通过对陕北某油田四个区块站内采出水的水质进行分析，结合现场挂片测试，研究了其腐蚀原因，对现场防腐蚀技术进行了研究及效果评价。结果表明：该区块站采出水中腐蚀性介质含量较高，这会对地面管线造成了严重腐蚀。采用涂层、特殊接头加线状阳极阴极保护的防腐蚀措施后，管道内涂层表面光滑、均匀、致密，无破点，保护电位基本稳定并满足标准要求。特种接头保证了焊接接口部位与管体防腐蚀等级的一致性，解决了管线焊接对接口涂层的破坏问题。实施涂层加阴极保护防腐蚀措施后，生产运行总成本可节约34%以上。

Through the analysis of the water quality of the produced water in four block stations of an oilfield in northern Shaanxi, combined with on-site coupon test, the corrosion causes of pipelines were studied, and the on-site anti-corrosion technology was researched and evaluated. The results show that the corrosive medium content in the produced water of the block stations was high, which would cause severe corrosion to the surface pipelines. After the application of anti-corrosion measures such as coatings, special joints and linear anode cathodic protection, the inner coating surface of pipelines was smooth, uniform and dense, without broken points, and the protection potential was basically stable and met the standard requirements. The special joints ensured the consistency of corrosion resistance of welding interface and pipe body, and solved the problem of pipeline welding damage to the interface coating. After the implementation of coating and cathodic protection anti-corrosion measures, the total production and operation costs could be saved by more than 34%.