J55、3Cr在模拟长庆油田环境中的CO2及H2S腐蚀研究

李建中, 张发旺, 赵伟轩, 赵海勇, 张立原, 赵幸, 郭倩倩, 魏紫滢, 张峰彬, 丁凯, 李晓亮

doi:10.16577/j.issn.1001-1560.2022.0342

材料保护 >

2022 , Vol. 55 >Issue 12: 79 - 83

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0342

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J55、3Cr在模拟长庆油田环境中的CO₂及H₂S腐蚀研究

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中国石油天然气股份有限公司长庆油田分公司第十一采油厂

李建中(1978-)，一级工程师，主要从事采油工艺及油气田防腐方面的工作，电话:0934-8391168，E-mail:lijz_cq＠petrochina.com.cn

收稿日期: 2022-06-21

修回日期: 2022-07-29

录用日期: 2022-08-31

网络出版日期: 2023-12-27

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Study on CO₂ and H₂S Corrosion of J55 and 3Cr in Simulated Changqing Oilfield Environment

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(The 11th Oil Production Plant of Changqing Oilfield Branch Petrochina， Qingyang 745000， China)

Received date: 2022-06-21

Revised date: 2022-07-29

Accepted date: 2022-08-31

Online published: 2023-12-27

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摘要

针对油田日益严重的套管腐蚀问题，研究套管腐蚀机理并寻求可供替代的耐蚀材料，是解决套管腐蚀的根本途径。模拟长庆油田现场腐蚀工况，研究了J55、3Cr 2 种材料在CO2分压1.0 MPa、H2S 分压0.3 MPa、温度60 ℃环境中的腐蚀行为，并通过扫描电镜、能谱和X 射线衍射等手段分析了这2 种材料的腐蚀产物形貌和腐蚀产物组分。结果表明:Cr 元素在腐蚀产物膜中的富集及Cr(OH)3的形成，改善了腐蚀产物的稳定性和致密性，从而使3Cr 表现出比J55 更好的抗腐蚀性能。 CO2和H2S 共存环境中，H2S 腐蚀起控制性主导作用。 CO2腐蚀中生成的疏松状腐蚀产物膜，使得J55 和3Cr 的均匀腐蚀速率比在单独H2S 和H2S 与CO2共存环境中的均匀腐蚀速率更高。

关键词： J55 钢; 3Cr 钢; CO2腐蚀; H2S 腐蚀

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李建中, 张发旺, 赵伟轩, 赵海勇, 张立原, 赵幸, 郭倩倩, 魏紫滢, 张峰彬, 丁凯, 李晓亮 . J55、3Cr在模拟长庆油田环境中的CO₂及H₂S腐蚀研究[J]. 材料保护, 2022 , 55(12) : 79 -83 . DOI: 10.16577/j.issn.1001-1560.2022.0342

Abstract

Studying casing corrosion mechanism and seeking alternative corrosion-resistant materials are the fundamental ways to slove the increasingly serious problem of casing corrosion in oilfields. Herein， by simulating the field corrosion conditions of Changqing Oilfield， the corrosion behavior of J55 and 3Cr materials in the environment of a CO2 partial pressure of 1.0 MPa， a H2S partial pressure of 0.3 MPa and a temperature of 60 ℃was studied. Additionally， the morphology and components of the corrosion products of these two materials were analyzed by means of scanning electron microscopy， energy spectroscopy and X-ray diffraction. Results showed that the enrichment of Cr element in the corrosion product film and the formation of Cr(OH)3 improved the stability and compactness of the corrosion products， making 3Cr exhibit better corrosion resistance than J55. In the environment containing both CO2 and H2S， H2S corrosion played a dominant role. The loose corrosion product film formed in CO2 corrosion made the uniform corrosion rates of J55 and 3Cr higher than those in environments containing H2S alone and containing both H2S and CO2.

Key words： J55 steel; 3Cr steel; CO2 corrosion; H2S corrosion

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