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Remaining oil distribution characteristics in an oil reservoir with ultra-high water-cut

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Energy Geoscience 2024年第1期5卷 219-223页

作者： Hongmin Yu Youqi Wang Li Zhang Qingxin Zhang Zhenhai Guo Benzhe Wang Tao Sun SINOPEC Petroleum Exploration and Development Research Institute Beijing100083China Shengli Oil Production Plant SINOPEC Shengli Oilfield BranchDongyingShandong257051China

An accurate mapping and understanding of remaining oil distribution is very important for water control and stabilize oil production of mature oilfields in ultra-high water-cut ***,the Tuo-21 Fault Block of the Shengtuo Oilfield has entered the stage of ultra-high water cut(97.2%).Poor adaptability of the well pattern,ineffective water injection cycle and low efficiency of engineering measures(such as workover,re-perforation and utilization of high-capacity pumps)are the significant problems in the ultra-high water-cut *** order to accurately describe the oil and water flow characteristics,relative permeability curves at high water injection multiple(injected pore volume)and a semiquantitative method is applied to perform fine reservoir simulation of the Sand group 3e7 in the *** accurate reservoir model is built and history matching is *** distribution characteristics of remaining oil in lateral and vertical directions are quantitatively simulated and *** results show that the numerical simulation considering relative permeability at high injection multiple can reflect truly the remaining oil distribution characteristics after water flooding in an ultrahigh water-cut *** distribution of remaining oil saturation can be mapped more accurately and quantitatively by using the‘four-points and five-types’classification method,providing a basis for potential tapping of various remaining oil types of oil reservoirs in late-stage of development with high water-cut.

关键词： Ultra-high water-cut High water injection multiple Four-points and five-types Numerical simulation Remaining oil distribution

Resilience-oriented Hardening and Expansion Planning of Transmission System Under Hurricane Impact

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1746-1760页

作者： Jing Zhou Heng Zhang Haozhong Cheng Shenxi Zhang Lu Liu Zheng Wang Xiaohu Zhang Key Laboratory of Control of Power Transmission and Conversion Ministry of EducationElectrical Engineering DepartmentShanghai Jiao Tong UniversityShanghai 200240China State Grid East China branch Shanghai 200120China

In this paper,we propose a two-stage transmission hardening and planning(TH&P)model that can meet the load growth demand of normal scenarios and the resilience requirements of hurricane-induced damage *** better measure the resilience requirements,the proposed TH&P model includes two resilience assessment indexes,namely,the load shedding(LS)under the damage scenario and the average connectivity degree(ACD)at different *** first-stage model,which aims to meet the load growth demand while minimizing the LS,is formulated as a mixed-integer linear program(MILP)to minimize the total planning and hardening cost of transmission lines,the operating cost of generators,and the penalty cost of wind power and load shedding in both normal and damage *** second-stage model aims to further improve the ACD when the ACD of the scheme obtained from the first-stage model cannot reach the ***,the contribution of each transmission line to the ACD is calculated,and the next hardened line is determined to increase the *** process is repeated until the ACD meets the *** studies of the modified IEEE RTS-24 and two-area IEEE reliability test system-1996 indicate the proposed TH&P model can meet the requirements for both normal and damage scenarios.

关键词： Hardening hurricane disaster resilience transmission expansion planning

Stretchable on-skin touchless screen sensor enabled by ionic hydrogel

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Nano Research 2024年第5期17卷 4462-4470页

作者： Tianxing Feng Dan Ling Chaoyue Li Wentao Zheng Shichuan Zhang Chang Li Artem Emel’yanov Alexander S.Pozdnyakov Lijun Lu Yanchao Mao Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China A.E.Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of SciencesIrkutsk 664033Russian Federation

Screen sensors are the most commonly used human-machine interfaces in our everyday life,which have been extensively applied in personal electronics like *** screen sensors are attracting growing interest due to their distinct advantages of high interaction freedom,comfortability,and hand ***,the material compositions of current touchless screen sensors are rigid and fragile,hardly meeting the needs of wearable and stretchable on-skin electronics ***,these touchless screen sensors are also restricted by high power consumption,limited gesture types of recognition,and the requirement of light ***,we report a stretchable on-skin touchless screen sensor(OTSS)enabled by an ionic hydrogel-based triboelectric nanogenerator(TENG).Compared with current touchless screen sensors,the OTSS is stretchable,self-powered,and competent to recognize diverse gestures by making use of charges naturally carried on fingers without the need of sufficient light *** on-skin noncontact screen operating system is further demonstrated on the basis of the OTSS,which could unlock a cellphone interface in touchless operation mode on the human *** work for the first time introduces the on-skin touchless concept to screen sensors and offers a direction to develop new-generation screen sensors for future cellphones and personal electronics.

关键词： human-machine interface stretchable ionic hydrogel triboelectric nanogenerator self-powered sensor

Structure regulating of metal clusters in carbonized metallic organic frameworks for high-efficient microwave absorption via tuning interaction strength between metals and ligands

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Nano Research 2024年第3期17卷 1699-1709页

作者： Chang Sun Kun-Yan Zhao Ming-Lu Huang Cheng-Long Luo Xu-Dong Chen Ming Wang School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function ManufacturingSouthwest UniversityChongqing 400715China Jieyang branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Carbonized metallic organic frameworks(CMOF)have been attracting attention in microwave absorption(MA)research area because of their diverse structures,tunable compositions,and rich ***,structure regulation on metal clusters in CMOF is achieved by tuning the interaction strength between metals and ligands to enhance microwave absorption *** to relatively weak interaction among copper cations and ligands,copper nanoclusters(CuNC)can be uniformly formed and embedded within the cobalt/zinc(Co/Zn)***,copper cations are added to the Co/Zn bimetallic zeolitic imidazolate frameworks(ZIFs).Secondly,the CMOF composite particles with CuNCs(CuNCs/CoZn-CMOF)were developed by a pyrolysis *** CuNCs/CoZn-CMOF with an appropriate amount of CuNCs can harmonize both dielectric and magnetic *** a result,the minimum reflection loss(RLmin)reaches–45.1 dB at a matching thickness of 2.30 mm and the effective absorption bandwidth(EAB)is 8.80 GHz at a thickness of 3.10 *** broadband response to electromagnetic waves is attributed to interfacial polarization at CuNCs surface and heterogeneous interfaces,impedance matching and multiple scattering of electromagnetic *** study provides a feasible method to develop CMOF microwave absorption materials with high EAB values.

关键词： heterogeneous interface carbonized metallic organic frameworks microwave absorption interfacial polarization

Enhancing hyperspectral power transmission line defect and hazard identification with an improved YOLO-based model

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Optoelectronics Letters 2024年第11期20卷 681-688页

作者： WANG Meng SUN Long JIANG Jiong YANG Jinsong ZHANG Xingru Ningbo Power Transmission and Transformation Construction Co. Ltd.Yongyao Technology Branch State Grid Ningbo Power Supply Company

To address the challenges of inefficient manual inspections and time-consuming video monitoring for power transmission lines, this paper presents an innovative solution. It combines deep learning algorithms with visib... 详细信息

关键词： A

Finer-scale urban health risk assessment based on the interaction perspective of thermal radiation,human,activity,and space

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Frontiers of Architectural Research 2024年第3期13卷 682-697页

作者： Ruonan Guo Fei Guo Jing Dong Zixuan Wang Ruwei Zheng Hongchi Zhang School of Architecture and Fine Art Dalian University of TechnologyDalian 116024China Weifang Natural Resources and Planning Bureau High Tech branch Weifang 261041China

Urban heat stress profoundly affects the health of ***,current research primarily focuses on quantifying the risk of urban heat based on LST,Ta,etc.,overlooking the crucial and intimate influence of continuous intense solar radiation on human thermal comfort and ***,there is a lack of smaller units to support more precise *** study utilized the radiant heat stress intensity(RHSI)metric concentrating on the intensity and duration of thermal radiation,to develop a thermal-radiation induced health risk(TIHR)assessment *** technologies such as the SOLWEIG model,Python,BERT,and GIS enables precise calculations of 12 spatial indices,including RHSI and Weibo *** facilitates a more accurate assessment of health risks at the smallest urban units(blocks)and directly guides *** application of this workflow in the case of Suoyuwan,Dalian,China,confirms its value,as it can be used to determine which blocks should be prioritized for specific aspects of risk prevention and *** results show that some blocks exhibited differences in TIHR even within close proximity,with disaster-causing factors varying according to *** study proposes a novel assessment framework based on the interactive perspective of thermal radiation-human-activity-space.

关键词： Health risk assessment Thermal radiation Finer-scale Block Planning Human-centered

SO_(2)and SOF_(2)simultaneous detection by single mid-infrared laser based on tunable diode laser absorption spectroscopy

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High Voltage 2024年第4期9卷 786-793页

作者： Yin Zhang Yan Li Jin Yan Chao Bian Xuan Chen Xiaoxing Zhang Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment Hubei University of TechnologyWuhanChina State Grid Jiangsu Electric Power Co. Ltd.Ultra High Voltage BranchNanjingChina

In the detection of multi-component gas based on tunable diode laser absorption spectroscopy(TDLAS),the problem of overlapping interference between the absorption lines of each gas is often *** example,when detecting a gas mixture of sulphur dioxide(SO_(2))and thionyl fluoride(SOF_(2)),the characteristic decomposition components of SF6,there is overlapping interference in the absorption lines of the two gases,which makes it difficult to detect the concentration of gases *** view of this problem,a novel method based on support vector regression model used for TDLAS is proposed to detect two gases *** detection results show that the correlation coefficients between the concentration of SO_(2)and SOF_(2)and the average value of the second harmonic peak reached 0.992 and *** addition,through model testing,different concentrations of SO_(2)and SOF_(2)gas mixture are simultaneously detected,and the resulting maximum errors for measuring SO_(2)and SOF_(2)concentrations are less than 7.13×10^(-5)and 0.26×10^(-2).The maximum errors of the measurement results in the verification test are not more than 6.4×10^(-3)and 4.6×10^(-2).Therefore,with assistance of the novel method,the detection of multiple gases by using a single laser is achieved.

关键词： tunable diode absorption

Biotin-modified Galactosylated Chitosan-gene Carrier in Hepatoma Cells Targeting Delivery

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Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 522-531页

作者：程明荣张锋李清王华 Department of General Surgery Nanxiang Branch of Ruijin HospitalShanghai 201802China Minhang District Pujin Community Health Service Center Shanghai 201112China Hepatobiliary Surgery Center Tongji Hospital Affiliated to Tongji UniversityShanghai 200065China

Our previous studies have successfully grafted biotin and galactose onto chitosan(CS)and synthesized biotin modified galactosylated chitosan(Bio-GC).The optimum N/P ratio of Bio-GC and plasmid DNA was 3:*** this N/P ratio,the transfection efficiency in the hepatoma cells was the highest with a slow release ***-GC nanomaterials exhibit the protective effect of preventing the gene from nuclease degradation,and can target the transfection into hepatoma cells by combination with galactose and biotin *** transfection rate was inhibited by the competition of galactose and ***-GC nanomaterials were imported into cells’cytoplasm by their receptors,followed by the imported exogenous gene transfected into the ***-GC nanomaterials can also cause inhibitory activity in the hepatoma cells in the model of orthotopic liver transplantation in mice,by carrying the gene through the blood to the hepatoma *** together,bio-GC nanomaterials act as gene vectors with the activity of protecting the gene from DNase degradation,improving the rate of transfection in hepatoma cells,and transporting the gene into the cytoplasm in vitro and in ***,they are efficient hepatoma-targeting gene carriers.

关键词： gene vector hepatocellular carcinoma nanoparticles sustained release gene therapy

Remaining Useful Life Prediction Method for Multi-Component System Considering Maintenance:Subsea Christmas Tree System as A Case Study

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China Ocean Engineering 2024年第2期38卷 198-209页

作者： WU Qi-bing CAI Bao-ping FAN Hong-yan WANG Guan-nan RAO Xi GE Weifeng SHAO Xiao-yan LIU Yong-hong CNOOC Safety Technology Services Co. Ltd.Tianjin 300456China College of Mechanical and Electronic Engineering China University of PetroleumQingdao 266580China CNOOC EnerTech Safety&Environmental Protection BranchTianjin 300456China

Maintenance is an important technical measure to maintain and restore the performance status of equipment and ensure the safety of the production process in industrial production,and is an indispensable part of prediction and health ***,most of the existing remaining useful life(RUL)prediction methods assume that there is no maintenance or only perfect maintenance during the whole life cycle;thus,the predicted RUL value of the system is obviously lower than its actual operating *** complex environment of the system further increases the difficulty of maintenance,and its maintenance nodes and maintenance degree are limited by the construction period and working conditions,which increases the difficulty of RUL *** RUL prediction method for a multi-omponent system based on the Wiener process considering maintenance is *** performance degradation model of components is established by a dynamic Bayesian network as the initial model,which solves the uncertainty of insufficient data *** on the experience of experts,the degree of degradation is divided according to Poisson process simulation random failure,and different maintenance strategies are used to estimate a variety of condition maintenance *** example of a subsea tree system is given to verify the effectiveness of the proposed method.

关键词： remaining useful life Wiener process dynamic Bayesian networks maintenance subsea Christmas tree system