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Directional migration behavior of cerium during sintering process of mischmetal doped cemented carbide 被引量:4
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作者 张立 陈述 +2 位作者 熊湘君 余贤旺 王元杰 《Journal of Central South University of Technology》 EI 2008年第1期6-10,共5页
Three observation methods were used to investigate the existing form and the behavior of rare earth during the sintering process of high activity mischmetal (RE, with lanthanum and cerium) doped WC-8%Co-0.048%RE(ma... Three observation methods were used to investigate the existing form and the behavior of rare earth during the sintering process of high activity mischmetal (RE, with lanthanum and cerium) doped WC-8%Co-0.048%RE(mass fraction) alloy with low carbon-containing level by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXS), considering the fact that the addition amount of rare earth in the alloy is very minute. The directional migration process and mechanism of cerium were discussed. First, the sinter skin (surface) is observed. oxide on the sinter skin, and lanthanum in these cerium observed, and lanthanum containing phase/micro-zone in It is shown that there exists a dispersedly distributed cerium containing enrichment positions is very minute. Secondly, the polished section is the alloy is identified. Finally, based on the fact that the fracture of cemented carbide is resulted from the heterogeneous phase or other defects within the microstructure, the fracture surface is observed and cerium containing phase/micro-zone in the fracture source approximately 260 μm from the surface is identified. These combined observations reveal adequately the fact that lanthanum and cerium get separated and cerium predominantly migrates towards the surface during the sintering process. 展开更多
关键词 cemented carbide rare earth surface segregation directional migration liquid phase sintering
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Migration behavior and aggregation mechanism of SiC particles in silicon melt during directional solidification process
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作者 Yue Yang Shi-qiang Ren +3 位作者 Da-chuan Jiang Zhi-qiang Hu Yi Tan Peng-ting Li 《China Foundry》 SCIE CAS 2021年第6期550-556,共7页
SiC inclusions in a multicrystalline silicon ingot have a negative effect on the performance of solar cells.The migration behavior and aggregation mechanism of SiC particles in the silicon melt during the directional ... SiC inclusions in a multicrystalline silicon ingot have a negative effect on the performance of solar cells.The migration behavior and aggregation mechanism of SiC particles in the silicon melt during the directional solidification process was studied.Results show that SiC particles collide and aggregate in the melt due to the effect of melt flow.Larger aggregation of SiC particles is easily deposited at the bottom of the melt,whereas smaller SiC particles are pushed to the top of melt.Meanwhile,the particles migrate to the edge of melt under the effect of electromagnetic force.Furthermore,the enrichment region of SiC particles can be controlled by adjusting the temperature field distribution of the melt.With an increase of the melt temperature,the SiC particles are enriched at the top of the silicon ingot,indicating that SiC particles can be effectively separated from silicon. 展开更多
关键词 polycrystalline silicon SIC directional solidification migration
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Effects of direct current electric field on corrosion behaviour of copper, Cl- ion migration behaviour and dendrites growth under thin electrolyte layer 被引量:11
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作者 黄华良 潘志权 +1 位作者 郭兴蓬 邱于兵 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第1期285-291,共7页
Effect of direct current electric field (DCEF) on corrosion behaviour of copper printed circuit board (PCB-Cu), Cl-ion migration behaviour, dendrites growth under thin electrolyte layer was investigated using pote... Effect of direct current electric field (DCEF) on corrosion behaviour of copper printed circuit board (PCB-Cu), Cl-ion migration behaviour, dendrites growth under thin electrolyte layer was investigated using potentiodynamic polarization and scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS). Results indicate that DCEF decreases the corrosion of PCB-Cu;Cl-ions directionally migrate from the negative pole to the positive pole, and enrich on the surface of the positive pole, which causes serious localized corrosion; dendrites grow on the surface of the negative pole, and the rate and scale of dendrite growth become faster and greater with the increase of external voltage and exposure time, respectively. 展开更多
关键词 COPPER DENDRITES migration direct current electric field thin electrolyte layer copper printed circuit board
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Direct pre-stack depth migration on rugged topography
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作者 周竹生 陈高祥 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第9期2736-2742,共7页
Engineering seismic exploration aims at shallow imaging which is confused by statics if the surface is uneven. Direct pre-stack depth migration (DPDM) is based on accurate elevations of sources and receivers, by whi... Engineering seismic exploration aims at shallow imaging which is confused by statics if the surface is uneven. Direct pre-stack depth migration (DPDM) is based on accurate elevations of sources and receivers, by which static correction is completely abandoned before migration and surely the imaging quality is remarkably improved. To obtain some artificial shot gathers, high-order staggered-grid finite-difference (FD) method is adapted to model acoustic wave propagation. Since the shot gathers are always disturbed by regular interferences, the statics still must be applied to supporting the interference elimination by apparent velocity filtering method. Then all the shot gathers should be removed back to their original positions by reverse statics. Finally, they are migrated by pre-stack reverse-time depth migration and imaged. The numerical experiments show that the DPDM can ideally avoid the mistakes caused by statics and increase imaging precision. 展开更多
关键词 undulating topography seismic modeling static correction apparent velocity filtering direct pre-stack depth migration
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Engineering Cu_(2)O/Cu/N-C interface to induce directional migration of charge for driving photocatalytic homo-coupling of terminal alkynes
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作者 Xiaoqin Yan Tianyi Xu +8 位作者 Wenwen Zhan Yang Yang Yang Yu Jianjian Yi Xiaoxiao He Lei Yang Jianwei Zhao Liming Sun Xiguang Han 《Nano Research》 SCIE EI CSCD 2024年第8期6895-6902,共8页
The efficient utilization of visible light catalysts for organic reactions necessitates not only the effective separation of photogenerated electrons and holes to participate in the reaction,but also their ability to ... The efficient utilization of visible light catalysts for organic reactions necessitates not only the effective separation of photogenerated electrons and holes to participate in the reaction,but also their ability to form key intermediates with reactant molecules.The present study successfully synthesized a crusiform-like mesoporous structure of nitrogen-doped carbon-coated Cu_(2)O/Cu(Cu_(2)O/Cu/N-C)with a Cu_(2)O/dual electron acceptor interface using etched HKUST-1 as the precursor.A series of theoretical and experimental studies have demonstrated that the Cu_(2)O/Cu/N-C interface in the photocatalytic homo-coupling of terminal alkynes not only effectively enhances the separation of photogenerated electron−hole pairs,but also facilitates the formation of the key intermediate[Cu_(2)O/Cu/N-C]-phenylacetylide and promotes the rearrangement of its internal charges.As a result,the homo-coupling reaction can be effectively facilitated.The primary reason for the functional role of Cu_(2)O/Cu/N-C interface lies in the downward bending of energy band from Cu_(2)O to N-doped C layers,induced by the different work functions of Cu_(2)O,Cu and N-doped C layers.Consequently,Cu_(2)O/Cu/N-C photocatalysts demonstrate exceptional photocatalytic activity in the homo-coupling reaction of terminal alkynes under blue-light irradiation and air atmosphere.The present study presents a novel research methodology for the development of highly efficient visible light catalysts to facilitate organic reactions in future applications. 展开更多
关键词 photocatalysis homo-coupling of terminal alkynes directional migration of charges heterojunction interface Cu_(2)O carbon coated
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Influences of labor migration on rural household land transfer:A case study of Sichuan Province,China 被引量:5
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作者 XU Ding-de CAO Sha +1 位作者 WANG Xu-xi LIU Shao-quan 《Journal of Mountain Science》 SCIE CSCD 2018年第9期2055-2067,共13页
The influence of labor migration on rural household land transfer has been hotly debated in academic circles, which focuses on whether part-time employment leads to land transfer. Using survey data on rural households... The influence of labor migration on rural household land transfer has been hotly debated in academic circles, which focuses on whether part-time employment leads to land transfer. Using survey data on rural households in the Sichuan Province, and applying the theoretical framework of new economics of labor migration, this study explores the influences of labor migration on the direction and scale of land transfer from the perspective of rural household structure. The results indicate that: 1) the quantity of laborers has significant influence on the direction and scale of land transfer. The larger the on-farm labor variable(Labor), the lesser the possibility that land will be rented-out and the amount of land rented out will also be smaller. In addition, there is a greater probability that land will be rented-in and the amount of land rented-in will be greater. 2) The greater the ratio of off-farm laborers to rural household laborers(Off-farm) the greater the possibility that land will be rented-out. In addition the higher the ratio of on-farm laborers to the total household laborers(On-farm), the larger the possibility that land will be rented-in. Meanwhile, if the household has individuals at the age of 64 or older(Old) who are engaged in agriculture, there is a smaller possibility that land will be rentedout. 3) the ratio of part-time laborers to rural household laborers(Pluriactivity) have significant inverse U-shaped influences on the rent-in of land as well as the amount of land rented-in. The inflection points are 33.27% and 14.10%, respectively. Such findings confirm the significance of this study in better understanding the influence of labor migration on rural household land transfer. 展开更多
关键词 Labor migration Part-time employment Land transfer direction Land transfer scale Ruralarea Sichuan Province
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Migration-associated secretion of melanoma inhibitory activity at the cell rear is supported by KCa3.1 potassium channels 被引量:3
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作者 Jennifer Schmidt Kristin Friebel +2 位作者 Roland Schoenherr Marc G Coppolino Anja-Katrin Bosserhoff 《Cell Research》 SCIE CAS CSCD 2010年第11期1224-1238,共15页
Malignant melanoma, characterized by invasive local growth and early formation of metastases, is the most aggressive type of skin cancer. Melanoma inhibitory activity (MIA), secreted by malignant melanoma cells, int... Malignant melanoma, characterized by invasive local growth and early formation of metastases, is the most aggressive type of skin cancer. Melanoma inhibitory activity (MIA), secreted by malignant melanoma cells, interacts with the cell adhesion receptors, integrins a4131 and 05131, facilitating cell detachment and promoting formation of me- tastases. In the present study, we demonstrate that MIA secretion is confined to the rear end of migrating cells, while in non-migrating cells MIA accumulates in the actin cortex. MIA protein takes a conventional secretory pathway including coat protein complex I (COPI)- and coat protein complex II (COPII)-dependent protein transport to the cell periphery, where its final release depends on intracellular Ca2+ ions. Interestingly, the Ca2+-activated K+-channel, subfamily N, member 4 (KCa3.1), known to be active at the rear end of migrating cells, was found to support MIA secretion. Secretion was diminished by the specific KCa3.1 channel inhibitor TRAM-34 and by expression of dominant- negative mutants of the channel. In summary, we have elucidated the migration-associated transport of MIA protein to the cell rear and also disclosed a new mechanism by which KCa3.1 potassium channels promote cell migration. 展开更多
关键词 MIA protein KCa3.1 potassium channel migration directed transport regulated secretion
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Guiding the migration of grafted cells to promote axon regeneration
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作者 Xiao-bing Yuan Christopher Haas Itzhak Fischer 《Neural Regeneration Research》 SCIE CAS CSCD 2016年第8期1224-1225,共2页
A promising therapeutic strategy to promote the regeneration of injured axons in the adult central nervous system(CNS)is the transplantation of cells or tissues that can modify the local host environment and support... A promising therapeutic strategy to promote the regeneration of injured axons in the adult central nervous system(CNS)is the transplantation of cells or tissues that can modify the local host environment and support the growth of regenerating axons. 展开更多
关键词 grafted migration regeneration injured Schwann olfactory embryonic chains directional Chase
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地下盐岩溶腔储库单井水平溶解建造流体运移研究
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作者 李超 梁卫国 +2 位作者 张胜利 肖宁 李静 《地下空间与工程学报》 CSCD 北大核心 2024年第4期1257-1265,1297,共10页
为提高水平盐穴储库单井后退式溶腔建腔速率,通过相似模型试验与数值计算开展建腔期注水方向对腔内流体运移规律影响研究。数值模拟结果表明:注入淡水接触腔内卤水后浓度会迅速升高,当浓度达到23%左右变为缓慢升高;上下同时入射有利于... 为提高水平盐穴储库单井后退式溶腔建腔速率,通过相似模型试验与数值计算开展建腔期注水方向对腔内流体运移规律影响研究。数值模拟结果表明:注入淡水接触腔内卤水后浓度会迅速升高,当浓度达到23%左右变为缓慢升高;上下同时入射有利于快速溶腔,垂直向下入射有利于建造更大腔体。相似模型试验流体运移规律与数值模拟基本一致,证明了数值模型的正确性。试验发现:腔内流体主要分为羽流区、边界溶解区、对流扩散区和底部饱和区4个区域;改变注水方向使羽流区流体浓度和流速改变,进而影响边界溶解区高度,与水平入射相比,垂直向上入射、上下型入射、四周型入射和垂直向下入射高度增加了22.2%、26.9%、51.1%、135.6%;改变注水方向使淡水初始向下流速改变,进而改变底部饱和区高度,与水平入射相比,垂上、四周、上下、垂下入射高度降低0%、12.9%、29.9%、70.1%。 展开更多
关键词 盐岩水平溶腔 注水方向 流体运移 溶解速率 后退式建腔
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直接甲醇燃料电池阳极催化剂的失活机制及应对策略
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作者 郭鹏 李红伟 +3 位作者 李贵贤 季东 王东亮 赵新红 《化工进展》 EI CAS CSCD 北大核心 2024年第7期3812-3823,共12页
甲醇氧化电催化剂是决定直接甲醇燃料电池(direct methanol fuel cells,DMFC)性能与成本的关键。目前,铂基催化剂是最有前途的高效甲醇氧化电催化剂,但在反应过程中存在活性位的迁移、团聚与浸出、中毒以及载体的腐蚀与坍塌等原因引起... 甲醇氧化电催化剂是决定直接甲醇燃料电池(direct methanol fuel cells,DMFC)性能与成本的关键。目前,铂基催化剂是最有前途的高效甲醇氧化电催化剂,但在反应过程中存在活性位的迁移、团聚与浸出、中毒以及载体的腐蚀与坍塌等原因引起的失活问题,阻碍了其进一步商业化发展。如何提高直接甲醇燃料电池阳极催化剂的稳定性是一个亟待解决的难题。本文首先总结了甲醇的电氧化原理和催化反应机理,详细综述了阳极催化剂的失活机制以及抑制改善其失活方面所取得的研究进展。最后对该领域未来的发展方向进行了展望,并指出利用限域作用限制活性金属的迁移和聚集,构建多元合金,设计增强复合型载体,将理论研究和原位表征技术相结合,是今后开发更高效、稳定阳极催化剂的重点研究方向。 展开更多
关键词 直接甲醇燃料电池 阳极催化剂 失活机制 金属粒子的迁移、团聚与浸出 载体腐蚀与坍塌
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一种基于粗网格的多算子模拟成像方法
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作者 宋坤 孙成禹 +2 位作者 刘童 蔡瑞乾 黄宏宇 《石油地球物理勘探》 EI CSCD 北大核心 2024年第5期1012-1021,共10页
对于已知速度模型,传统的叠前深度偏移成像方法都是以快速获得高精度偏移剖面为目的。基于成像算子的模拟叠前深度偏移成像方法无需进行波场正演和偏移处理便可快速得到偏移结果,但成像算子却是根据单一散射点散射向量构建的,只能对散... 对于已知速度模型,传统的叠前深度偏移成像方法都是以快速获得高精度偏移剖面为目的。基于成像算子的模拟叠前深度偏移成像方法无需进行波场正演和偏移处理便可快速得到偏移结果,但成像算子却是根据单一散射点散射向量构建的,只能对散射点附近的局部区域进行精准模拟成像。为了提高直接模拟成像结果的可靠性和兼顾直接模拟成像计算效率高的优势,先在粗网格离散原速度模型的前提下建立粗点扩散算子,在波数域对粗点扩散算子进行不同插值方法测试,测试不同尺寸粗网格以及不同插值方法对模拟成像结果的影响。在此基础上,又提出一种多算子协同模拟成像,设置多个局部偏移成像窗,每个窗内布置散射点并求取射线路径,分区构建较为精准的控制局部成像的成像算子,使模拟成像结果能更好地体现观测系统对不同区域的理论成像结果的影响。该方法不仅保留了快速成像的高计算效率,同时得到控制局部成像的成像算子,可以模拟不同区域在同一观测系统的理论模拟成像结果,并检测观测系统对全局成像的影响,可以直接展示观测系统对不同区域理论成像的控制。 展开更多
关键词 直接模拟成像 粗网格 插值点扩散算子 多算子协同 局部偏移成像窗
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Community Perception of Riparian Corridors Ecosystem Services and Implications for Environmental Education in Upper Oueme Catchment in Benin, West Africa
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作者 Socrate Mercator Dossou Kinnoumè Serge Adomou +1 位作者 Gérard Nounagnon Gouwakinnou Thierry Dèhouégnon Houéhanou 《Open Journal of Ecology》 2024年第2期125-147,共23页
The assessment of the local community perception of the value of riparian corridors is relevant to understand their attitude towards the conservation of such ecosystem. We conducted a semi-structured survey on the per... The assessment of the local community perception of the value of riparian corridors is relevant to understand their attitude towards the conservation of such ecosystem. We conducted a semi-structured survey on the perception and importance attributed to the ecosystem services (ESs) provided by riparian corridors in 368 households across 70 villages located in a buffer zone of 5 km of servitude around the permanent rivers of the Upper Oueme watershed in Benin. We found that local communities easily reported provisioning and cultural ESs than regulating and supporting ones, indicating their misunderstanding of the main role of riparian corridor. Moreover, the supply of cropping areas was perceived as the most important ES. Educated respondents and high-income households had more knowledge of regulating ESs and supporting ESs, respectively. Overall, the highly perceived importance of the provision of cropping areas indicates a potential risk of agricultural encroachment of riparian corridors. We suggest the consideration of the current local perception of riparian corridor’s role in designing a sound environmental education aiming at the change of local population’s perception. This perception shift will promote a sustainable management of the riparian corridors. 展开更多
关键词 Local Knowledge direct Use Value Soil Formation migration Importance Value BENIN
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温度梯度下Zr晶界迁移的分子动力学研究
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作者 冷恩贵 金娜 杨劼人 《四川冶金》 CAS 2024年第4期53-57,共5页
定向退火技术广泛应用于提升高温合金综合性能,其构建温度梯度环境驱动晶界定向迁移,获得性能优异的柱状晶组织。然而,不同晶界的迁移能力差异较大,对柱状晶组织的形成造成阻碍。为了更好的调控定向退火工艺,本研究采用分子动力学方法对... 定向退火技术广泛应用于提升高温合金综合性能,其构建温度梯度环境驱动晶界定向迁移,获得性能优异的柱状晶组织。然而,不同晶界的迁移能力差异较大,对柱状晶组织的形成造成阻碍。为了更好的调控定向退火工艺,本研究采用分子动力学方法对α-Zr中多个晶界在温度梯度下的迁移行为进行研究,归纳不同晶界在迁移过程中能量变化特征与迁移行为之间的规律,阐明超额势能与预熔温度等因素影响晶界迁移的机理。研究发现,原子势能越高则迁移激活焓越低,预熔温度越低则驱动力越大,晶界越容易发生迁移。这一发现可为解释温度梯度环境下晶粒的异常长大与晶界的停止迁移提供理论依据,为更好调控此类合金微观组织、获得均匀柱状晶提供理论参考。 展开更多
关键词 晶界迁移 定向退火 超额自由能 晶界预熔 分子动力学模拟
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预约、限定与激励:我国农村订单定向医学生免费培养的政策引导回流分析
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作者 周勇 李诗薇 李旭 《卫生软科学》 2024年第11期85-89,94,共6页
基于劳动力回流迁移理论与政策功能构建分析框架,分析我国农村订单定向医学生免费培养的政策引导回流机制。结果发现,引导回流机制的运作逻辑在于政策功能及其力的作用,预约功能(拉力牵引)、限定功能(规制力约束)与激励功能(引力驱动)... 基于劳动力回流迁移理论与政策功能构建分析框架,分析我国农村订单定向医学生免费培养的政策引导回流机制。结果发现,引导回流机制的运作逻辑在于政策功能及其力的作用,预约功能(拉力牵引)、限定功能(规制力约束)与激励功能(引力驱动)共同促成定向医学生的回流。但政策功能下的引导回流机制也存在不足,表现为预约对象回流动力与农村地区牵引力不足、回流限定条件与医学生自我发展相悖、回流激励措施与定向医学生权益错位。需围绕定向医学生契约遵守、主体选择、专业保障等方面,不断完善政策功能定位发挥作用力,优化引导回流机制增强运作效用,确保定向医学生如期回流并长期扎根农村。 展开更多
关键词 农村订单定向医学生 免费培养模式 人口迁移 引导回流机制 政策功能
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The application and view of the geochemistry theory in direct coal liquefaction technique 被引量:1
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作者 Xiaohong XIA Yong QIN 《Chinese Journal Of Geochemistry》 EI CAS 2006年第B08期55-55,共1页
关键词 地球化学 液化现象 迁移
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四川盆地元坝气田长兴组古原油的运移方向与聚集特征 被引量:2
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作者 李平平 魏广鲁 +3 位作者 徐祖新 李毕松 彭雨晴 邹华耀 《地学前缘》 EI CAS CSCD 北大核心 2023年第6期277-288,共12页
元坝气田的长兴组天然气主要为原油裂解气。研究古原油的运移方向与聚集特征,对于分析从古油藏到现今气藏的演化过程以及揭示现今气-水界面的分布特征,从而指导元坝气田及邻区的天然气勘探与开发具有重要意义。本文利用流体包裹体确定... 元坝气田的长兴组天然气主要为原油裂解气。研究古原油的运移方向与聚集特征,对于分析从古油藏到现今气藏的演化过程以及揭示现今气-水界面的分布特征,从而指导元坝气田及邻区的天然气勘探与开发具有重要意义。本文利用流体包裹体确定了古原油的充注时间,恢复了原油充注期的储层顶面构造形态,并以此为基础模拟了古原油的运移路径;然后利用储层沥青的烷基二苯并噻吩类分子标志物示踪了古原油的运移方向;最后分析了古原油的聚集特征与油气藏的演化过程。结果表明:(1)长兴组储层发育较多的沥青包裹体,与之伴生的盐水包裹体的均一温度为110~130℃,结合地层埋藏史和温度演化史确定的古原油充注的时间为晚三叠世到早侏罗世;(2)古原油充注期的长兴组顶面形态继承了长兴组沉积期的顶面形态,台地边缘的礁滩处于相对高部位,而礁后滩处于相对低部位;(3)数值模拟显示古原油从台地边缘斜坡向台地边缘的礁滩圈闭侧向运移,储层沥青的烷基二苯并噻吩比值也沿着运移方向逐渐降低,表明古原油具有侧向运移特点;(4)位于相对高部位的台地边缘礁滩圈闭的古原油充满度高,而位于相对低部位的礁后滩圈闭的古原油充满度低。综合来看,元坝气田的古原油具有近源充注、在相对高部位的台地边缘礁滩圈闭聚集的特征;对经历高热演化的古油藏而言,烷基二苯并噻吩类化合物在古原油的运移方向示踪方面具有一定潜力。 展开更多
关键词 烷基二苯并噻吩 固体沥青 古原油运移方向 长兴组 元坝气田 四川盆地
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黔西北富锗银铅锌矿集区成矿流体运移方向及其制约因素
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作者 王明志 韩润生 +2 位作者 吴顺川 张艳 刘飞 《大地构造与成矿学》 EI CAS CSCD 北大核心 2023年第5期953-968,共16页
黔西北矿集区作为川滇黔富锗铅锌多金属成矿区的重要组成部分,成矿条件优越,找矿潜力巨大。已有研究表明,该区铅锌矿床成矿时代为印支晚期,但对成矿流体运移方向的研究相对薄弱,这也直接影响到区内资源勘查部署。在综合剖析该矿集区典... 黔西北矿集区作为川滇黔富锗铅锌多金属成矿区的重要组成部分,成矿条件优越,找矿潜力巨大。已有研究表明,该区铅锌矿床成矿时代为印支晚期,但对成矿流体运移方向的研究相对薄弱,这也直接影响到区内资源勘查部署。在综合剖析该矿集区典型矿床的矿体特征、成矿温度、同位素组成和成矿年龄等资料的基础上,本文划分成矿流体类型,系统总结铅锌成矿作用过程中与成矿流体运移相关的“行迹”标志,研判成矿流体在区域尺度的运移方向,进一步讨论流体运移的制约因素。研究表明,在黔西北富锗银铅锌矿集区,构造为成矿流体运移提供了主要的驱动力和通道,成矿构造的优势方位决定成矿流体的主体运移方向。成矿温度、同位素组成和成矿构造等方面的区域性变化特征均指示成矿流体在平面上主体从南东至北西方向运移;除印支期陆块碰撞作用导致古特提斯洋闭合的因素外,雪峰山陆内变形构造作用也可能为成矿流体运移提供了动力,进而控制了流体的运移方向。该研究不仅对黔西北矿集区的“战略性”铅锌找矿部署具有现实意义,而且为热液矿床成矿流体运移方向研究提供了路径。 展开更多
关键词 成矿流体 运移方向 区域勘查部署 制约因素 黔西北矿集区
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东部凹陷沙三段天然气输导体系与运移方向
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作者 王群一 《承德石油高等专科学校学报》 CAS 2023年第6期20-24,共5页
东部凹陷位于辽河探区东部,面积3300 km^(2),长约140 km,宽18~30 km,基底最大埋深7000 m,是一个相对发育较晚的凹陷,呈狭长不对称的双断“V”字型凹陷结构,斜坡基底坡度很大,古近系向上倾方向超覆很快,凹陷内多期火山活动强烈,规模较大... 东部凹陷位于辽河探区东部,面积3300 km^(2),长约140 km,宽18~30 km,基底最大埋深7000 m,是一个相对发育较晚的凹陷,呈狭长不对称的双断“V”字型凹陷结构,斜坡基底坡度很大,古近系向上倾方向超覆很快,凹陷内多期火山活动强烈,规模较大,蕴藏着丰富的天然气资源,天然气总资源量为1435×10^(8)m^(3),气油资源量当量比为0.15,是辽河油田三个主要产油气凹陷中最高的。具有多套聚集天然气的目的层系,常规天然气储层类型以碎屑岩为主,此外,古潜山变质岩储层和火山岩储层也是重要勘探领域,深层气勘探以沙三期浊积砂体为重点,而泥页岩和煤层也是页岩气和煤层气的赋存体。 展开更多
关键词 东部凹陷 输导体系 成藏机理 运移方向
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地层水判断油气运移方向方法研究
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作者 毛振强 《石化技术》 CAS 2023年第12期144-147,共4页
储层内流体势是判定油气运移的重要依据。主要分析了东营凹陷内地层水的矿化度和水型的分布规律,指出其与油藏圈闭保存条件密切相关。异常高压是油气运移的重要动力,是流体势大小的重要指标,高势区的部位往往是油气源区,可以提供流体运... 储层内流体势是判定油气运移的重要依据。主要分析了东营凹陷内地层水的矿化度和水型的分布规律,指出其与油藏圈闭保存条件密切相关。异常高压是油气运移的重要动力,是流体势大小的重要指标,高势区的部位往往是油气源区,可以提供流体运移的动力,油气运移由高势点向低势点运移。通过对流体势低势区的分析,可以预测有利的油气聚集区,东营凹陷由此形成油气藏围绕主要生烃中心呈“环带状”分布的格局。利用地层水化学变化规律和地层压力变化趋势可以判断油气运聚方向。 展开更多
关键词 地层水 地层压力 流体势 运移方向 油气成藏 东营凹陷
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鄂尔多斯盆地南缘延安组降解油砂地球化学特征及油源分析
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作者 梁也 单玄龙 +4 位作者 何月顺 宋英旭 张慧娟 冯灿翔 许庆鹏 《东北石油大学学报》 CAS 北大核心 2023年第5期49-60,I0004,共13页
为完善鄂尔多斯盆地边缘地区油源认识,研究渭北隆起区延安组降解油砂地球化学特征和油源,通过GC-MS(气相色谱—质谱分析)等测试,分析油砂的有机质成熟度、有机质来源、古沉积环境和油源方向。结果表明:渭北隆起区延安组油砂油的成分中... 为完善鄂尔多斯盆地边缘地区油源认识,研究渭北隆起区延安组降解油砂地球化学特征和油源,通过GC-MS(气相色谱—质谱分析)等测试,分析油砂的有机质成熟度、有机质来源、古沉积环境和油源方向。结果表明:渭北隆起区延安组油砂油的成分中以饱和烃为主,非烃和沥青质次之,芳香烃最少,饱芳比和饱和烃质量分数高,油砂油品质较好;油砂油进入成熟阶段,有机质来源于高等植物和藻类,形成于水体盐度低、水体缺氧的湖相沉积环境;延长组7段半深湖—深湖相沉积的泥页岩是油砂的生油岩,油砂油由镇泾地区沿南东东方向运移,水洗和生物降解作用是运移过程中影响油砂油成分变化的主要因素。该结果对鄂尔多斯盆地南缘油气勘探有指导意义。 展开更多
关键词 渭北隆起区 延安组油砂 地球化学特征 油源 运移方向 鄂尔多斯盆地
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