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Investigation of feasibility of alkali-cosolvent flooding in heavy oil reservoirs

Petroleum Science 2023年第3期20卷 1608-1619页

作者： Yi-Bo Li He-fei Jia Wan-Fen pu Bing Wei Shuo-Shi Wang Na Yuan State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina Mewbourne School of Petroleum and Geological Engineering University of OklahomaNormanOK73019USA

Cold production is a challenge in the case of heavy oil because of its high viscosity and poor fluidity in reservoir ***-cosolvent-polymer flooding is a type of microemulsion flooding with low costs and possible potential for heavy oil ***,the addition of polymer may cause problems with injection in the case of highly viscous ***,in this study the feasibility of alkali-cosolvent(AC)flooding in heavy oil reservoirs was investigated via several groups of *** interfacial tension between various AC formulations and heavy crude oil was measured to select appropriate *** behavior tests were performed to determine the most appropriate formulation and conditions for the generation of a *** flooding experiments were carried out to investigate the displacement efficiency of the selected Ac *** results showed that the interfacial tension between an AC formulation and heavy oil could be reduced to below 1o-3 mN/m but differed greatly between different types of cosolvent.A butanol random polyether series displayed good performance in reducing the water-oil interfacial tension,which made it possible to form a Type Il microemulsion in reservoir *** to the results of the phase behavior tests,the optimal salinity for different formulations with four cosolvent concentrations(0.5 wt%,1 wt%,2 wt%,and 3 wt%)was 4000,8000,14000,and 20000 ppm,*** results of rheological measurements showed that Type Ill microemulsion had a viscosity that was ten times that of *** results of sandpack flooding experiments showed that,in comparison with waterflooding,the injection of a certain Ac formulation slug could reduce the injection *** pressure gradient during waterflooding and AC flooding was around 870 and 30-57 kPa/m,*** the addition of an AC slug,the displacement efficiency was 30%-50%higher than in the case of waterflooding.

关键词： Heavy oil Microemulsion Cold production Chemical flooding Displacement efficiency

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Multiferroicity and giant in-plane negative Poisson’s ratio in wurtzite monolayers

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npj Computational Materials 2022年第1期8卷 489-499页

作者： Zhuang Ma pu Huang Jin Li Peng Zhang Jiaxin Zheng Wen Xiong fei Wang Xiuwen Zhang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen University518060ShenzhenChina School of Advanced Materials Peking UniversityShenzhen Graduate School518055ShenzhenChina Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences400714ChongqingChina School of Physics and Microelectronics Zhengzhou University450001ZhengzhouChina

Monolayers of layered materials,such as graphite and molybdenum dichalcogenides,have been the focus of materials science in the last ***,we reveal benign stability and intriguing physical properties in the thinnest monolayer wurtzite(wz)semiconductors,which can be exfoliated from their bulk and stacked to reform the wz *** candidate ZnX and CdX(X=S,Se,Te)monolayers possess low cleavage energy and direct bandgaps,which harbor strongly coupled ferroelectricity and ferroelasticity with low transition barriers,giant in-plane negative Poisson’s ratio,as well as giant Rashba spin splitting,enabling the co-tunability of spin splitting and auxetic magnitudes via multiferroic *** wz monolayers can be used as building blocks of devices structures,due to their inherent“self-healable”capacity,which offer more flexibility for semiconductor fabrication and provide a natural platform to probe the interplay of multiple physical effects,bringing light into the rich physics in tetrahedral semiconductors.

关键词： plane splitting molybdenum

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Rapid mass loss and disappearance of summer-accumulation type hanging glacier

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Advances in Climate Change Research 2022年第1期13卷 73-81页

作者： Chun-Hai XU Zhong-Qin LI fei-Teng WANG pu-Yu WANG Jian-Xin MU State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences.Lanzhou730000China National Cryosphere Desert Data Center Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China

Hanging glaciers hold the absolute dominant number in West China and their changes had important influences on local hydrology,sea-level rise and natural hazards(snow/ice avalanches).However,logistic and operational difficulties have resulted in the lack of in-situ-measured data,leaving us with poor knowledge of the changing behaviors of this type of ***,we presented the spatiotemporal pattern of seasonal and annual mass changes of a mid-latitude hanging glacier in the Tien Shan based on repeated terrestrial laser scanning(TLS)surveys during the period *** distributed glacier surface elevation changes exhibited highly spatiotemporal variability,and the winter elevation changes showed slight surface lowering at the upper elevations and weak thickening at the glacier terminus,which was contrary to altitudinal elevation changing patterns at the summer and annual *** balance processes of the hanging glacier mainly occurred during summer and the winter mass balance was nearly balanced(-0.10±0.15 m w.e.).The glacier exhibited more rapid mass loss than adjacent other morphological glacier and the estimated response time of the glacier to climate change was very short(6-9 years),indicating hanging glaciers will experience rapid wastage and disappearance in the future even with climate change mitigation.

关键词： Hanging glaciers Mass balance processes Glacier disappearance Tien Shan Climate change

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早发未服药精神分裂症青少年丘脑皮质环路的异常静息态功能连接

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中国临床心理学杂志 2024年第2期32卷 247-251页

作者：蔡艳张曼琪潘韵致张雯谭文剑向勇慧吴国伟刘哲宁张劲强蒲唯丹杨飞龙中南大学精神卫生研究所长沙410011 湖南省脑科医院长沙410007 华南师范大学心理学院广州510631 中南大学湘雅三医院临床心理科长沙410013

目的:探讨未服药早发精神分裂症青少年丘脑-皮质环路的静息状态下功能连接异常。方法:对61例未服药早发精神分裂症青少年及55例匹配的健康对照进行静息状态下的脑功能扫描。选择16个丘脑分区为种子点,比较两组丘脑到全脑的功能连接的差... 详细信息

目的:探讨未服药早发精神分裂症青少年丘脑-皮质环路的静息状态下功能连接异常。方法:对61例未服药早发精神分裂症青少年及55例匹配的健康对照进行静息状态下的脑功能扫描。选择16个丘脑分区为种子点,比较两组丘脑到全脑的功能连接的差异。结果:与健康对照相比,未服药早发精神分裂症青少年丘脑与双侧中央前回、双侧中央后回、双侧颞中回等感觉运动区连接显著上升;与双侧纹状体、左侧杏仁核、左侧前扣带回、右侧眶额部皮质以及左侧小脑连接显著下降。结论:感觉运动区-丘脑的连接上升,可能是精神分裂症的核心表现之一;青少年患者中显著下降的杏仁核/扣带回-丘脑连接则与其特有的临床表现密切相关。

关键词：精神分裂症丘脑-皮质环路功能连接青少年静息状态

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φ40 mm孔径下爆炸应力波衰减特性试验研究

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工程爆破 2024年第2期30卷 27-33页

作者：毛羽侯超普徐士超周俊杰陈作彬李飞陈顺禄刘迪国网新源山西大同抽水蓄能有限公司山西大同037000 核工业南京建设集团有限公司南京211102

为了研究爆炸应力波在基岩中的传播和衰减规律,利用不同标号的混凝土代替不同等级围岩,对φ40 mm孔径下不同装药结构的工况进行爆破试验。通过制作及预埋PVDF薄膜传感器,测量6种装药结构下不同距离处的爆炸应力峰值,探究不同药量、不同... 详细信息

为了研究爆炸应力波在基岩中的传播和衰减规律,利用不同标号的混凝土代替不同等级围岩,对φ40 mm孔径下不同装药结构的工况进行爆破试验。通过制作及预埋PVDF薄膜传感器,测量6种装药结构下不同距离处的爆炸应力峰值,探究不同药量、不同岩石性质对爆炸应力波传播的影响。通过试验得到了C20、C30、C40混凝土试件在试验所涉及的范围内爆炸应力波随传播距离衰减的指数关系式。试验结果表明随着介质波阻抗的增大,该介质内部的爆炸应力波衰减系数会增大的规律,同时也验证了利用PVDF传感器测量混凝土内部的爆炸应力峰值这一方法是可行的,测试数据是可靠的,对后续不同岩土介质下的应力衰减规律研究和工程应用有一定的指导意义。

关键词：爆炸应力波爆破试验混凝土试件 PVDF传感器

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Swansea criteria score in acute fatty liver of pregnancy

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Chinese Medical Journal 2022年第7期135卷 860-862页

作者： Jianbo Tan fei Hou Haofeng Xiong Lin pu Pan Xiang Chuansheng Li Intensive Care Unit Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China

To the Editor:Acute fatty liver of pregnancy(AFLP)is an uncommon but potentially fatal disease unique to pregnancy that typically occurs in the third trimester and is one of the leading causes of maternal mortality in critically ill patients.^([1])The Swansea diagnostic criteria have been widely used in the diagnosis of AFLP worldwide since their *** Swansea criteria include clinical symptoms and laboratory tests,imaging,and pathological examination results.

关键词： pregnancy diagnosis Acute

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pH-dependent corrosion initiation behavior induced by inclusions of low alloy steel in simulated marine environments

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Journal of Iron and Steel Research(International) 2023年第10期30卷 2067-2079页

作者： Heng Ma Zhong-xue Wang Yue Liu Yue-xiang Wang Teng-fei Wang Qing-pu Zhang Zhong-yu Cui Yinshan Section Steel Corporation of Laiwu Steel Group Ltd. Jinan 271104ShandongChina School of Materials Science and Engineering Ocean University of ChinaQingdao 266100ShandongChina

The initial pitting corrosion behavior triggered by inclusions in S420 low alloy steel in acidic artificial seawater(ASW)and weak-alkaline ASW was *** geometric data of the corrosion pits formed in the ASW with different pH were *** pH of the ASW has an obvious influence on the pit *** pits in acidic ASW exhibit a funnel shape,while those in weak-alkaline ASW present a cone shape with a larger pit *** reason for the difference in the morphology and size of the corrosion pits induced by inclusion is that it is easier to trigger micro-galvanic corrosion in different structures and different areas of the pits in the acidic environment.

关键词： Low alloy steel Inclusion Pitting corrosion Micro-galvanic corrosion

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SPAGINS:semiempirical parameterization for fragments in gamma-induced nuclear spallation

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Nuclear Science and Techniques 2023年第12期34卷 112-122页

作者： Hui‑Ling Wei Meng‑Die Zhou pu Jiao Yu‑Ting Wang Jie pu Kai‑Xuan Cheng Ya‑fei Guo Chun‑Yuan Qiao Gong‑Tao Fan Hong‑Wei Wang Chun‑Wang Ma Institute of Particle and Nuclear Physics College of PhysicsHenan Normal UniversityXinxiang 453007China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China Institute of Nuclear Science and Technology Henan Academy of ScienceZhengzhou 450046China

From the empirical phenomena of fragment distributions in nuclear spallation reactions,semiempirical formulas named SPAGINS were constructed to predict fragment cross-sections in high-energyγ-induced nuclear spallation reactions(PNSR).In constructing the SPAGINS formulas,theoretical models,including the TALYS toolkit,SPACS,and Rudstam formulas,were employed to study the general phenomenon of fragment distributions in PNSR with incident energies ranging from 100 to 1000 *** the primary characteristics of PNSR,the SPAGINS formulas modify the EPAX and SPACS formulas and efficiently reproduce the measured *** SPAGINS formulas provide a new and effective tool for predicting fragment production in PNSR.

关键词： High-energy gamma-rays Spallation reaction Fragment cross-section Empirical formula EPAX SPACS TALYS

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Multiple-models predictions for drip line nuclides in projectile fragmentation of^(40,48)Ca,^(58,64)Ni,and^(78,86)Kr at 140 MeV/u

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Nuclear Science and Techniques 2022年第12期33卷 49-58页

作者： Xiao-Bao Wei Hui-Ling Wei Yu-Ting Wang Jie pu Kai-Xuan Cheng Ya-fei Guo Chun-Wang Ma College of Physics Henan Normal UniversityXinxiang 453007China

Modern rare isotope beam(RIB)factories will significantly enhance the production of extremely rare isotopes(ERI)at or near drip *** one of the most important methods employed in RIB factories,the production of ERIs in projectile fragmentation reactions should be theoretically improved to provide better guidance for experimental *** cross-sections of ERIs produced in 140 MeV/u^(78,86)Kr/^(58,64)Ni/^(40,48)Ca+9Be projectile fragmentation reactions were predicted using the newly proposed models[i.e.,Bayesian neural network(BNN),BNN+FRACS,and FRACS,see ***.C,46:074104(2022)]and the frequently used EPAX3 *** a minimum cross-section of 1015 mb,the possibilities of ERIs discovery in a new facility for rare isotope beams(FRIB)are discussed.

关键词： Bayesian neural network(BNN) FRACS Drip line Extremely rare isotope Projectile fragmentation

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干旱胁迫下丛生福禄考的生理响应

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国土与自然资源研究 2024年第4期 76-79页

作者：陈菲曲彦婷熊燕韩辉李黎付俊生杨舒畅何璞张洪运黑龙江省科学院自然与生态研究所湿地与生态保育国家地方联合工程实验室哈尔滨150040 大庆市大同区农村社会事业服务中心大庆163000

以丛生福禄考(Phlox subulata)为材料,采用干旱胁迫的方法,研究不同干旱处理时间对丛生福禄考生理指标的影响,以期为研究丛生福禄考响应干旱胁迫的分子机制提供理论依据,为福禄考属植物园林应用及种质资源创新提供参考依据。结果表明,... 详细信息

以丛生福禄考(Phlox subulata)为材料,采用干旱胁迫的方法,研究不同干旱处理时间对丛生福禄考生理指标的影响,以期为研究丛生福禄考响应干旱胁迫的分子机制提供理论依据,为福禄考属植物园林应用及种质资源创新提供参考依据。结果表明,随着干旱时间的延长,丛生福禄考根系MDA含量在干旱4天时含量较高,之后呈下降趋势。总糖含量在干旱8天时达到最低值,之后缓慢增加。Pro含量呈现升-降-升-降变化,SOD活性先下降然后上升,POD活性呈现先下降后上升再下降的趋势。综上所述,丛生福禄考在遭受到干旱胁迫损伤后,积累了一定的活性氧,进而激发了氧化过程,复水后恢复。可见,丛生福禄考具有较强的耐旱能力。

关键词：丛生福禄考干旱胁迫抗旱性生理指标

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