油田集输管线腐蚀与防护研究.docVIP

分类号 TE832 密级 UDC 学号 3201096021 油田集输管线腐蚀及防护研究 学位申请人： 曹言光 指导教师： 马新沛 教授 张庆生 高工 学科领域： 材料工程 学位类别： 工程硕士 2006年10月 Research on Corrosion and Prevention of gathering lines of Oilfield Dissertation Submitted to Xi’an Jiaotong University In partial fulfillment of the requirement for the degree of Master of Engineering By Cao Yanguang (Material Engineering) Dissertation Supervisor: Professor. Ma Xinpei Senior Engineer. Zhang Qingsheng Oct., 2006 论文题目： 油田集输管线腐蚀及防护研究 学科专业： 材料工程 学位申请人：曹言光 指导教师： 马新沛教授，张庆生高级工程师 摘 要 近几年随着中原油田综合含水的上升和大量酸化、压裂、三次采油等措施的广泛实施，中原油田集输管线介质的腐蚀特性发生较大变化，同时集输管线也在进一步老化，管线及外防工程施工质量不理想，内防措施实施少，缓蚀剂加药方式存在很大缺陷，造成了日益突出的腐蚀问题，因管线腐蚀造成的经济损失逐年上升。 本文通过对中原油田集输管线腐蚀状况调查、集输管线介质特性分析、集输管线材质及腐蚀产物成份分析，得出集输管线腐蚀特征和主要腐蚀因素。针对集输管线介质腐蚀特性，20#钢和40#钢为主，目前老化程度严重，内防腐层种类较多，但采用内防的干支线仅占20～30～～～～～0～0.2MPa～～100ppm、200ppm、400ppm 浓度时，1.2m/s流速条件下的缓蚀率分别只有0.2m/s流速条件下的4.4％、32％、25％～25.3%，介质中细菌含量得到进一步抑制，基本降低1～28%～50% Title: Research on Corrosion and Prevention of gathering lines of Oilfield Speciality: Materials Engineering Applicant: Cao Yanguang Supervisor: Prof. Ma Xinpei，SE. Zhang Qingsheng ABSTRACT With the increasement of total water-cut and widely implementation of aboundent treatments such as acidizing, frac and third oil recovery, the property of medium gathering lines in Zhongyuan Oilfield has greatly changed and ageing of the gathering lines has also increased. At the same time, construction of lines and exterior preservation is in low quality, there are only little percent of the branch and main lines are adopted with inner preservation, and there is serious shortcoming with the dosing style of anti-corrosive agent. The problem of corrosion has been getting more serious, and economic loss due to line corrosion has been raising year by year. This thesis found out the corrosion characteristic and main reason of gathering lines through investigating the corrosion stat