石油化工高等学校学报2024，Vol.37Issue(3)：42-48,7.DOI:10.12422/j.issn.1006-396X.2024.03.006
超级13Cr不锈钢在油田模拟液中的应力腐蚀研究
Study on Stress Corrosion of Super 13Cr Stainless Steel in Oil Field Simulation Fluid
摘要
Abstract
In order to extend the life cycle of super 13Cr stainless steel tubing in ultra-deep wells and reduce the stress corrosion caused by complex drilling and completion fluids and formation output fluids during the production process,a stress corrosion generation mechanism analysis has been carried out and a countermeasure strategy has been put forward.Based on the corrosion inhibition mechanism of polymerized film-forming corrosion inhibitor,a corrosion inhibitor has been developed.The stress corrosion of super 13Cr stainless steel has been evaluated in the acid fluids and the return fluids with/without the corrosion inhibitor in the simulated and standard conditions.The results show that the acid solution with corrosion inhibitor met the corrosion inhibition requirements.The macroscopic corrosion rate of super 13Cr stainless steel in the return fluids was larger.There was stress corrosion in the acid solution and the return fluids,and the stress corrosion of the return fluids was more serious.Under the experimental temperature of 140℃and pressure of 10 MPa,the stress corrosion crack width of super 13Cr stainless steel in the return fluids after one week was 3～5 μm,test 72 h after the addition of corrosion inhibitor with a volume fraction of 1%,super 13Cr stainless steel test piece did not produce stress corrosion,which indicated that the corrosion inhibitor could restrain the stress corrosion cracking of super 13Cr stainless steel in the high temperature environment.The result of study is of great significance for the safe construction and safe production of ultra-deep well drilling and completion.关键词
超级13Cr不锈钢/酸液/含酸盐水/应力腐蚀/缓蚀剂Key words
Super 13Cr stainless steel/Acid liquid/Salt water containing acid/Stress corrosion/Corrosion inhibitor分类
能源科技引用本文复制引用
董小刚,贺雪红,乔生龙,刘世东,闫树东,安泽鹏..超级13Cr不锈钢在油田模拟液中的应力腐蚀研究[J].石油化工高等学校学报,2024,37(3):42-48,7.基金项目
延长油田股份有限公司勘探开发技术研究中心科技项目(ycsy2019ky-B-3). （ycsy2019ky-B-3）
