摘要
苏203区块于2011年开发,目前面临重大腐蚀问题,严重影响气田的正常开采和运行。寻找一种适用于苏203井区生产工况的防腐蚀措施势在必行。对苏203井区的腐蚀情况进行了调研,并对高性能合金镀层进行了室内及现场应用评价。结果表明:苏203井区腐蚀情况严重,最高腐蚀速率达2.3mm/a,且出现穿孔的现象。高性能合金镀层具有良好的硬度、耐磨性和耐蚀性,能够明显降低试样的腐蚀速率,平均腐蚀速率为未镀层试样的3.84%~4.54%。将苏南19站站内转水管线更换为高性能合金镀层管线后,未发现壁厚明显变薄的现象,这表明高性能合金镀层具有良好的耐蚀性,可在苏203井区推广使用。
Su 203 block was developed in 2011.At present,it faced major corrosion problems,which seriously affected the normal mining and operation of gas fields.It is imperative to find an anti-corrosion measure suitable for the production conditions of the Su 203 well area.The corrosion of the Su 203 well area was investigated,and a highperformance alloy coating was evaluated for indoor and field applications.The results show that the corrosion situation of Su 203 well was serious,the highest corrosion rate was 2.3 mm/a,and the phenomenon of perforation occurred.The high-performance alloy coating had good hardness,wear resistance and corrosion resistance,and it could significantly reduce the corrosion rate of samples.The average corrosion rate of the high-performance alloy coating was only 3.84%to 4.54%of uncoated samples.After replacing the water transfer pipeline in the 19 station of Sunan as a high-performance alloy coating pipeline,the phenomenon that the wall thickness was significantly thinned was not found,indicating that the high-performance alloy coating had good corrosion resistance and could be popularized in the Su 203 well area.
引文
[1]吕瑞典,薛有祥.油气田腐蚀防护技术综述[J].石油天然气学报,2008(5):367-369.
[2]杨秀清.油气田腐蚀与防护技术[J].天然气工业,1994(5):59-62.
[3]李鹤林,路民旭.油气田腐蚀类型、特点及几个重要研究领域[C]//中国腐蚀与防护学会成立20周年学术年会,北京:[出版者不详],1999.
[4]李国敏,李爱魁,郭兴蓬,等.油气田开发中的CO2腐蚀及防护技术[J].材料保护,2003,36(6):1-5.
[5]郭学辉,周生杰,杜素珍,等.油气田中几种常见的腐蚀机理[J].辽宁化工,2014(1):52-56.
[6]杨光,王亚刚,曹成章,等.含硫油气田钻井腐蚀与防护对策[J].全面腐蚀控制,2008,22(5):16-18.
[7]曹建春,郭忠诚,周晓龙.镁合金表面耐蚀涂层研究进展[J].云南冶金,2003,32(6):28-32.
[8]李岩,谢发勤,吴向清.四种涂层在模拟油田环境下的腐蚀性能评价[J].电镀与精饰,2005,27(4):29-32.
[9]林乃明,谢发勤,吴向清,等.油套管表面防护技术的研究现状与展望[J].腐蚀与防护,2009,30(11):801-805.