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Geostatistical seismic inversion and 3D modelling of metric flow units,porosity and permeability in Brazilian presalt reservoir

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Petroleum Science 2024年第3期21卷 1699-1718页

作者： Rodrigo Penna Wagner Moreira Lupinacci Exploratory Interpretation and Reservoir Characterization Group(GIECAR) Department of Geology and GeophysicsUniversidade Federal FluminenseNiteroiRJ24210-346Brazil Petrobras Rio de JaneiroRJ20031-912Brazil

Flow units(FU)rock typing is a common technique for characterizing reservoir flow behavior,producing reliable porosity and permeability estimation even in complex geological ***,the lateral extrapolation of FU away from the well into the whole reservoir grid is commonly a difficult task and using the seismic data as constraints is rarely a subject of *** paper proposes a workflow to generate numerous possible 3D volumes of flow units,porosity and permeability below the seismic resolution limit,respecting the available seismic data at larger *** methodology is used in the Mero Field,a Brazilian presalt carbonate reservoir located in the Santos Basin,who presents a complex and heterogenic geological setting with different sedimentological processes and diagenetic *** generated metric flow units using the conventional core analysis and transposed to the well log ***,given a Markov chain Monte Carlo algorithm,the seismic data and the well log statistics,we simulated acoustic impedance,decametric flow units(DFU),metric flow units(MFU),porosity and permeability volumes in the metric *** aim is to estimate a minimum amount of MFU able to calculate realistic scenarios porosity and permeability scenarios,without losing the seismic lateral *** other words,every porosity and permeability volume simulated produces a synthetic seismic that match the real seismic of the area,even in the metric *** achieved 3D results represent a high-resolution fluid flow reservoir modelling considering the lateral control of the seismic during the process and can be directly incorporated in the dynamic characterization workflow.

关键词： Flowunits Geostatistical inversion Presalt reservoir 3D reservoir modelling Petrophysical modelling

Microstructure evolution from silicon core to surface in electronic-grade polycrystalline silicon

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Journal of Advanced Dielectrics 2024年第3期14卷 18-26页

作者： Jinyue Peng Yuxuan Yang Yang Zhang Xinlu Xue Bochen Lu Rong Qin Haijun Wu State Key Laboratory for Mechanical Behavior of Materials Electronic Materials Research Laboratory(Key Lab of Education Ministry)and School of Electronic and Information Engineering Xi’an Jiaotong University 710049 Xi’anChina Qinghai Xince Technology Co. Ltd.Huanghe Hydropower Development Co.Ltd.810007 XiningChina Instrumental Analysis Center Xi’an Jiaotong UniversityXi’anChina

Large-size electronic-grade polycrystalline silicon is an important material in the semiconductor industry with broad application ***,electronic-grade polycrystalline silicon has extremely high requirements for production technology and currently faces challenges such as carbon impurity breakdown,microstructure and composition nonuniformity and a lack of methods for preparing large-size mirror-like polycrystalline silicon *** paper innovatively uses physical methods such as wire cutting,mechanical grinding and ion thinning polishing to prepare large-size polycrystalline silicon samples that are clean,smooth,free from wear and have clear crystal *** material was characterized at both macroscopic and microscopic levels using metallographic microscopy,scanning electron microscopy(SEM)with backscattered electron diffraction(EBSD)techniques and scanning transmission electron microscopy(STEM).The crystal structure changes from single crystal silicon core to the surface of the bulk in the large-size polycrystalline silicon samples were revealed,providing a technical basis for optimizing and improving production processes.

关键词： Polysilicon silicon core matrix interface surface metallographic microscopy EBSD

Microstructure of electronic-grade polycrystalline silicon core-matrix interface

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Journal of Advanced Dielectrics 2024年第3期14卷 11-17页

作者： Bochen Lu Yuxuan Yang Yang Zhang Rong Qin Xinlu Xue Jinyue Peng Haijun Wu State Key Laboratory for Mechanical Behavior of Materials Electronic Materials Research Laboratory(Key Lab of Education Ministry)and School of Electronic and Information Engineering Xi’an Jiaotong University 710049Xi’anP.R.China Qinghai Xince Technology Co. Ltd.Huanghe Hydropower Development Co.Ltd.810007XiningP.R.China Instrumental Analysis Center Xi’an Jiaotong University Xi’anP.R.China

This paper focuses on the problems encountered in the production process of electronic-grade polycrystalline *** points out that the characterization of electronic-grade polycrystalline silicon is mainly concentrated at the macroscopic scale,with relatively less research at the mesoscopic and microscopic ***,we utilize the method of physical polishing to obtain polysilicon characterization samples and then the paper utilizes metallographic microscopy,scanning electron microscopy-electron backscatter diffraction technology,and aberration-corrected transmission electron microscopy technology to observe and characterize the interface region between silicon core and matrix in the deposition process of electronic-grade polycrystalline silicon,providing a full-scale characterization of the interface morphology,grain structure,and orientation distribution from macro to ***,the paper illustrates the current uncertainties regarding polycrystalline silicon.

关键词： Polysilicon silicon core matrix interface metallographic microscopy EBSD

气相色谱-质谱法测定电子废品回收件高聚物中的5种十二氯代阻燃剂

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分析科学学报 2024年第2期40卷 206-212页

作者：霍炜江余建龙邵秋荣陈宜浩彭志铿广州海关技术中心广东广州510623 佛山海关综合技术中心广东佛山528303

建立了气相色谱-质谱同时测定电子废品回收件高聚物中灭蚁灵、得克隆602、得克隆603、顺式得克隆以及反式得克隆5种十二氯代阻燃剂的方法。以N-甲基吡咯烷酮(NMP)作为提取液,超声辅助提取方式可使丙烯腈-丁二烯-苯乙烯共聚物(ABS)、聚丙... 详细信息

建立了气相色谱-质谱同时测定电子废品回收件高聚物中灭蚁灵、得克隆602、得克隆603、顺式得克隆以及反式得克隆5种十二氯代阻燃剂的方法。以N-甲基吡咯烷酮(NMP)作为提取液,超声辅助提取方式可使丙烯腈-丁二烯-苯乙烯共聚物(ABS)、聚丙烯(PP)、硅橡胶材质阳性样品溶解,目标物提取率为86.6%~95.3%;聚对苯二甲酸乙二醇酯(PET)材质阳性样品采用微波辅助方式提取,目标物提取率为79.7%~87.0%。提取液经硅胶固相萃取小柱净化,可降低杂质对质谱的干扰。结果表明,5种目标物在0.15~50 mg·L^(-1)浓度范围内与响应值呈较好的线性关系,相关系数均在0.996以上,对4种阳性样品分别重复测定7次,5种目标物的变异系数均在3.1%~7.4%范围内。在空白样品中添加3个浓度水平的标准物质,添加回收率在81.7%~112.2%范围内。该方法灵敏和高效,适用于电子废品高聚物回收件中5种十二氯代阻燃剂含量的测定。

关键词：电子废品回收件高聚物十二氯代阻燃剂气相色谱-质谱法

Ferrofluid magnetoviscous control of wall flow channeling in porous media

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China Particuology 2007年第1期5卷 50-60页

作者： Faal Larachi Damien Desvigne Department of Chemical Engineering Laval University Que. G1K 7P4 Canada

We analyzed the phenomenon of ferrofiuid magnetoviscosity in high-permeability wall-region non-magnetic porous media of the Müller kind. After upscaling the pore-level ferrohydrodynamic model, we obtained a simplified volume-average zero-order axisymmetric model for non-Darcy non-turbulent flow of steady-state isothermal incompressible Newtonian ferrofluids through a porous medium experiencing external constant bulk-flow oriented gradient magnetic field, ferrofluid self-consistent demagnetizing field and induced magnetic field in the solid. The model was explored in contexts plagued by wall flow maldistribution due to low column-to-particle diameter ratios. It was shown that for proper magnetic field arrangement, wall channeling can be reduced by inflating wall flow resistance through magnetovisco-thickening and Kelvin body force density which reroute a fraction of wall flow towards bed core. 　　

关键词： Ferrofluid Magnetosviscosity Porous medium Volume-average ferrohydrodynamic model Kelvin body force Spin-vorticity coupling

FinTech in Taiwan:a case study of a Bank’s strategic planning for an investment in a FinTech company

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Financial Innovation 2016年第1期2卷 186-201页

作者： Jui-Long Hung Binjie Luo Boise State University BoiseUSA Agricultural Bank of China SichuanChina

Introduction:Since 2015 is the year of FinTech in Taiwan,it is worth investigating the challenges that emerged when banks were encouraged to invest in FinTech companies for *** study aims to identify the strategic considerations in the process of searching for FinTech investment *** description:This study used a case study investigation of a top-5 bank in *** major data sources include the meeting notes of the FinTech investment task force and interviews with the team ***-opetition theory was adopted as the theoretical framework and interview questions were derived from the PARTS strategies in co-petition *** results relate to:(1)the strategic goals of FinTech investment,(2)the added value from FinTech companies,(3)criteria in selecting candidates in the same FinTech area,(4)choosing to work as either a cooperator or a competitor,and(5)barriers from policies and *** and evaluation:This study has several findings:(1)regulations and policies shape FinTech’s development;(2)banks,technology companies,and customers are not“FinTech ready;”(3)Compare top-down with bottom up strategies;(4)banks and FinTech companies have complex relationships;(5)it is unlikely that Taiwan will produce FinTech disruptors in the near ***:The findings and discussion can benefit researchers and administrators in finance-related *** studies are desired to observe long-term development in terms of how companies collaborate or compete in specific FinTech areas.

关键词： FinTech Taiwan FinTech Industry Investment in FinTech Bank 3.0 Taiwan bank industry Co-opetition Theory PARTS

Methane-to-chemicals:a pathway to decarbonization

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National Science Review 2023年第9期10卷 56-71页

作者： Nikolai Nesterenko Izabel C.Medeiros-Costa Edwin B.Clatworthy Hugo Cruchade Stanislav V.Konnov Jean-Pierre Dath Jean-Pierre Gilson Svetlana Mintova total Energies One Tech Belgium Zone Industrielle C Laboratoire Catalyse et Spectrochimie(LCS) ENSICAENCNRSNormandie Université

The utilization of methane for chemical production,often considered as the future of petrochemistry,historically could not compete economically with conventional processes due to higher investment *** sustainability and decarbonization of the downstream industry by integration with a methane-to-chemicals process may provide an opportunity to unlock the future for these ***-to-chemicals is an efficient tool to boost the decarbonization potential of renewable *** the current implementation of carbon capture utilization and storage(CCUS) technologies is of great importance for industrial decarbonization,a shift to greener CO2-free processes and CO2utilization from external sources for manufacturing valuable goods is highly *** review outlines potential options for how a methane-to-chemicals process could support decarbonization of the downstream industry.

关键词： methane chemicals pathways decarbonization

Asphaltene aggregation studied by molecular dynamics simulations:role of the molecular architecture and solvents on the supramolecular or colloidal behavior

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Petroleum Science 2019年第3期16卷 669-684页

作者： H.Santos Silva A.Alfarra G.Vallverdu D. Begue B.Bouyssiere I.Baraille Institut des Science Analytiques et Physico-Chimie pour l'Environnement et les Materiaux UMR 5254 CNRS/Univ Pau and Pays Adour 64000 Pau France total Research and Technology BP 2776700 Gonfreville Harfleur France Joint Laboratory C2MC: Complex Matrices Molecular Characterization Total Research and Technology BP 2776700 Gonfreville Harfleur France

Asphaltene aggregation is a subject under vivid discussion:There are several parameters one needs to determine before its behavior can be mastered and better target solutions can be *** nature of asphaltene aggregation(colloidal or supramolecular)and the role of solvents and their mixtures are among the least understood parameters in asphaltene *** paper addresses molecular dynamic simulations to correlate the aggregation properties of asphaltenes,their molecular structure and the concentration of these *** show that the formation of the nanoaggregate depends,primarily,on the size of the conjugated core and on the eventual presence of polar groups capable of forming *** on the conjugated core do not change their shape or type of aggregation but may induce stronger π-π *** macroaggregation formation depends upon the length of the lateral chains of asphaltenes and also on the presence of polar groups at its ***,n-heptane and water may interact selectively with asphaltenes in function of their molecular *** this fact and the aggregation behavior observed,we advocate toward the assumption that a colloidal behavior of asphaltenes might be a particular case of a more general model,based on a supramolecular description.

关键词： Asphaltenes Molecular dynamics Aggregation Heavy oil

Preparation of high emissivity NiCr_2O_4 powders with a spinel structure by spray drying

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International Journal of Minerals,Metallurgy and Materials 2012年第2期19卷 173-178页

作者： Xu-dong Cheng Jie Min Zhen-qi Zhu Wei-ping Ye State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Materials Science and Technology Wuhan University of Technology Wuhan 430070 China

Spray-drying was used to produce the high emissivity NiCr2O4 powders with a spinel structure. Preliminary investigations focused on fabricating the high emissivity powders for infrared radiation coatings and finding the relationship between microstructure and emissivity. The NiCr2O4 powders were characterized for composition, microstructure, and infrared emissivity by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, infrared radiant instrument, and Fourier transform infrared spectra （FT-IR）. Thermogravimetry and differential thermal analysis show that the appropriate baking temperature for NiCr2O4 powder preparation is about 1200？C. The emissivity measurement and FT-IR spectra show that, because of the special spinel structure, the NiCr2O4 powders have a high emissivity about 0.91. Spray-drying is a suitable method to produce the high emissivity ceramic powders.

关键词： emissivity infrared radiation spray drying powders ceramic materials nickel compounds chromium compounds