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Three-Dimensional Finite Element Numerical Simulation and Physical Experiment for Magnetism-Stress Detecting in Oil Casing

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Journal of Ocean University of China 2015年第4期14卷 669-674页

作者： MENG Fanshun ZHANG Jie yang chaoqun YU Weizhe CHEN Yuxi College of Marine Geo-science Ocean University of China Shenzhen Branch Company of China National Offshore Oil Corporation

The casing damage has been a big problem in oilfield production. The current detection methods mostly are used after casing damage, which is not very effective. With the rapid development of China's offshore oil industry, the number of offshore oil wells is becoming larger and larger. Because the cost of offshore oil well is very high, the casing damage will cause huge economic losses. What's more, it can also bring serious pollution to marine environment. So the effective methods of detecting casing damage are required badly. The accumulation of stress is the main reason for the casing damage. Magnetic anisotropy technique based on counter magnetostriction effect can detect the stress of casing in real time and help us to find out the hidden dangers in time. It is essential for us to prevent the casing damage from occurring. However, such technique is still in the development stage. Previous studies mostly got the relationship between stress and magnetic signals by physical experiment, and the study of physical mechanism in relative magnetic permeability connecting the stress and magnetic signals is rarely reported. The present paper uses the ANSYS to do the three-dimensional finite element numerical simulation to study how the relative magnetic permeability works for the oil casing model. We find that the quantitative relationship between the stress' s variation and magnetic induction intensity's variation is: Δδ =K* ΔB, K = 8.04×109, which is proved correct by physical experiment.

关键词： oil casing damage magnetism-stress detecting magnetic anisotropy finite element analysis physical experiment relative magnetic permeability ANSYS three-dimensional numerical simulation

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Post-Orogenic Tectonic Evolution of the Jiangnan-Xuefeng Orogenic Belt:Insights from Multiple Geochronometric Dating of the Mufushan Massif,South China

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Journal of Earth Science 2020年第5期31卷 905-918页

作者： Chuanbo Shen Di Hu Kyoungwon Min chaoqun yang Xiaowei Zeng Hongyang Fu Xiang Ge Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China School of Earth Resources China University of GeosciencesWuhan 430074China Department of Geological Sciences University of FloridaGainesvilleFlorida FL32611USA Department of Geosciences University of PadovaPadova 35137Italy

The Mufushan massif, as continental intra-plate magmatites located in the Jiangnan-Xuefeng orogenic belt of the South China. The Mufushan massif constitutes the largest Mesozoic intrusive complex, intruded the Mesoproterozoic Lengjiaxi Formation. Multiple geochronometric dating was used to reconstruct their evolution from emplacement to exhumation. The Mufushan granitoids were emplaced at ~150 Ma(U-Pb zircon) as post-orogenic magmatites contributing to Triassic crustal thickening. Onset of regional extension at ~128 Ma(40Ar/39Ar white mica and biotite) manifests a tectonic regime switch. Intense exhumation prior to ~55 Ma was followed by slow denudation and peneplanation for the next 37 Ma(~55–18 Ma). Accelerated cooling since ~18 Ma may have been caused by a far-field effect of the collision between IndiaAsia Plate or the Pacific-Plate subduction. Through a multi-geochronometric approach, this study provides a new comprehensive model for the cause of the intra-plate magmatism formation in the South China, and also established a reliable geochronological framework of the post-orogenic tectonic evolutions of the Jiangnan-Xuefeng orogenic belt.

关键词： tectonic evolution 40Ar/39Ar dating apatite fission track (U-Th-Sm)/He dating South China

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Side-channel attack-resistant AES S-box with hidden subfield inversion and glitch-free masking

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Journal of Semiconductors 2021年第3期42卷 60-65页

作者： Xiangyu Li Pengyuan Jiao chaoqun yang Institute of Microelectronics Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Beijing 100084China School of Applied Science Beijing Information Science and Technology UniversityBeijing 100192China

A side-channel attack(SCA)-resistant AES S-box implementation is proposed,which is an improvement from the power-aware hiding(PAH)S-box but with higher security and a smaller *** use the composite field approach and apply the PAH method to the inversion in the nonlinear kernel and a masking method to the other *** addition,a delaymatched enable control technique is used to suppress glitches in the masked *** evaluation results show that its area is contracted to 63.3%of the full PAH S-box,and its power-delay product is much lower than that of the masking *** leakage assessment using simulation power traces concludes that it has no detectable leakage under t-test and that it at least can thwart the moment-correlation analysis using 665000 noiseless traces.

关键词： ASIC side-channel attack AES S-box power-aware hiding glitch-free

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Pre-Drilling Prediction Techniques on the High-Temperature High-Pressure Hydrocarbon Reservoirs Offshore Hainan Island,China

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Journal of Ocean University of China 2018年第1期17卷 72-82页

作者： ZHANG Hanyu LIU Huaishan WU Shiguo SUN Jin yang chaoqun XIE yangbing CHEN Chuanxu GAO Jinwei WANG Jiliang Laboratory of Marine Geophysics and Georesource Institute of Deep-Sea Science and EngineeringChinese Academy of ScienceSanya 572000China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationOcean University of ChinaQingdao 266100China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China Shenzhen Branch of CNOOC Shenzhen 518000China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China

Decreasing the risks and geohazards associated with drilling engineering in high-temperature high-pressure(HTHP) geologic settings begins with the implementation of pre-drilling prediction techniques(PPTs). To improve the accuracy of geopressure prediction in HTHP hydrocarbon reservoirs offshore Hainan Island, we made a comprehensive summary of current PPTs to identify existing problems and challenges by analyzing the global distribution of HTHP hydrocarbon reservoirs, the research status of PPTs, and the geologic setting and its HTHP formation mechanism. Our research results indicate that the HTHP formation mechanism in the study area is caused by multiple factors, including rapid loading, diapir intrusions, hydrocarbon generation, and the thermal expansion of pore fluids. Due to this multi-factor interaction, a cloud of HTHP hydrocarbon reservoirs has developed in the Ying-Qiong Basin, but only traditional PPTs have been implemented, based on the assumption of conditions that do not conform to the actual geologic environment, e.g., Bellotti's law and Eaton's law. In this paper, we focus on these issues, identify some challenges and solutions, and call for further PPT research to address the drawbacks of previous works and meet the challenges associated with the deepwater technology gap. In this way, we hope to contribute to the improved accuracy of geopressure prediction prior to drilling and provide support for future HTHP drilling offshore Hainan Island.

关键词： pre-drilling prediction techniques formation pore pressure high-temperature high-pressure hydrocarbon reservoirs Hainan Island Ying-Qiong Basin

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基于标签多贝努利多传感器组网目标跟踪算法

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系统工程与电子技术 2021年第6期43卷 1541-1546页

作者：胡琪杨超群中国电子科技集团公司第十四研究所江苏南京210000

随着电磁环境的日益复杂,强干扰和高杂波带来的目标低检测概率问题日益突出,给探测系统准确估计监测区域内目标个数以及目标状态带来了新的挑战。针对低检测概率问题,提出随机有限集框架下基于标签多贝努利(labelled multi-Bernoulli,L... 详细信息

随着电磁环境的日益复杂,强干扰和高杂波带来的目标低检测概率问题日益突出,给探测系统准确估计监测区域内目标个数以及目标状态带来了新的挑战。针对低检测概率问题,提出随机有限集框架下基于标签多贝努利(labelled multi-Bernoulli,LMB)多传感器组网目标跟踪算法。该算法首次将LMB框架应用到不同探测范围的多传感器组网目标跟踪场景中,实现了多目标跟踪目标数和相应状态稳定估计。仿真结果表明,所提方法不仅能在低检测概率条件下获得目标稳定的航迹估计,及时捕捉目标新生、消亡等事件,还能有效叠加不同传感器不同探测范围,充分发挥多传感器优势。

关键词：低检测概率标签多贝努利多传感器探测范围

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秭归盆地中新生代构造-热演化的裂变径迹约束

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地学前缘 2017年第3期24卷 116-126页

作者：余武沈传波杨超群中国地质大学(武汉)构造与油气资源教育部重点实验室湖北武汉430074 中国地质大学(武汉)资源学院湖北武汉430074

通过磷灰石裂变径迹年龄的测定以及时间-温度热历史的反演,揭示了秭归盆地中新生代构造-热演化过程。结果表明:秭归盆地自120 Ma左右开始缓慢隆升,主要经历了3个强烈的隆升阶段:(1)晚白垩世100~80 Ma开始强烈隆升,是燕山期造山运动在该... 详细信息

通过磷灰石裂变径迹年龄的测定以及时间-温度热历史的反演,揭示了秭归盆地中新生代构造-热演化过程。结果表明:秭归盆地自120 Ma左右开始缓慢隆升,主要经历了3个强烈的隆升阶段:(1)晚白垩世100~80 Ma开始强烈隆升,是燕山期造山运动在该地区作用的结果,也可能是黄陵背斜晚白垩世强烈抬升向西延伸的响应;(2)晚始新世40 Ma的强烈隆升,可能是印度板块和亚欧板块碰撞初期作用的远程响应;(3)中新世中期到末期10~5 Ma的强烈隆升,是青藏高原东部边界向东扩展及亚洲季风气候变化的响应。秭归盆地内部自白垩纪以来一直隆升剥蚀,展现出与盆地边缘构造-热演化的差异。通过与黄陵背斜东部的当阳盆地构造-热事件的对比,暗示了黄陵背斜在晚白垩世已隆升剥露至地表,分割了两个盆地。晚侏罗世—早白垩世,秦岭大规模挤压变形逆冲推覆构造作用使得米仓山—汉南隆起和黄陵背斜地区成为中上扬子地区磷灰石裂变径迹年龄相对最大的区域,江南—雪峰陆内造山作用向西北方向的扩展使得湘鄂西地区向川东地区磷灰石裂变径迹年龄具有整体变年轻的趋势。晚白垩世以来太平洋板块俯冲挤压效应使得川东褶皱带周缘及川东北磷灰石裂变径迹年龄自南东向北西方向减小,江汉盆地、当阳盆地及龙泉山以西记录的年轻的磷灰石裂变径迹年龄则与青藏高原隆升及其向南东方向构造逃逸的挤压作用和亚洲季风等气候变化的影响有关。

关键词：裂变径迹秭归盆地构造-热演化中新生代中上扬子

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Hydroazidation of Unactivated Alkenes by Visible Light Photoredox Catalysis

Hydroazidation of Unactivated Alkenes by Visible Light Photo...

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中国化学会·第十三届全国物理有机化学学术会议

作者： Juan-Juan Wang chaoqun yang Wei Yu State Key Laboratory of Applied Organic Chemistry Lanzhou University

Olefin azidation constitutes a simple effective means for the preparation of organic azides which have mutifarous applications in organic synthesis and material science. In this context,many studies have been reported...

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Combustion study with synchrotron radiation single- photon ionization technique

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Science Bulletin 2005年第11期50卷 1082-1086页

作者： yang Rui, WANG Jing, HUANG chaoqun, yang Bin, WEI Lixia, SHAN Xiaobin, SHENG Liusi, ZHANG Yunwu & QI Fei National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029,China Correspondence should be addressed to Qi Fei (email:fqi@***) National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei China

Here we report a combustion endstation at National Synchrotron Radiation Laboratory (NSRL) and some primary experimental results. Synchrotron radiation can provide the tunable vacuum ultraviolet (VUV) photon with the high intensity and the good collimation. VUV photoioni-zation is a single-photon ionization process. Combined with molecular-beam mass spectrometry (MBMS), the VUV single-photon ionization can be applied to detect the combustion products, especially the intermediates and free radicals produced from combustion process. This method is proved to be a powerful tool for combustion study, which could be helpful for developing combustion kinetic models and understanding the mechanism of combustion reactions.

关键词： synchrotron radiation VUV single-photon ionization molecular-beam mass spectrometry combustion diagnosis combustion intermediates.

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Combustion optimization by coordinated monitoring of O_2/CO in flue gas

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Electricity 1992年第1期 39-44页

作者： Xu Chuankai Jia chaoqun yang Xun Feng Liqun Xi’an Thermal Power Research Institute,MOE

The major aims combustion engineers all over the worldare striving at are conservation of energy and allevia-tion of environmental pollution,for which the monitoring and controlof the furnace process are of prime importance to attain an optimizedcondition of *** content in flue gas is generallyused as an indicator of whether the right amount of combustion air ***,it cannot directly reflect the degree of perfectionof the combustion process taking place in the *** the otherhand CO is a product of chemical reaction which directly reflects

关键词： combustion Oxygen furnace coordinated attain conservation boiler duets rendering stored

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凹槽销栓型竹-混凝土组合梁的受弯性能

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土木工程学报 2021年第3期54卷 58-67页

作者：魏洋陈思聂玉晗杨超群赵康南京林业大学江苏南京210037

文章将混凝土与竹材组合,提出一种新型凹槽销栓型竹-混凝土组合结构,为研究凹槽销栓型竹-混凝土组合梁的受弯力学性能,对5组组合梁和1组对比竹梁进行四点弯曲试验,试验参数包括连接件间距及其数量,试验主要测试试验荷载、跨中挠度、竹... 详细信息

文章将混凝土与竹材组合,提出一种新型凹槽销栓型竹-混凝土组合结构,为研究凹槽销栓型竹-混凝土组合梁的受弯力学性能,对5组组合梁和1组对比竹梁进行四点弯曲试验,试验参数包括连接件间距及其数量,试验主要测试试验荷载、跨中挠度、竹梁与混凝土翼缘的应变以及竹梁与混凝土翼缘的界面相对滑移。试验结果表明,凹槽销栓型竹-混凝土组合梁的破坏模式表现为两种:第Ⅰ类以混凝土翼缘斜向剪切破坏为控制,脆性特征明显,发生于连接件间距较密时;第Ⅱ类是以凹槽混凝土剪压破坏为控制,发生于连接件间距较疏时,连接件的凹槽内混凝土破损严重,破坏之前有明显的预兆。相对于对比竹梁,组合梁在各级荷载下的跨中位移大幅降低,截面刚度得到大幅度的提高,与对比竹梁相比,组合梁的承载力提高了1.23~1.61倍,对应跨中挠度为L/250和L/300时的荷载PL/250和PL/300平均提高了3.81倍和3.95倍,在正常使用荷载下,凹槽销栓型竹-混凝土组合梁的组合系数为0.86~0.98,组合截面的混凝土和竹材两种材料呈现良好的整体工作状态,凹槽销栓型连接件表现出刚性连接件的特征,具有较高的组合系数。

关键词：竹结构组合结构重组竹混凝土受弯性能

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