Journal of Petrochemical Universities

Journal of Petrochemical Universities ›› 2024, Vol. 37 ›› Issue (3): 42-48.DOI: 10.12422/j.issn.1006-396X.2024.03.006

• Petroleum Engineering • Previous Articles     Next Articles

Study on Stress Corrosion of Super 13Cr Stainless Steel in Oil Field Simulation Fluid

Xiaogang DONG1(), Xuehong HE1, Shenglong QIAO1, Shidong LIU1, Shudong YAN1, Zepeng AN2   

  1. 1.Jingbian Oil Production Plant,Yanchang Oilfield Co. Ltd. ,Yanchang Shaanxi 717199,China
    2.School of Chemistry and Chemical Engineering,Xi'an University of Petroleum,Xi'an Shaanxi 710016,China
  • Received:2023-11-01 Revised:2024-04-18 Published:2024-06-25 Online:2024-06-18

超级13Cr不锈钢在油田模拟液中的应力腐蚀研究

董小刚1(), 贺雪红1, 乔生龙1, 刘世东1, 闫树东1, 安泽鹏2   

  1. 1.延长油田股份有限公司 靖边采油厂,陕西 延长 717199
    2.西安石油大学 化学化工学院,陕西 西安 710016
  • 作者简介:董小刚(1981),男,高级工程师,从事油气田开发工程方面的研究;E-mail:dongxg1981@163.com
  • 基金资助:
    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)

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.

Key words: Super 13Cr stainless steel, Acid liquid, Salt water containing acid, Stress corrosion, Corrosion inhibitor

摘要:

为延长超深井超级13Cr不锈钢油管的生命周期,降低生产过程中复杂钻完井工作液及地层产出流体导致的应力腐蚀,开展了应力腐蚀产生机理分析,并提出了应对策略;基于聚合成膜缓蚀机理研发了缓蚀剂;在模拟工况和标准工况下,评价了超级13Cr不锈钢在酸液及加/未加缓蚀剂的返排液中的应力腐蚀情况。结果表明,加入缓蚀剂的酸液达到缓蚀要求;在返排液中,超级13Cr不锈钢的宏观腐蚀速率较大;在酸液及返排液中,超级13Cr不锈钢发生应力腐蚀,且在返排液中应力腐蚀较严重;在实验温度为140 ℃、压力为10 MPa的条件下,超级13Cr不锈钢在返排液中7 d后的应力腐蚀裂纹宽度为3~5 μm,而加入体积分数为1%的缓蚀剂后测试72 h,超级13Cr不锈钢试片未产生应力腐蚀,说明该缓蚀剂可抑制超级13Cr不锈钢在高温环境中的应力腐蚀开裂。研究结果对超深井钻完井安全施工及安全生产具有借鉴意义。

关键词: 超级13Cr不锈钢, 酸液, 含酸盐水, 应力腐蚀, 缓蚀剂

CLC Number: 

Cite this article

Xiaogang DONG, Xuehong HE, Shenglong QIAO, Shidong LIU, Shudong YAN, Zepeng AN. Study on Stress Corrosion of Super 13Cr Stainless Steel in Oil Field Simulation Fluid[J]. Journal of Petrochemical Universities, 2024, 37(3): 42-48.

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.