牺牲阳极防腐装置在潜油电泵上的应用.doc

中国石油大学：11414 学 号： G0402173 中国石油大学硕士研究生学位论文 (申请工程硕士学位) 牺牲阳极防腐装置在 潜油电泵上的应用 学科专业：石油与天然气工程 培养方向：油 气 田 开 发 硕士生： 张 喜 雨 指导老师：裴 柏 林 (副教授) 入学日期：2004年3月 论文完成日期：2006年11月 摘 要 随着我国石油天然气工业勘探开发的发展，特别是近十年来含H2S,CO2 Cl-及高含水等多种腐蚀介质的油气田出现，石油工业中腐蚀问题愈来愈引起人们的关注。 金属腐蚀是金属及其结构物或制件表面与其所处环境介质之间的化学反应、电化学反应或物理溶解所引起的破坏或变质,它是金属在环境作用下所患的“疾病”。海洋大气夹带着海盐粒子沉积在金属表面后,由于海盐(特别是氯化钙和氯化镁)很容易吸水潮解,所以在金属表面形成一层导电性良好的薄液膜,从而导致了电化学腐蚀。 电潜泵采油中应用牺牲阳极阴极保护装置最早在俄罗斯油田日尔诺油田和美国阿拉斯加油田就曾经应用过。采用牺牲阳极防腐装置可以有效的延缓电泵机组壳体在井筒里被腐蚀的程度，从而延长电泵机组运行寿命，减少作业大修频率，从而降低采油成本，本文就富含二氧化碳的流体腐蚀油井特性进行了介绍。并就在印尼中海油油田实施带有牺牲阳极防腐装置的电泵机组运行情况进行了一个系统的分析，为以后牺牲阳极装置安装在电泵采油提出了一个创新的办法。 关键词：电潜泵 牺牲阳极 腐蚀 人工举升 CO2 Abstract As the development of the oil and gas industry of our country, especially the appearance of oil field with high content of H2S, CO2 Cl- in the latest 10 years. The corrosion problem in oil and gas industry became more and more corned. The metal corrosion is the kind of the electrochemistry, the electrochemistry or the physical solution between the metal or the related construction and the environment material, which is the sick the metal suffered in the environment. A layer of superior conductive thick liquild was formed in the surface of the metal due to the good solution of the sea salt (especially CaCl2 and MgCl2) when the sea air with salt particles are deposited on the surface of the metal. The electrochemistry corrosion was formed. The equipment with Anode-loss cathodic-protection anti-corrosion in electrical submersible pump was once put into production in Russia oil field and Alaska oil field in American. The ESP equipment with anode-loss anti-corrosion can ease the corrosion degree and extend the ESP average running span-life, lower the frequency of ESP workover and decrease the production cost. The thesis introduce the characteristic of oil well with high content of CO2 and and analysis the basic reason of the ESP pump corrosion and the running operation of the equipment with anode-lo