超高温下22Cr钢在HCl/HAc溶液中的腐蚀行为研究

高科超, 尚锁贵, 刘平礼, 高强勇, 杜娟, 马金鑫

doi:10.16577/j.issn.1001-1560.2024.0093

材料保护 >

2024 , Vol. 57 >Issue 4: 187 - 193

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0093

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超高温下22Cr钢在HCl/HAc溶液中的腐蚀行为研究

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（1. 中海石油（中国）有限公司天津分公司，天津300480；
2. 西南石油大学油气藏地质及开发工程国家重点实验室，四川成都610500）

刘平礼（1973-），教授，博导，主要从事采油工程教学和压裂酸化方向研究，E-mail：liupingli@vip.163.com

收稿日期: 2023-05-04

修回日期: 2023-08-10

录用日期: 2023-09-10

网络出版日期: 2024-04-30

基金资助

渤中凹陷西南环下古生界灰岩潜山储层深度酸压储层改造工艺研究(CCL2020TJX0NST1298)

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Study on the Corrosion Behavior of 22Cr Steel in HCl/HAc Solution at Ultra-High Temperature

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(1. Tianjin Branch, CNOOC (China) Co., Ltd., Tianjin 300480, China;
2. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China)

LIU Pingli（1973-）, Professor, Doctoral Supervisor, Research Focus: Oil and Gas Production Engineering and Fracturing and Acidizing，E-mail: liupingli@vip.163.com

Received date: 2023-05-04

Revised date: 2023-08-10

Accepted date: 2023-09-10

Online published: 2024-04-30

Supported by

Deep Acid Fracturing Reservoir Stimulation Technology for Lower Paleozoic Limestone Buried Hill Reservoirs in the Southwest Ring of Bozhong Depression(CCL2020TJX0NST1298)

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摘要

酸化是油气开采有效且常规的措施，但酸液会对油气管柱产生严重腐蚀，尤其是在高温储层。为了降低酸液对油气管柱的腐蚀，高温井通常选择有机酸与盐酸复配进行酸化。为了更有效地降低酸化对油气管柱的腐蚀，通过电化学试验和失重试验研究了22Cr钢在多种酸性溶液中的高温(200℃)腐蚀行为。采用扫描电子显微镜(SEM)观察不同体系中钢试样的表面腐蚀形貌，采用X射线能谱仪(EDS)分析腐蚀前后试样表面元素组分及元素分布，采用X射线衍射仪(XRD)分析试样表面的腐蚀产物成分。结果表明，22Cr钢在不同浓度的乙酸溶液中都有良好的耐腐蚀性，但乙酸溶液中增加Cl^-的浓度会加速22Cr钢腐蚀；22Cr钢在低浓度HCl溶液中会产生严重腐蚀；低浓度HCl和低浓度乙酸组成的复合酸液体系会对22Cr钢腐蚀产生协同作用，加速22Cr钢腐蚀；在200℃下，缓蚀剂QASE和缓蚀增效剂Sb₂O₃组成的复合缓蚀剂能够有效抑制22Cr钢在盐酸和乙酸复合酸液中的腐蚀。

关键词： 22Cr钢; 超高温; 腐蚀行为; 协同腐蚀; 复合酸

本文引用格式

高科超, 尚锁贵, 刘平礼, 高强勇, 杜娟, 马金鑫 . 超高温下22Cr钢在HCl/HAc溶液中的腐蚀行为研究[J]. 材料保护, 2024 , 57(4) : 187 -193 . DOI: 10.16577/j.issn.1001-1560.2024.0093

Abstract

Acidizing is an effective and routine measure for oil and gas extraction, but acid liquor can cause severe corrosion to oil and gas pipeline columns, especially in high-temperature reservoirs. The high-temperature wells are often acidified by a combination of organic acids and hydrochloric acid to reduce the corrosion of oil and gas pipeline columns caused by acid. In order to effectively reduce the corrosion of oil and gas pipeline columns caused by acidizing, the high-temperature(200 ℃) corrosion behavior of 22Cr steel in various acidic solutions was studied through electrochemical experiments and weight loss experiments. The surface corrosion morphology of steel samples in different systems was observed using a scanning electron microscope(SEM). An X-ray energy dispersive spectrometer(EDS) was used to analyzed the elemental composition and distribution on the surfaces of samples before and after corrosion. X-ray diffraction(XRD) was utilized to determine the composition of corrosion products on the surface of samples. Results showed that 22Cr steel had good corrosion resistance in different concentrations of acetic acid solution, but the increase in Cl^- concentration in the acetic acid solution accelerated the corrosion of 22Cr steel. 22Cr steel was severely corroded in low-concentration HCl solution. The composite acid liquor system, composed of low concentration HCl and low concentration acetic acid, was found to have a synergistic effect on the corrosion of 22Cr steel and accelerated the corrosion of 22Cr steel. At 200 ℃, the composite inhibitor, composed of corrosion inhibitor QASE and corrosion inhibitor synergist Sb₂O₃, was effectively able to inhibit the corrosion of 22Cr steel in the hydrochloric acid and acetic acid composite acid solution.

Key words： 22Cr steel; ultra-high temperature; corrosion behavior; synergistic corrosion; composite acid

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