CCUS注CO_(2)井管柱失效原因分析  

Failure Analysis of Pipe String in CCUS Carbon Dioxide Injection Well

作　　者：牛步青 郑振兴 李丹杰 靳俊娅 史交齐 刘西西 任枭雄 NIU Buqing;ZHENG Zhenxing;LI Danjie;JIN Junya;SHI Jiaoqi;LIU Xixi;REN Xiaoxiong(SINOPEC Shengli Oilfield Company,Dongying,Shandong 257099,China;Xi′an Serv Stress Engineering Technology Service Co.Ltd.,Xi′an,Shaanxi 710076,China)

机构地区：[1]中国石化股份有限公司胜利油田分公司,山东东营257099 [2]西安三维应力工程技术有限公司,陕西西安710076

出　　处：《石油管材与仪器》2025年第1期70-76,共7页Petroleum Tubular Goods & Instruments

摘　　要：某油田现场CCUS注CO_(2)井油管和套管在使用过程中发生断裂失效。通过宏观观察、磁粉检测、化学成分分析、力学性能测试、金相分析、腐蚀产物(EDS和XRD)分析、断口微观形貌分析以及环空液样品检测,对失效原因进行分析。结果表明,在含有硫化物腐蚀介质的油套环空环境中,在局部应力作用下,普通碳钢(N80-1)油、套管发生了硫化物应力腐蚀开裂失效。The failure of tubing and casing occurred during service at carbon dioxide injection well.Failure causes were analyzed by means of macro inspection,magnetic particle detection,chemical composition analysis,mechanical property test,metallographic inspection,corrosion products(EDS and XRD)analysis,microscopic fracture analysis,and annular liquid sample testing.Results showed that common carbon steel(N80-1)tubing and casing suffered from sulfide stress corrosion cracking failure due to sulfide corrosive medium contained in the annulus under the conditions of local stress.

关 键 词：碳捕获、利用和封存 油套管失效 失效分析 油套环空 硫化物应力腐蚀开裂 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]