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Tectono-thermal evolution of the Liwan Sag, deepwater area in the Zhujiang River Mouth Basin, northern South China Sea

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Acta Oceanologica Sinica 2018年第2期37卷 66-75页

作者： TANG Xiaoyin HUANG Shaopeng YANG Shuchun jiang guangzheng JI Mo HU Shengbiao Geothermal and Environmental Research Laboratory Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100049 China CNOOC Research Institute Beijing 100027 China

The Liwan Sag, with an area of 4 000 km-2, is one of the deepwater sags in the Zhujiang River（Pearl River） Mouth Basin, northern South China Sea. Inspired by the exploration success in oil and gas resources in the deepwater sags worldwide, we conducted the thermal modeling to investigate the tectono-thermal history of the Liwan Sag,which has been widely thought to be important to understand tectonic activities as well as hydrocarbon potential of a basin. Using the multi-stage finite stretching model, the tectonic subsidence history and the thermal history have been obtained for 12 artificial wells, which were constructed on basis of one seismic profile newly acquired in the study area. Two stages of rifting during the time periods of 49–33.9 Ma and 33.9–23 Ma can be recognized from the tectonic subsidence pattern, and there are two phases of heating processes corresponding to the *** reconstructed average basal paleo-heat flow values at the end of the rifting events are -70.5 and -94.2 mW/m^2 respectively. Following the heating periods, the study area has undergone a persistent thermal attenuation phase since 23 Ma and the basal heat flow cooled down to -71.8–82.5 mW/m^2 at present.

关键词： tectono-thermal evolution thermal history heat flow deepwater area Liwan Sag

基于多时相热红外遥感的理塘盆地地热资源探测

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断块油气田 2024年第4期31卷 652-660页

作者：屈泽伟李枭胡亚召姜光政左银辉徐小青马亚强四川省地质工程勘察院集团有限公司四川成都610072 成都理工大学能源学院四川成都610059 成都理工大学油气藏地质及开发工程全国重点实验室四川成都610059

地热能是地球内部一种环保、可再生的地下热能,热量传导至地表会引起地表温度异常。然而,地表温度受到太阳辐射、周期性变化和降水等诸多因素的影响,可能掩盖由地热引起的温度异常。为了解决这些问题并突出地热引起的地表温度异常,文中... 详细信息

地热能是地球内部一种环保、可再生的地下热能,热量传导至地表会引起地表温度异常。然而,地表温度受到太阳辐射、周期性变化和降水等诸多因素的影响,可能掩盖由地热引起的温度异常。为了解决这些问题并突出地热引起的地表温度异常,文中提出了一种利用Google Earth Engine(GEE)高效快速计算多时相冬季平均地表温度并提取地热异常的方法,并对理塘盆地的地热资源分布特征进行了研究。该方法综合运用多时相冬季平均地表温度对比分析、水体剔除、地形效应抑制等手段来提取地热异常区。结果表明,文中确定的8处地热异常区与断裂构造关系密切,且区内水资源丰富,具备地热资源形成的良好条件,可以作为未来地热勘探的重点方向。研究认为,在高原恶劣环境中,利用多时相平均冬季地表温度识别地热异常是一种高效且经济的方法。

关键词：地热资源多时相热红外遥感地表温度 GEE 理塘盆地

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燃气轮机拉杆转子抗弯刚度分析

机电设备 2024年第5期41卷 118-123页

作者：赵博潘渤杨青姜广政张恒阚选恩西安热工研究院有限公司西安710054 西安西热节能技术有限公司西安710054 西安理工大学机械与精密仪器工程学院西安710048

为提高计算效率,发展了一种计算抗弯刚度的简便算法。该算法利用接触压力在接触面上近似线性分布的特点,在给定的总体预紧力及弯矩情况下,计算得到接触面上法向应力及分布,结合轮盘的结构特点采用平截面假设,求出抗弯刚度的修正系数,再... 详细信息

为提高计算效率,发展了一种计算抗弯刚度的简便算法。该算法利用接触压力在接触面上近似线性分布的特点,在给定的总体预紧力及弯矩情况下,计算得到接触面上法向应力及分布,结合轮盘的结构特点采用平截面假设,求出抗弯刚度的修正系数,再乘以连续模型的抗弯刚度就可得到界面分离时的抗弯刚度。采用简化算法得到的抗弯刚度与三维有限元接触算法计算结果相差在5.8%以内,计算所需时间为后者的1%,证明了本算法的高效性;以某F级重型燃气轮机转子为例,综合考虑了界面局部分离和粗糙度对转子整体刚度的影响,并研究了预紧松弛对转子固有频率的影响。

关键词：拉杆转子抗弯刚度有限元法非连续界面

Catalog of Enhanced Geothermal Systems based on Heat Sources

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Acta Geologica Sinica(English Edition) 2021年第6期95卷 1882-1891页

作者： KONG Yanlong PAN Sheng REN Yaqian ZHANG Weizun WANG Ke jiang guangzheng CHENG Yuanzhi SUN Wenjie ZHANG Chao HU Shengbiao HE Lijuan Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science CASBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of Tibetan Plateau Research of the Chinese Academy of Sciences Beijing 100085China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China College of Energy Chengdu University of TechnologyChengdu 610059China

It is common sense that a deeper well implies higher temperature in the exploration of deep geothermal resources, especially with hot dry rock(HDR) geothermal resources, which are generally exploited in terms of enhanced geothermal systems(EGS). However, temperature is always different even at the same depth in the upper crust due to different heat sources. This paper summarizes the heat sources and classifies them into two types and five sub-types: crustorigin(partial melting, non-magma-generated tectonic events and radiogenic heat production), and mantle-origin(magma and heat conducted from the mantle). A review of global EGS sites is presented related to the five sub-types of heat sources. According to our new catalog, 71% of EGS sites host mantle-origin heat sources. The temperature logging curves indicate that EGS sites which host mantle-origin magma heat sources have the highest temperature. Therefore, high heat flow(>100 m W/m^(2)) regions with mantle-origin magma heat sources should be highlighted for the future exploration of EGS. The principle to identify the heat source is elucidated by applying geophysical and geochemical methods including noble gas isotope geochemistry and lithospheric thermal structure analysis. This analytical work will be helpful for the future exploration and assessment of HDR geothermal resources.

关键词： geothermal resources enhanced geothermal systems heat source hot dry rock catalog

Tectonic subsidence of the Zhu I Sub-basin in the Pearl River Mouth Basin, northern South China Sea

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Frontiers of Structural and Civil Engineering 2017年第4期11卷 729-739页

作者： Xiaoyin TANG Shuchun YANG Junzhang ZHU Zulie LONG guangzheng jiang Shaopeng HUANG Shengbiao HU Geothermal and Environmental Research Laboratory Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China CNOOC Research Institute Beijing 100027 China Shenzhen Branch of China National Offshore Oil Corporation Ltd Guangzhou 510240 China Department of Earth and Environmental Sciences University of Michigan Ann Arbor MI 48109-1005 USA

The Pearl River Mouth Basin, which is situated on the northern margin of the South China Sea, has attracted great attention not only because of its tectonic setting but also because of its abundant hydrocarbon resources. We have analyzed the Cenozoic tectonic subsidence history of 4 drilled wells and 43 artificial wells from the Zhu 1 Sub-basin of the Pearl River Mouth Basin by back-stripping, using newly interpreted seismic profiles. We also calculated the average tectonic sub- sidence rates of the four sags in the Zhu 1 Sub-basin. The rifting and post-rifting stages are separated by abrupt changes in the tectonic subsidence curves and average subsidence rates. In the eastem sags of the Zhu 1 Sub- basin, tectonic subsidence started to slow at ca. 30 Ma, compared with ca. 23.8 Ma in the western sags. This probably corresponds to the timing of break-up and suggests that tiffing in the Pearl River Mouth Basin ended earlier in the eastern sags than in the western sags. Anomalously accelerated tectonic subsidence occurred at 17.5-16.4 Ma during the post-tiffing stage, with average subsidence rates as high as 301.9 m/Myr. This distin- guishes the Pearl River Mouth Basin from classical Atlantic passive continental marginal basins, which demonstrate exponentially decaying post-rift tectonic subsidence.

关键词： tectonic subsidence Zhu 1 Sub-basin back-stripping Pearl River Mouth Basin South China Sea

超临界二氧化碳高低齿梳齿密封动力稳定性研究

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摩擦学学报 2021年第1期41卷 115-124页

作者：尹露张万福姜广政潘渤李春上海理工大学能源与动力工程学院上海200093 上海市动力工程多相流动与传热重点实验室上海200093 西安热工研究院有限公司陕西西安710054

建立超临界二氧化碳(supercritical carbon dioxide,SCO_(2))高低齿梳齿密封三维数值计算模型,应用基于微元理论的密封动特性识别方法,研究凸台宽度及密封间隙对超临界二氧化碳梳齿密封动静特性的影响,并与传统梳齿密封进行对比.研究表... 详细信息

建立超临界二氧化碳(supercritical carbon dioxide,SCO_(2))高低齿梳齿密封三维数值计算模型,应用基于微元理论的密封动特性识别方法,研究凸台宽度及密封间隙对超临界二氧化碳梳齿密封动静特性的影响,并与传统梳齿密封进行对比.研究表明:高低齿梳齿密封的交叉复合刚度系数对有效阻尼系数影响较小,主阻尼对其占主要影响.在低涡动频率下(<160 Hz),传统梳齿密封动力稳定性较好;而涡动频率高于160 Hz时,高低齿梳齿密封的有效阻尼系数约为传统梳齿密封的105%~113%;且存在1个最佳凸台宽度使密封系统稳定性最好(本文最佳值为5.13 mm);随着密封间隙的减小,有效阻尼系数的大小与频率依赖性分别增大、增强.高低齿梳齿密封泄漏量较传统梳齿密封降低约45.5%;凸台宽度5.13 mm、密封间隙0.4 mm时较原始模型(b=4 mm、c2=0.5 mm)泄漏量分别降低约5%和19%,高低齿梳齿密封泄漏量随密封间隙的减小而降低.

关键词：高低齿梳齿密封计算流体力学超临界二氧化碳泄漏特性动力稳定性

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扇贝阻尼密封动力学特性研究

中国电机工程学报 2020年第21期40卷 6982-6990页

作者：尹露张万福姜广政曹浩李春上海理工大学能源与动力工程学院上海市杨浦区200093 西安热工研究院有限公司陕西省西安市710054 国网湖南省电力有限公司电力科学研究院湖南省长沙市410007

增强阻尼特性是解决传统密封结构引起的系统不稳定问题的有效方法之一。建立扇贝阻尼密封三维数值模型,应用多频涡动方法求解密封动力特性系数,对比分析扇贝、袋型及迷宫密封在无/有进口预旋工况下的密封动力特性及泄漏特性。研究表明:... 详细信息

增强阻尼特性是解决传统密封结构引起的系统不稳定问题的有效方法之一。建立扇贝阻尼密封三维数值模型,应用多频涡动方法求解密封动力特性系数,对比分析扇贝、袋型及迷宫密封在无/有进口预旋工况下的密封动力特性及泄漏特性。研究表明:扇贝阻尼密封的周向挡板及扇贝结构使密封腔内气流周向速度下降,转子系统稳定性提升。无进口预旋时,扇贝阻尼密封的直接阻尼系数、有效阻尼系数较袋型阻尼密封最高约提升14.7%、12.5%,约为迷宫密封的36倍、17倍,扇贝阻尼密封有更优的动力稳定性,且其腔室最佳错开角度为37.5°。进口预旋增加使扇贝阻尼密封与袋型阻尼密封的有效阻尼系数频率依赖性升高。扇贝阻尼密封的泄漏量略高于迷宫密封,低于袋型阻尼密封。提高进口预旋时,扇贝阻尼密封泄漏量降低。

关键词：扇贝阻尼密封动力学特性稳定性有效阻尼系数计算流体力学

AlphaFold-guided redesign of a plant pectin methylesterase inhibitor for broad-spectrum disease resistance

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Molecular Plant 2024年第9期17卷 1344-1368页

作者： Yeqiang Xia guangzheng Sun Junhua Xiao Xinyi He Haibin jiang Zhichao Zhang Qi Zhang Kainan Li Sicong Zhang Xuechao Shi Zhaoyun Wang Lin Liu Yao Zhao Yuheng Yang Kaixuan Duan Wenwu Ye Yiming Wang Suomeng Dong Yan Wang Zhenchuan Ma Yuanchao Wang Department of Plant Pathology Nanjing Agricultural UniversityNanjingJiangsu 210095China Key Laboratory of Soybean Disease and Pest Control(Ministry of Agriculture and Rural Affairs) Nanjng Agricultural UniversityNanjngJiangsu 210095China Anhui Province Key Laboratory of Crop Integrated Pest Management Anhui Agricultural UniversityHefei 230036China School of Bioengineering Dalian University of TechnologyDalian 116024China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBejing 100193China These authors contributed equally to the article.

Plant cell walls are a critical site where plants and pathogens continuously struggle for physiological *** we show that dynamic remodeling of pectin methylesterification of plant cell walls is a compo-nent of the physiological and co-evolutionary struggles between hosts and pathogens.A pectin methyles-terase(PsPME1)secreted by Phytophthora sojae decreases the degree of pectin methylesterification,thus synergizing with an endo-polygalacturonase(PsPG1)to weaken plant cell *** counter PsPME1-mediated susceptibility,a plant-derived pectin methylesterase inhibitor protein,GmPMl1,protects pectin to maintain a high methylesterification ***1 protects plant cell walls from enzymatic degrada-tion by inhibiting both soybean and *** pectin methylesterases during ***,constitutive expression of GmPMl1 disrupted the trade-off between host growth and defense *** therefore used AlphaFold structure tools to design a modified form of GmPMI1(GmPMI1R)that specifically targets and inhibits pectin methylesterases secreted from pathogens but notfrom *** expression of GmPMi1R enhanced plant resistance to oomycete and fungal *** summary,our work highlights the biochemical modification of the cell wall as an important focal point in the physiological and co-evolutionary conflict between hosts and microbes,providing an important proof of concept that Al-driven structure-based tools can accelerate the development of new strategies for plant protection.

关键词： apoplastic immunity AlphaFold-guided redesign broad-spectrum disease resistance pectin methyl-esteraseinhibitor cell wall

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雄安新区现今地温场特征及成因机制

地球物理学报 2019年第11期62卷 4313-4322页

作者：王朱亭张超姜光政胡杰唐显春胡圣标中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 中国科学院大学北京100049 中国科学院地球科学研究院北京100029 中国地质科学院北京100037

雄安新区位于渤海湾盆地冀中坳陷内,区内主要包含有牛驼镇凸起、容城凸起、高阳低凸起等次级构造单元.通过分析该区最近实测的8口钻井测温曲线和108块岩石热导率实测数据并结合前人的研究成果,对雄安新区内部地温梯度、大地热流分布规... 详细信息

雄安新区位于渤海湾盆地冀中坳陷内,区内主要包含有牛驼镇凸起、容城凸起、高阳低凸起等次级构造单元.通过分析该区最近实测的8口钻井测温曲线和108块岩石热导率实测数据并结合前人的研究成果,对雄安新区内部地温梯度、大地热流分布规律等进行了分析.结果表明雄安新区内部不同构造单元地层的地温梯度在垂向上可划分为两段:上部沉积盖层段,地温梯度值在25.2~58.9℃·km-1.之间;下部白云岩段地温梯度较低,主要在5℃·km-1.附近.同时地温梯度在平面上具有明显的区域性特征,牛驼镇凸起地温梯度值最高,范围为46.5~58.9℃·km-1.;容城凸起区地温梯度次之,范围在32.0~40.9℃·km-1.之间;凹陷及低凸起区地温梯度较低,唯一的实测值显示为25.2.℃·km-1..通过搜集的热流值绘制的热流图也显示出凸起区热流值高,凹陷区热流值相对较低的特点.雄安新区较高的现今地温场特征与其处于弧后拉张的构造背景相关.同时,基岩地层凹凸相间的格局、砂泥质盖层直接覆盖在碳酸盐地层之上的地层组合、热储层段内的地下水对流作用、断裂的发育等共同造成了雄安新区较高的现今地温场特征.

关键词：雄安新区钻井测温曲线岩石热导率现今地温场特征