他防腐措施,以提高其安全使用效果。
In order to clarify the influence of temperature and CO_(2) partial pressure on corrosion of N80 steel pipe,and to optimize and match appropriate anti-corrosion measures in combination with corrosion environment by weight loss method,the corrosion rate of materials was obtained by simulating CO_(2) flooding conditions with high temperature autoclave,and the types of corrosion products were determined by scanning electron microscope,EDS analysis and XRD analysis.The results show that under simulated CO_(2) flooding conditions,when CO_(2) partial pressure is 0~10 MPa,the corrosion rate of both gas and liquid phases exceed the standard requirements of 0.076 mm/a,and the main possible components of corrosion products are FeCO_(3) and with the increase of pressure,the average corrosion rate of N80 pipe increases at first and then decreases.With the increase of temperature,the corrosion maximum of N80 pipe appears at 80℃,and the corrosion product film is dense and the corrosion rate decreases at 100℃.Therefore,it is necessary to adopt matched corrosion inhibitor or other anti-corrosion measures to improve its safe use effect.
作者
李辉
马振鹏
迟九蓉
罗江云
张馨予
刘星悦
LI Hui;MA Zhen-peng;CHI Jiu-rong;LUO Jiang-yun;ZHANG Xin-yu;LIU Xing-yue(Research Institute of Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710075,China;Xiasiwan Oil Production Plant of Yanchang Oilfield Co.,Ltd.,Yanan 716105,China)
出处
《应用化工》
CAS
CSCD
北大核心
2022年第4期976-978,986,共4页
Applied Chemical Industry
基金
国家重点研发计划资助(2018YFB0605502)。
作者简介
李辉(1981-),男,宁夏银川人,陕西延长石油(集团)有限责任公司研究院高级工程师,硕士,主要从事油田化学方面相关研究,电话:029-89853910,E-mail:39109626@qq.com。
