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N80钢在模拟减氧空气驱生产井中的腐蚀行为 被引量:1
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作者 周凯丽 史宝成 +4 位作者 薛琨 潘建澎 张兴凯 刘凯 伍丽娟 《热加工工艺》 北大核心 2024年第14期87-92,共6页
为了探究N80钢在减氧空气驱生产井中的腐蚀行为,基于灰色关联分析法,分析了国内某减氧空气驱生产井的腐蚀主控因素,并以油藏模拟结果作为室内模拟参数,采用动态失重法结合金相显微镜、XRD、3D形貌等相关表征,研究了不同生产时期N80钢的... 为了探究N80钢在减氧空气驱生产井中的腐蚀行为,基于灰色关联分析法,分析了国内某减氧空气驱生产井的腐蚀主控因素,并以油藏模拟结果作为室内模拟参数,采用动态失重法结合金相显微镜、XRD、3D形貌等相关表征,研究了不同生产时期N80钢的腐蚀行为。结果表明:氧含量对减氧空气驱生产井腐蚀的敏感性最大,在含氧工况下,N80钢的腐蚀速率显著增加,氧含量3%(0.3 MPa)时的腐蚀速率是不含氧的5倍左右。在驱油初期,腐蚀为CO_(2)主导的局部腐蚀,腐蚀产物主要为致密的FeCO_(3)。随着注气时间的延长,井筒内为CO_(2)/O_(2)均衡环境,腐蚀转变为二者共同作用,腐蚀产物为FeCO_(3)和疏松多孔的Fe_(2)O_(3)。在持续注气3年后,生产井内为高O_(2)+低CO_(2)环境,致密的FeCO_(3)遭到破坏,腐蚀坑横向发展,腐蚀转变为由O_(2)主导的全面腐蚀。 展开更多
关键词 N80钢 减氧空气驱 生产井井筒 灰色关联度分析 O_(2)/CO_(2)腐蚀
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Application Strategy of Scientific Fun Games in Preschool Education of Children
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作者 xuekun 《外文科技期刊数据库(文摘版)教育科学》 2022年第10期005-008,共4页
Playing games is one of the important contents of preschool education, and the application of scientific fun games in preschool education can not only bring fun to children, but also transfer knowledge and cultivate c... Playing games is one of the important contents of preschool education, and the application of scientific fun games in preschool education can not only bring fun to children, but also transfer knowledge and cultivate childrens emotions with the help of games. Therefore, the rational use of scientific fun games is of great significance. For preschool teachers, it is necessary to correctly view the development of scientific fun games, and give scientific education and guidance to children in the games, so as to give full play to the practical value of scientific fun games. 展开更多
关键词 scientific interest GAMES CHILDREN preschool education APPLICATION
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