抗硫套管钢P110SS在高含H_2S/CO_2条件下的硫化物应力腐蚀破裂敏感性  

Stress Corrosion Cracking Sensitivity of Sulfide-resistant Casing Steel P110SS in Hyperbaric H_2S/CO_2 Environments

作　　者：王树涛[1] 郑新艳[2] 李明志[1] 黄雪松[1] 关建庆[1] 郑树启[3] 陈长风[3] 陈月民[1] 

机构地区：[1]中原油田采油工程技术研究院,濮阳457001 [2]中原油田培训中心,濮阳457001 [3]中国石油大学(北京)材料科学与工程系,北京102249

出　　处：《腐蚀与防护》2013年第3期189-192,共4页Corrosion & Protection

基　　金：国家科技重大专项(2008ZX05017-005)

摘　　要：利用高温高压反应釜模拟普光气田的工况环境,采用慢应变速率拉伸试验(SSRT)方法研究了抗硫套管钢P110SS在高含H2S/CO2条件下的硫化物应力开裂(SSC)敏感性。结果表明,在腐蚀环境中P110SS的力学性能和塑性损伤比较严重;随着温度、H2S/CO2分压升高,P110SS力学性能和塑性损伤逐渐减弱,SSC敏感性降低,温度起主导作用;SSC敏感性由高到低顺序:井口工况条件>井中部工况条件>井底工况条件;井口工况是防范SSC的重点。The sulfide stress cracking （SSC） sensitivity of sulfide resistant casing steel P110SS in hyperbaric H2S/CO2 environments was studied by slow strain rate test （SSRT） method using a high temperature/pressure autoclave with simulated operating environments of Puyang Gas Field. The results show that compared with the blank condition, the mechanical property damage and plastic damage of P110SS were more serious in corrosion environments. With the increase of temperature, H2S/CO2 partial pressure rose gradually, the mechanical performance damage and plastic damage of Pll0SS weakened, SSC sensitivity of P110SS reduced. Temperature played a leading role. SSC sensitivity from high to low order： well head condition, well middle condition, well bottom condition. The mouth of well condition is the key guard against SSC.

关 键 词：抗硫套管钢P110SS 高含H2S CO2 慢应变速率拉伸试验 硫化物应力开裂 

分 类 号：TG172.9[金属学及工艺—金属表面处理]