摘要
针对塔河油田注水井下及地面管道腐蚀穿孔严重现状,结合注水井腐蚀特征及腐蚀因素分析,得出注水井井下注水线附近腐蚀严重,根据牺牲阳极阴极保护技术特点,在TK422注水井油管内外壁安装牺牲阳极,实验结果表明,该注水油管内外壁均未见明显腐蚀,受牺牲阳极保护的P110S材质内壁相比未受保护的点腐蚀速率下降91%,该技术抑制井下腐蚀效果明显。并在地面金属管道防腐中开展牺牲阳极阴极保护技术推广研究,设计了地面金属碳钢管道旁通牺牲阳极保护装置,结合管道规格、腐蚀速率及牺牲阳极性能参数特点,得出地面不同规格管道保护范围内的牺牲阳极用量,开展经济性评价并提出腐蚀控制建议。
According to the corrosion in Tahe oilfield downhoIe and surface pipeline perforation serious situation, combined with the analysis of water injection wells corrosion characteristics and factors, the injection well bet thewaterline corrosion is serious, according to the technical characteristics of sacrifice anode cathodic protection with sac-rificial anode in TK422, injection well tubing wall installation. The test results show that, the water injection pipewall were not obvious corrosion by P1100S material, the inner wall of the sacrificial anode protection compared to thepoint corrosion rate of unprotected droped 91%, the technology of downhole corrosion inhibition effect was obvious.And the development of anode and cathode protection technology at the expense of ground metal pipeline corrosion wasstudied, the metal carbon steel pipe bypass sacrificial anode protection device were designed, combined with the pipingspecification, the corrosion rate and the sacrificial anode performance parameters, that the different specifications ofpipe protecting sacrificial anode dosage range was got, economic evaluation was carried out and corrosion control suggestions are put forward.
关键词
注水井
井下及地面管道
腐蚀
牺牲阳极
旁通
water injection well, downhole and surface pipeline, corrosion, sacrificial anode, bypass
