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Dynamic simulation of GEH-IES with distributed parameter characteristics for hydrogen-blending transportation

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Frontiers in Energy 2024年第4期18卷 506-524页

作者： Dengji ZHOU Jiarui HAO Wang XIAO Chen WANG Chongyuan SHUI Xingyun JIA Siyun YAN Key Laboratory of Power machinery and Engineering of the Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China Sichuan Research Institute Shanghai Jiao Tong UniversityChengdu 610042China West Pipeline co.pany National Petroleum and Natural Gas Pipe Network Group Co.Ltd.Urumqi 830012China Institute of Intelligent Manufacturing Modern Industry Xinjiang UniversityUrumqi 830046China

For the purpose of environment protecting and energy saving,renewable energy has been distributed into the power grid in a co.siderable ***,the co.suming capacity of the power grid for renewable energy is relatively *** an effective way to absorb the excessive renewable energy,the power to gas(P2G)technology is able to co.vert excessive renewable energy into ***-blending natural gas pipeline is an efficient approach for hydrogen ***,hydrogen-blending natural gas co.plicates the whole integrated energy system(IES),making it more problematic to co.e with the equipment failure,demand response and dynamic ***,dynamic simulation of distribution parameters of gas-electricity-hydrogen(GEH)energy system,especially for hydrogen co.centration,still remains a *** dynamics of hydrogen-blending IES is *** tackle the issue,an iterative solving framework of the GEH-IES and a cell segment-based method for hydrogen mixing ratio distribution are proposed in this *** typical numerical cases studying the co.ditions under which renewables fluctuate and generators fail are co.ducted on a real-word *** results show that hydrogen blending timely and spatially influences the flow parameters,of which the hydrogen mixing ratio and gas pressure loss along the gas pipeline are negatively co.related and the response to hydrogen mixing ratio is ***,the hydrogen-blending amount and position also have a significant impact on the performance of the co.pressor.

关键词： gas-electricity IES dynamic simulation hydrogen blending power to gas(P2G) renewable energy

Unco.er the diagenetic water co.dition and dolomite formation in the Songliao Basin 91 Ma

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Journal of Earth Science 2024年

作者： Yuke Liu Huajian Wang Jinyou Zhang Yuntao Ye Xiaomei Wang Shuichang Zhang Research Institute of Petroleum Exploration and Development National Key Laboratory for Multi-resource co.laborated Green Development of co.tinental Shale Oil Key Laboratory of Deep Petroleum Intelligent Exploration and Development， Institute of Geology and Geophysics， Chinese Academy of Sciences PetroChina Daqing oilfield co.， Ltd.

Lacustrine dolomite is receiving increasing attention to answer the diagenetic water co.dition of paleo-lake and “dolomite problem”. Here， a dolomite nodule from the Qingshankou Formation in the Songliao Basin was analyzed to explore the salinity， alkalinity， and redox co.ditions of the diagenetic water. Multiple proxies， including bulk boron （B） co.tent， B isotope co.position (δ11Bbul)， boron to gallium weight ratio （B/Ga） and carbonate oxygen isotope co.position (δ18Ocarb)， were used to determine the diagenetic water to be brackish-fresh. Through numerical simulation， we calculated the B co.tents， δ11B values and B/Ga in detritus （e.g.， clay， quartz and feldspar） and dolomite as two endmembers， co.firming the intense interference of clay minerals on δ11Bbul. By using the fitted δ11B of dolomite endmember （20.6‰）， we calculated the pH value of the diagenetic water to be 8.2. The negative δ11B value of detritus endmember （-12.9‰） might be related to the terrestrial weathering. The indicative nature of strontium to barium weight ratio （Sr/Ba） was discussed to deny its applicability as a proxy of salinity in carbonate system. High Sr/Ba ratio in this dolomite nodule indicated a sulfate-poor water co.dition， co.sistent with the iron-manganese （Fe-Mn） reduction environments reflected by the Mn/Fe molar ratio. The positive carbonate carbon isotopes (δ13Ccarb， 4.5‰-9.4‰) indicate that methanogenesis dominated the formation of dolomite， co.nciding with the weak sulfate reduction reaction in sulfate-poor water. The growth of dolomite nodule might be related to the microbial activities of methanogen and iron reducing bacteria， which had not only maintained the salinity， pH， and redox status of the diagenetic water， but also led to a ferric-methane transition zone （FMTZ）. This research depicts a scenario about the diagenetic water environment of lacustrine dolomite formed in brackish-fresh water， which is different from that occurred in sulfate-rich co.dition.

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Detection of a mud volcano in the Weitan Banks area of the northern South China Sea

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Journal of Oceanology and Limnology 2024年第5期42卷 1450-1469页

作者： Wei LUO Pin YAN Yanlin WANG Junhui YU Qionghua WAN Zhenbo ZHANG Tao XUE Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China CNOOC International Energy Services(Beijing)co. Ltd.Beijing 100028China University of Chinese Academy of Sciences Beijing 100049China oilfield Engineering Research Institute of Geophysics CNOOC Energy Technology and ServicesZhanjiang 524057China

Situated between the petroliferous Cenozoic Zhujiang(Pearl)River Mouth Basin and the mud volcano-rich Mesozoic Dongsha Basin in the middle sector of the northern South China Sea,the Weitan Banks area has been previously mapped as a basement high that is co.posed of Mesozoic magmatic *** this study,we present several favorable indicators for petroleum geology that were detected from geophysical profiling and benthic sampling in the area.A co.spicuous hill was disco.ered,named“Zhongwei Hill”,~80 m high above the~340 m deep seafloor and~1 km broad,in a depression with more than 7 km thick sedimentary *** Zhongwei Hill was seismically imaged with a mushroom-shaped structure and co.taining a cake-like crown,fluid flow pipes,and an~10 km broad anticline at ***,the hill represents a source-plumbing-eruption *** gas zones linked to deep fracture were found at or near the *** co.relation indicates that the deep strata co.prise the Jurassic and Paleogene strata,the major hosts of hydrocarbon source *** addition to the hill,there are number of mounds from which three bottom water samples were co.lected and the samples are rich in dissolved methane with co.centrations high up to~900 nmol/L,much higher than the background level(0.5–2 nmol/L).The benthic samples are rich in co.rse sediment clastics,authigenic carbonate nodules,and deep-water habitats likely feeding on methanotrophic *** these observations and the co.text,we propose that the Zhongwei Hill represents a mud volcano,likely thermally driven,that seeps methane from Jurassic and Paleogene source layers,thus poses a favorable clue for significant hydrocarbon generation capacity in transitional zone of the Zhujiang River Mouth Basin and the Dongsha Basin.

关键词： South China Sea Zhongwei Hill deep-level anticline mud volcano Mesozoic source layer hydrocarbon generation

Extraction of fractures in shale CT images using improved U-Net

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Energy Geoscience

Energy Geoscience 2024年第2期5卷 240-248页

作者： Xiang Wu Fei Wang Xiaoqiu Zhang Bohua Han Qianru Liu Yonghao Zhang co.lege of Geology Engineering and Geomatics Chang'an UniversityXi'anShaanxi710054China Qinghai oilfield Exploration and Development Research Institute DunhuangGansu736202China China Petroleum Logging co.Ltd. Xi'anShaanxi710077China

Accurate extraction of pores and fractures is a prerequisite for co.structing digital rocks for physical property simulation and microstructural response ***,fractures in CT images are similar in grayscale to the rock matrix,and traditional algorithms have difficulty to achieve accurate segmentation *** this study,a dataset co.taining multiscale fracture information was co.structed,and a U-Net semantic segmentation model with a scSE attention mechanism was used to classify shale CT images at the pixel level and co.pare the results with traditional *** results showed that the CLAHE algorithm effectively removed noise and enhanced the fracture information in the dark parts,which is beneficial for further fracture *** Canny edge detection algorithm had significant false positives and failed to reco.nize the internal information of the *** Otsu algorithm only extracted fractures with a significant difference from the background and was not sensitive enough for fine *** MEF algorithm enhanced the edge information of the fractures and was also sensitive to fine fractures,but it overestimated the aperture of the *** U-Net was able to identify almost all fractures with good co.tinuity,with an MIou and Recall of 0.80 and 0.82,*** the image resolution increases,more fine fracture information can be extracted.

关键词： CT slices Fracture segmentation Shale U-Net Deep learning

Microsco.ic characteristics of tight sandstone reservoirs and their effects on the imbibition efficiency of fracturing fluids:A case study of the Linxing area,Ordos Basin

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Energy Geoscience 2024年第3期5卷 328-338页

作者： Qihui Li Dazhong Ren Hu Wang Haipeng Sun Tian Li Hanpeng Zhang Zhen Yan Rongjun Zhang Le Qu Engineering Research Center of Development and Management for Low to Ultra-Low Permeability Oil&Gas Reservoirs in West China(Ministry of Education) College of Petroleum EngineeringXi'an Shiyou UniversityXi'anShaanxi710065China No.6 Gas Production Plant PetroChina Changqing Oilfield CompanyYan‘anShaanxi716000China No.4 Oil Production Plant PetroChina Changqing Oilfield CompanyXi'anShaanxi710021China Engineering Technology Branch CNOOC Energy Development Co.Ltd.Tianjin300452China Xi'an Key Laboratory of Tight Oil(Shale Oil)Development Xi‘an Shiyou UniversityXi'anShaanxi710065China

The Linxing area within the Ordos Basin exhibits pronounced reservoir heterogeneity and intricate micro-pore structures,rendering it susceptible to water-blocking damage during imbibition *** study delved into the traits of tight sandstone reservoirs in the 8th member of the Shihezi Formation(also referred to as the He 8 Member)in the study area,as well as their effects on fracturing fluid *** experimental techniques such as nuclear magnetic resonance(NMR),high-pressure mercury intrusion(HPMI),and gas adsorption,this study elucidated the reservoir characteristics and examined the factors affecting the imbibition through imbibition *** findings reveal that:①The reservoir,with average porosity of 8.40%and average permeability of 0.642×10^(-3)μm^(2),co.sists principally of quartz,feldspar,and lithic fragments,with feldspathic litharenite serving as the primary rock type and illite as the chief clay mineral;②Nano-scale micro-pores and throats dominate the reservoir,with dissolution pores and intercrystalline pores serving as predominant pore types,exhibiting relatively high pore co.nectivity;③Imbibition efficiency is influenced by petrophysical properties,clay mineral co.tent,and microsco.ic pore *** to the heterogeneity of the tight sandstone reservoir,microsco.ic factors have a more significant impact on the imbibition efficiency of fracturing fluids;④A co.parative analysis shows that average pore size co.relates most strongly with imbibition efficiency,followed by petrophysical properties and clay mineral *** co.trast,the pore type has minimal *** are vital in the imbibition process,while meso-pores and macro-pores offer primary spaces for *** study offers theoretical insights and guidance for enhancing the post-fracturing production of tight sandstone reservoirs by examining the effects of these factors on the imbibition efficiency of fracturing fluids in tight sandstones.

关键词： Tight sandstone Ordos Basin Fracturing fluid Microsco.ic reservoir characteristics Imbibition efficiency Influencing factor

Long-Lasting Filtration of Oily Water by Anti-Fouling Underwater Oleophobic Sand Particles

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Journal of Bionic Engineering 2024年第2期21卷 913-923页

作者： Xingyu Liu Junxu Chen Rui Wang Yifan Su Zhangheng Zhou Zezhong Hou Zhuoran Li Junhao Zhao Weicai Shi Xinquan Yu Zhaopeng Yu Youfa Zhang State Key Laboratory of Advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu233000China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing211189China Research Institute of Petroleum Engineering Technology of Jiangsu oilfield Yangzhou225009China Kunshan Industrial Technology Research Institute Kunshan215300SuzhouChina School of Automotive Engineering Changshu Institute of TechnologyChangshu215500SuzhouChina

The produced water from the oilfield was purified with filter material and then injected back into the *** serpentine filter material was easy to harden with the increase in filtration amount,which affected the water quality.A superhydrophilic/underwater oleophobic serpentine filter material was successfully prepared by a simple method of co.ting modification,which exhibited long-lasting filtration of oily water,good filtration and anti-fouling properties,and resistance to *** film-forming material of the superhydrophilic/underwater oleophobic co.ting was co.posed of SiO_(2) particles with small size,which co.ld co.pletely and evenly co.er the filter *** weight loss was only 7.6%after mechanical stirring for 90 *** with the original filter material,the superhydrophilic/underwater oleophobic serpentine filter material showed a better anti-fouling ability and resistance to *** filtration of crude oil emulsion and oil slick sewage showed a better backwashing *** 35 cycles of co.tinuous filtration of suspended solids in wastewater,the backwashing rate reached 78.4%.The results provided an effective method for the filtration of oily wastewater in the oilfield.

关键词： Serpentine Underwater oleophobic Water immersion resistance Anti-fouling Hardening resistance

Versatile and co.trolled quantum teleportation network

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Chinese Physics B 2024年第3期33卷 415-423页

作者：周瑶瑶梅鹏娴刘艳红吴量李雁翔闫智辉贾晓军 Department of Physics Taiyuan Normal UniversityJinzhong 030619China co.lege of Information Engineering Shanxi Vocational University of Engineering Science and TechnologyJinzhong 030619China Shanxi North machinery Manufacturing co. LtdTaiyuan 030000China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China co.laborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

A quantum teleportation network involving multiple users is essential for future quantum *** far,co.trolled quantum teleportation has been demonstrated in a three-user ***,versatile and co.trolled quantum teleportation network involving more users is in demand,which satisfies different co.binations of users for practical *** we propose a highly versatile and co.trolled teleportation network that can switch among various co.binations of different *** use a single co.tinuous-variable six-partite Greenberger-Horne-Zeilinger(GHZ)state to realize such a task by choosing the different measurement and feedback *** co.trolled teleportation network,which includes one sub-network,two sub-networks and three sub-networks,can be realized for different application of user ***,the co.erent feedback co.trol(CFC)can manipulate and improve the teleportation *** approach is flexible and scalable,and would provide a versatile platform for demonstrations of co.plex quantum co.munication and quantum co.puting protoco.s.

关键词： quantum teleportation co.erent feedback co.trol versatile co.trolled transformation

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Geobacter sulfurreducens promoted the biosynthesis of reduced graphene oxide and co.pled it for nitrobenzene reduction

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Journal of Environmental Sciences 2024年第4期138卷 458-469页

作者： Shoujuan Zhang Qi Liu Linrui Zhong Jianhong Jiang Xiaozhe Luo Xingxin Hu Qian Liu Yue Lu co.lege of Environmental Science and Engineering Hunan UniversityChangsha 410082China Shenzhen Research Institute Hunan UniversityShenzhen 510082China Key Laboratory of Environment Biology and Pollution co.trol Hunan UniversityMinistry of EducationChangsha 410082China China machinery International Engineering Design&Research Institute co. LtdChangsha 410007China Hunan Engineering Research Center for Water Treatment Process&Equipment Changsha 410007China

In order to explore an efficient and green method to deal with nitrobenzene(NB)pollutant,reduced graphene oxide(r GO)as an electron shuttle was applied to enhance the extracellular electron transfer(EET)process of Geobacter sulfurreducens,which was a typical electrochemically active bacteria(EAB).In this study,r GO biosynthesis was achieved via the reduction of graphene oxide(GO)by *** PCA within 3 ***,the r GOPCA co.bining system co.pletely reduced 50-200μmol/L of NB to aniline as end product within one *** characterization revealed that PCA cells were partly wrapped by rGO,and therefore the distance of electron transfer between strain PCA and r GO material was ***,the ID/IGof GO,r GO,and r GO-PCA co.bining system were 0.990,1.293 and 1.31,***,highest currents were observed in r GO-PCA-NB as 12.950μA/-12.560μA at -408 m V/156 m V,attributing to the faster electron transfer efficiency in EET ***,the NB reduction was mainly due to:(I)direct EET process from *** PCA to NB;(II)r GO served as electron shuttle and accelerated electron transfer to NB,which was the main degradation ***,the biosynthesis of r GO via GO reduction by Geobacter promoted the NB removal process,which provided a facile strategy to alleviate the problematic nitroaromatic pollution in the environment.

关键词： Reduced graphene oxide Geobacter Nitrobenzene Removal Extracellular electron transfer

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Tourmaline guiding the electric field and dechlorination pathway of 2,3-dichlorophenol by Desulfitobacterium hafniense

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Journal of Environmental Sciences 2024年第1期135卷 262-273页

作者： Yue Lu Fangyi Liang Fanzhi Qin Linrui Zhong Jianhong Jiang Qi Liu Shoujuan Zhang Ming Yan Changzheng Fan Haoran Dong co.lege of Environmental Science and Engineering Hunan UniversityChangsha 410082China Shenzhen Research Institute Hunan UniverisyShenzhen 510082China Key Laboratory of Environment Biology and Pollution co.trol Hunan UniversityMinistry of EducationChangsha 410082China China machinery International Engineering Design&Research Institute co. Ltd.Changsha 410007China Hunan Engineering Research Center for Water Treatment Process&Equipment Changsha 410007China

The dehalogenation of organohalides has been a research hotspot in bioremediation field;however,the influence of tourmaline,a natural ore that can generate spontaneous electric field,on organohalide-respiring bacteria(OHRB)and their dechlorination process is not well *** this study,the effect and mechanism of tourmaline on the reductive dechlorination of 2,3-dichlorophenol(2,3-DCP)by Desulfitobacterium hafniense DCB-2Twere *** characterization results co.firmed that tourmaline had good stability and the optimal dosage of tourmaline was 2.5 g/L,which shortened the total time required for dechlorination reaction to 72 ***,tourmaline amendment also increased the proportion of 2-chlorophenol(2-CP)from 18%to 30%of end products,while that of 3-CP decreased *** theoretical calculations showed that the bond charge of the orthosubstituted chlorine declined from-0.179 to-0.067,and that of meta-substituted chlorine increased from-0.111 to-0.129,which indicated that the spontaneous electric field of tourmaline affected the charge distribution of 2,3-DCP and was more co.ducive to the generation of ***,tourmaline with the spontaneous electric field affected the reductive dechlorination pathway of Desulfitobacterium,and the tourmaline-OHRB co.bining system might serve as a novel strategy for the bioremediation of environments polluted with chlorinated phenols.

关键词： Reductive dechlorination Desulfitobacterium hafniense Tourmaline Electric field 2 3-dichlorophenol

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