多元热流体注采用N80钢管柱的腐蚀行为
Corrosion Behavior of N80 Steel Tube for Multiple Thermal-Fluid Injection
摘 要
通过多元热流体注采现场井下挂环表面腐蚀产物形貌和成分的分析,提出了N80钢管柱的腐蚀机理,并通过现场失效管柱的成分分析进行验证;用实验室模拟腐蚀试验研究了多元热流体温度(120~280 ℃)、CO2分压(2~18 MPa)和O2分压(0~1 MPa)对管柱腐蚀行为的影响。结果表明:管柱的腐蚀反应分为CO2腐蚀、O2腐蚀和氢腐蚀3类,现场失效管柱碳含量低于标准要求,验证了腐蚀机理的正确性。随着温度升高,管柱的腐蚀速率先增大后减小再增大;随着CO2分压增大,腐蚀速率先基本不变后增大再趋于稳定;随着O2分压增大,腐蚀速率先急剧增大后趋于稳定。
N80钢管柱
挂环
腐蚀机理
multiple thermal-fluid
N80 steel tube
hanging ring
corrosion mechanism
Abstract
The corrosion mechanism of N80 steel tube was proposed through the analysis of morphology and composition of corrosion products on surface of hanging rings at multiple thermal-fluid injection site, and was verified by the composition analysis of the failed tube at site. The effect of temperature (120-280 ℃) of multiple thermal-fluid, CO2 partial pressure (2-18 MPa) and O2 partial pressure (0-1 MPa) on the corrosion behavior of the tube was studied by laboratory simulation corrosion tests. The results show that the corrosion reaction of the tube included CO2 corrosion, O2 corrosion and hydrogen corrosion. The carbon content of the failed tube at site was lower than the standard requirements, verifying the correctness of the corrosion mechanism. With increasing temperature, the corrosion rate of the tube increased first, then decreased and then increased. With increasing CO2 partial pressure, the corrosion rate basically unchanged, then increased and then stabilized. With increasing O2 partial pressure, the corrosion rate sharply increased first and then stabilized.
中图分类号 TG147 DOI 10.11973/jxgccl202305004
所属栏目 试验研究
基金项目 国家自然科学基金重点项目(51734010,51334003);国家自然科学基金联合基金资助项目(U22B2072,U22B6003);国家自然科学基金重大科研仪器研制项目(52227804);中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项项目(ZLZX2020-01);国家自然科学基金青年科学基金资助项目(52104012)
收稿日期 2022/2/27
修改稿日期 2023/3/28
网络出版日期
作者单位点击查看
备注刘金璐(1995-),男,山西临汾人,博士研究生
引用该论文: LIU Jinlu,LI Jun,LI Li,LI Fu,LI Hui,YANG Hongwei,LIAN Wei. Corrosion Behavior of N80 Steel Tube for Multiple Thermal-Fluid Injection[J]. Materials for mechancial engineering, 2023, 47(5): 20～25
刘金璐,李军,李丽,李甫,李辉,杨宏伟,连威. 多元热流体注采用N80钢管柱的腐蚀行为[J]. 机械工程材料, 2023, 47(5): 20～25
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【10】YUAN J T,ZHU K F,JIANG J J,et al.Corrosion behavior of Cr-bearing steels in CO2-O2-H2O multi-thermal-fluid environment[J].Materials Research Express,2020,7(10):106518.
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【12】朱春明,刘刚芝,董社霞,等.温度对3Cr钢在CO2-O2环境中腐蚀的影响[J].钢铁研究学报,2019,31(6):573-581. ZHU C M,LIU G Z,DONG S X,et al.Effect of temperature on corrosion of 3Cr steel in CO2-O2 environment[J].Journal of Iron and Steel Research,2019,31(6):573-581.
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【19】唐晓旭,马跃,孙永涛.海上稠油多元热流体吞吐工艺研究及现场试验[J].中国海上油气,2011,23(3):185-188. TANG X X,MA Y,SUN Y T.Research and field test of complex thermal fluid huff and puff technology for offshore viscous oil recovery[J].China Offshore Oil and Gas,2011,23(3):185-188.
【20】李杉.大庆油田徐深气田耐CO2腐蚀套管优选[J].石油钻探技术,2016,44(6):55-59. LI S.Casing optimization for CO2 corrosion resistance in the Xushen gas field[J].Petroleum Drilling Techniques,2016,44(6):55-59.
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