Ni-W镀管在CO_(2)注入井工况下的适用性研究  

Study on the Applicability of Ni.W Coated Tubing in CO_(2)Injection Well Environments

作　　者：马英文 邢希金 冯桓榰 杨芝乐 王竹 MA Yingwen;XING Xijin;FENG Huanzhi;YANG Zhile;WANG Zhu(CN00C Research Institute Co.,Ltd.,Beijing 100028,China;Institute for Advanced Materials and'Technology,University of Seience and Technology Beijing,Beijing 100083,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]北京科技大学新材料技术研究院,北京100083

出　　处：《材料保护》2024年第9期63-70,共8页Materials Protection

基　　金：中国海洋石油有限公司综合科研项目“高温动态腐蚀环境演化与经济型油套管防腐技术研究”项目(KJZH-2024-2301)。

摘　　要：为研究Ni-W镀管材料在CO_(2)注入井工况下的适用性,采用高温高压腐蚀模拟实验,结合扫描电镜、激光共聚焦显微镜及X射线衍射仪研究了Ni-W镀层的腐蚀行为。结果表明,在含有杂质的超临界CO_(2)注入工况下Ni-W镀层具有一定的耐均匀腐蚀能力,但存在局部腐蚀风险;在地层水反流的CO_(2)注入井工况下,微量的H_(2)S会诱发Ni-W镀层发生较为严重的腐蚀失效,造成镀层开裂和局部破损;在存在地层水反流的高含氧CO_(2)注入井工况下,Ni-W镀层会形成微裂纹,并在内外镀层界面形成腐蚀产物。For sludyng the applicabilily of Ni-W coaing in CO_(2)iniecion wels,the comosion behaviors of Ni-W coalings were sludied by hieh temperature and high-pressure corrosion simulation experiments combined with scanning electron microseope(SEM),laser confocal microscope and X-ray diractometer(XRD).Results showed that the Ni-W coating had centain wniform comosion resistance uder the condi tion of supereriical CO_(2)containing impurities injection condition,but there was locaized corrosion risk.In the case of CO_(2)injection well with formation water rellux,a small amount of H_(2)S would induce severe corrosion failure of Ni-W coatings,resulting in cracking and local damage of the coating.In the case of high oxygenated CO_(2)iniection well with formation water relux,micro-cracks would be formed in Ni-W coatings and corrosion products would be generated at the inner and outer coating interfaces.

关 键 词：CCUS Ni-W镀层 超临界二氧化碳 腐蚀 硫化氢 氧含量 

分 类 号：TE983[石油与天然气工程—石油机械设备]