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Orthogonal analysis of water model study on the optimization of flow control devices in a six-strand tundish

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Journal of university of science and technology beijing 2007年第2期14卷 118-124页

作者： Zhengyan Wei yanping Bao jianhua {2. Wenxu Gong Baoming Wang Metallurgical and Ecological engineering school University of Science and Technology Beijing Beijing 100083 China Tianjin Iron ＆ Steel Co. Ltd. Tianjin 300180 China

Improper flow control devices in a multi-strand tundish can cause some problems, for example, liquid steel cannot reach every nozzle at the same time and the liquid steel in nozzles far away from the entry zone has a lower temperature. The water model experiment of a six-strand tundish of Tianjin Iron ＆ Steel Co. Ltd. was performed, a new ＂U＂ type baffle was obtained, and its parameters were defined by perpendicular analysis. The ＂U＂ baffle can not only improve those imperfections, but also prolong the residence time of nonmetallic inclusions, which is good for their flotation and separation.

关键词： six-strand tundish water model flow control devices optimization

Distribution and segregation of dissolved elements in pipeline slab

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Journal of university of science and technology beijing 2007年第3期14卷 212-218页

作者： jianhua liu {2. Bao Xian Dong Taiquan Li Yi Ren Shuai Zhang Metallurgical and Ecological engineering school University of Science and Technology Beijing Beijng 100083 China technology Center of ANSC Angang Steel Company Limited Anshan 114001 China

The chemical composition in a cross section of a high grade pipeline slab was measured point by point （in a scale of 1 μm） using original position statistic distribution analysis （OPA）. The result indicated that negative segregation strips of Si, Mn, Mo, Ni, Cr, Nb, Cu, Ti, and V exist in the two sides 2. mm away from the central line, with a width of 8-12.mm, Negative segregation inside the central line is more severe than that outside the central line, and the highest positive segregation of the elements appears closely by the inner sides of the negative segregation strips. No obvious negative segregation strip of S and P is found. Segregation of the elements in the central area is higher than that in the outer and inner arc areas. The segregation of C, Ti, S, and P is high and that of Cr, Cu, Si, and Mn is low in the slab.

关键词： original position statistic distribution analysis (OPA) segregation negative segregation pipeline

川东北营山平昌地区凉高山组页岩天然裂缝发育特征及其形成演化模式研究

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地学前缘 2024年第5期31卷 17-34页

作者：何建华曹红秀邓虎成印长海朱彦平李厂李勇尹帅成都理工大学能源学院四川成都610059 页岩油气富集机理与高效开发全国重点实验室北京102206 油气藏地质及开发工程全国重点实验室(成都理工大学) 四川成都610059 大庆油田有限责任公司勘探开发研究院黑龙江大庆163000 西安石油大学地球科学与工程学院陕西西安710065

川东北营山平昌地区侏罗系凉高山组页岩油气显示活跃且多口井获得工业油气流,其油气资源勘探潜力巨大,而侏罗系页岩油气的富集程度及开发效果受控天然裂缝特征明显。本文综合利用野外、成像、岩心、薄片和CT扫描等多尺度裂缝表征手段,... 详细信息

川东北营山平昌地区侏罗系凉高山组页岩油气显示活跃且多口井获得工业油气流,其油气资源勘探潜力巨大,而侏罗系页岩油气的富集程度及开发效果受控天然裂缝特征明显。本文综合利用野外、成像、岩心、薄片和CT扫描等多尺度裂缝表征手段,并结合脉体包裹体、碳氧同位素、岩石声发射和脉体U-Pb定年实验测试,重点揭示了研究区不同尺度天然裂缝的发育特征,明确了不同成因天然裂缝的形成期次并构建了其演化力学模式。结果表明:凉高山组页岩主要发育剪切缝、层面滑移缝、层理缝和流体超压缝等力学成因裂缝;构造变形区以发育NW和NE向高角度剖面剪切缝和网状张剪复合缝为主,裂缝密度高,纵向穿层规模大;平稳稳定区主要发育层理缝和流体超压缝及少量近EW和NNE向平面剪切缝,密度低,多充填。侏罗系主要经历了4个天然裂缝形成期:燕山早—中期(170~140 Ma)侏罗系快速埋藏形成以近SN和NE向垂直或水平的水力超压裂缝为主,纤维状方解石全充填;燕山晚期(100~80 Ma)发育NNE与近EW共轭平面剪切裂缝、NE向扩张缝和生烃超压缝;喜马拉雅早—中期(67~32.Ma)持续发育平面剪切缝、NW向剖面剪切缝和张性缝,以及层理缝;喜马拉雅晚期(15~6 Ma)表现为先存裂缝的活化和新生成少量近NNE向张性缝。受喜马拉雅晚期应力调整,早期形成近EW和NW向剪切缝开启有效,新生成的NNE向张性缝未充填较有效。该研究对于侏罗系多期构造复合下有效裂缝的定量预测和页岩油气富集有利区优选提供了重要支撑。

关键词：页岩储层天然裂缝形成演化有效性凉高山组营山平昌地区