海上油气田油套管用材110Cr13S 适用性研究

蒋东雷, 余 意, 王 恒, 刁 欢, 肖 谭, 王应好

doi:10.16577/j.issn.1001-1560.2023.0168

材料保护 >

2023 , Vol. 56 >Issue 7: 105 - 109

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0168

试验研究

海上油气田油套管用材110Cr13S 适用性研究

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中海石油(中国) 有限公司湛江分公司，广东湛江 524057

余意(1988-)，工程师，主要研究方向为海洋钻完井工艺，电话:18607595984，E-mail:yuyi2＠cnooc.com.cn

收稿日期: 2023-01-26

修回日期: 2023-02-15

录用日期: 2023-03-16

网络出版日期: 2023-08-23

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Study on Applicability of Oil Casing Material 110Cr13S for Offshore Oil and Gas Fields

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Zhanjiang Branch Company，CNOOC(China) Co.，Ltd.，Zhanjiang 524057，China

Received date: 2023-01-26

Revised date: 2023-02-15

Accepted date: 2023-03-16

Online published: 2023-08-23

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摘要

为评价110Cr13S 油套管钢在海上油气田开发工程中的适用性，采用暴露腐蚀试验、原位电化学测试、应力腐蚀测试研究了110Cr13S 钢在模拟深水油气田井下高温、高压、CO2与H2S 共存腐蚀环境中的腐蚀行为。利用扫描电镜、能谱仪、电化学工作站、慢应变速率拉伸试验机测试了110Cr13S 油套管钢在温度为129.5 ℃，H2S 分压为358 Pa 以及CO2分压为2.754 MPa 条件下的腐蚀形貌、腐蚀产物成分、电化学行为及慢应变速率拉伸曲线。结果表明:在模拟深海油气田井况条件下，110Cr13S 钢的平均腐蚀速率为0.004 4 mm/a，试样表面生成了结构致密完整的钝化膜，具有较好的耐蚀性和优异的抗硫化物应力腐蚀开裂性能，110Cr13S 油套管钢适用于深水、高温、高压、CO2与H2S 共存条件下的油气井开发油套管选材。

关键词： 海上油气田; 油套管; 腐蚀; 选材

本文引用格式

蒋东雷, 余意, 王恒, 刁欢, 肖谭, 王应好 . 海上油气田油套管用材110Cr13S 适用性研究[J]. 材料保护, 2023 , 56(7) : 105 -109 . DOI: 10.16577/j.issn.1001-1560.2023.0168

Abstract

In order to evaluate the applicability of 110Cr13S oil casing steel in offshore oil and gas field development projects，the corrosion behavior of 110Cr13S steel in simulated high temperature，high pressure，CO2 and H2S coexisting corrosion environments under well of deep water oil and gas fields was studied using exposure corrosion tests，in-situ electrochemical tests，stress corrosion tests.Scanning electron microscopy，energy spectrometer，electrochemical workstation，slow strain rate tensile testing machine were used to study the corrosion morphology，corrosion product composition，electrochemical behavior and slow strain rate tensile curves of 110Cr13S oil casing steel under the conditions of 129.5 ℃，H2S partial pressure of 358 Pa and CO2 partial pressure of 2.754 MPa.Results showed that the average corrosion rate of 110Cr13S steel was 0.004 4 mm/a under the simulated deep sea oil and gas field well conditions，and a dense and complete passivation film was formed on the surface of the sample，which presented good corrosion resistance and excellent resistance to sulfide stress corrosion cracking.Therefore，110Cr13S oil casing steel was suitable for selecting oil casing materials for oil and gas well development under conditions of deep water，high temperature，high pressure，CO2 and H2S coexisting conditions.

Key words： offshore oil and gas field; oil casing; corrosion; materials selection

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