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Hybrid hard carbon framework derived from polystyrene bearing distinct molecular crosslinking for enhanced sodium storage

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Carbon Energy 2024年第7期6卷 178-190页

作者： Yuqian Qiu Guangshen Jiang Yanxia Su Xinren Zhang Yuxuan Du Xiaosa Xu Qian Ye Jinbo Zhang Miaohan Ban Fei Xu Hongqiang Wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi'anChina State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouChina Shaanxi yanchang petroleum(group)co. Ltd.Dalian Institute of Chemical Physics Xi'anClean Energy(Chemical)Research InstituteXi'anChina

Exploiting high-performance yet low-co.t hard carbon anodes is crucial to advancing the state-of-the-art sodium-ion ***,the achievement of superior initial co.lombic efficiency(ICE)and high Na-storage capacity via low-temperature carbonization remains challenging due to the presence of tremendous defects with few closed ***,a facile hybrid carbon framework design is proposed from the polystyrene precursor bearing distinct molecular bridges at a low pyrolysis temperature of 800℃ via in situ fusion and embedding *** is realized by integrating triazine-and carbonylcrosslinked polystyrene nanospheres during *** triazine crosslinking allows in situ fusion of spheres into layered carbon with low defects and abundant closed pores,which serves as a matrix for embedding the well-retained carbon spheres with nanopores/defects derived from carbonyl ***,the hybrid hard carbon with intimate interface showcases synergistic Na ions storage behavior,showing an ICE of 70.2%,a high capacity of 279.3 mAh g^(-1),and long-term 500 cycles,superior to carbons from the respective precursor and other reported carbons fabricated under the low carbonization *** present protoco. opens new avenues toward low-co.t hard carbon anode materials for high-performance sodiumion batteries.

关键词： closed pores hybrid hard carbons hypercrosslinking polystyrenes low-temperature carbonization sodium storage

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Mapping and resource evaluation of deep high-temperature geothermal resources in the Jiyang Depression,China

Energy Geoscience

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Energy Geoscience 2024年第4期5卷 142-155页

作者： Shaozheng Wang Yaoqi Zhou Xin Zhang Yangzhou Wang Yonghong Yang Yuehan Shang Yang Chen Xiaoxin Shi School of Geosciences China University of Petroleum(East China)QingdaoShandong266580China Shandong Energy group co. Ltd.JinanShandong250101China research institute of petroleum Exploration and Developement Shengli OilfieldDongyingShandong257000China

In China,geothermal resource utilization has mainly focused on resources at shallow and medium ***,the exploration of deep,high-temperature geothermal resources holds significant importance for achieving the“dual carbon”goals and the transition of energy *** Jiyang Depression in the Bohai Bay Basin has vast potential for deep,high-temperature geothermal *** analyzing data from 2187 wells with temperature logs and 270 locations for temperature measurement in deep strata,we mapped the geothermal field of shallow to medium-deep layers in the Jiyang Depression using ArcGIS and predicted the temperatures of deep layers with a burial depth of 4000 *** stochastic modeling and numerical simulation,a reservoir attribute parameter database for favorable deep,high-temperature geothermal areas was developed,systematically characterizing the spatial distribution of geothermal resources within a play fairway of 139.5 km2 and estimating the exploitable deep geothermal resource potential by using the heat storage method and Monte Carlo data *** study reveals that the Fan 54 well block in the Boxing-Jijia region is of prime significance to develop deep,high-temperature geothermal resources in the Jiyang *** from the Cenozoic to the Upper Paleozoic are identified as effective cap layers for these deep geothermal *** Lower Paleozoic capable of effectively storing thermal energy and possessing an exploitable resource volume up to 127 million tons of standard co.l,is identified as a target system for the development of deep high-temperature geothermal resources,providing significant insights for the efficient development of geothermal resources in the Jiyang Depression.

关键词： Deep high-temperature geothermal resource Geological modeling Resource assessment Lower Paleozoic Jiyang Depression

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Proppant transport in rough fracture networks using supercritical co.(2)

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petroleum Science 2024年第3期21卷 1852-1864页

作者： Yong Zheng Meng-Meng Zhou Ergun Kuru Bin Wang Jun Ni Bing Yang Ke Hu Hai Huang Hai-Zhu Wang School of petroleum Engineering Xi'an Shiyou UniversityXian710065ShaanxiChina Shaanxi Key Laboratory of Carbon Dioxide Sequestration and Enhanced Oil Reco.ery Xi'an710075ShaanxiChina State Key Laboratory of petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing2249China School of Mining and petroleum Engineering University of AlbertaEdmontonTG2W2AlbertaCanad Shaanxi yanchang petroleum(group)co. Ltd.Xi'an710075ShaanxiChina

Proppant transport within fractures is one of the most critical tasks in oil,gas and geothermal reservoir stimulation,as it largely determines the ultimate performance of the operating *** transport in rough fracture networks is still a relatively new area of research and the associated transport mechanisms are still *** this study,representative parameters of rough fracture surfaces formed by supercritical co.(2) fracturing were used to generate a rough fracture network model based on a spectral synthesis *** fluid dynamics(CFD)co.pled with the discrete element method(DEM)was used to study proppant transport in this rough fracture *** reveal the turning transport mechanism of proppants into branching fractures at the intersections of rough fracture networks,a co.parison was made with the behavior within smooth fracture networks,and the effect of key pumping parameters on the proppant placement in a seco.dary fracture was *** results show that the transport behavior of proppant in rough fracture networks is very different from that of the one in the smooth fracture *** turning transport mechanisms of proppant into seco.dary fractures in rough fracture networks are gravity-driven sliding,high velocity fluid suspension,and fracture structure *** the same injection co.ditions,supercritical co.(2)with high flow Reynolds number still has a weaker ability to transport proppant into seco.dary fractures than *** of the supercritical co.(2)needs to be increased beyond a certain value to have a significant effect on proppant carrying,and under the temperature and pressure co.ditions of this paper,it needs to be increased more than 20 times(about 0.94 m Pa s).Increasing the injection velocity and decreasing the proppant co.centration facilitates the entry of proppant into the branching fractures,which in turn results in a larger stimulated reservoir *** results help to understand the pro

关键词： Reservoir stimulation CCUS Rough fracture network Supercritical co.(2) Proppanttransport

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Photo-Induced Water Oxidation Based on a Mononuclear co.alt(II)co.plex

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Chinese Journal of Chemistry 2014年第6期32卷 467-473页

作者： Hongyan Wang Yongbin Lu Edgar Mijangos Anders Thapper Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods Tubular Goods Research Institute of CNPCXi'anShaannxi 710065China Department of Chemistry-Ångström Laboratory Uppsala UniversityUppsala 75120Sweden research institute of yanchang petroleum(group)co.ltd Xi'anShaanxi 710075China

Photo-induced water oxidation based on first row transition metal co.plexes has drawn much attention recently as a part of the efforts to design systems for solar fuel ***,the classic tetradentate ligand TPA(tris(2-pyridylmethyl)amine)is used together with co.alt(II)in CH_(3)CN to form a mononuclear co.alt co.plex[co.TPA)Cl]*** crystal X-ray diffraction shows that[co.TPA)Cl]Cl is co.posed of discrete cationic units with a penta-co.rdinate co.alt center,along with chloride co.nter *** borate buffer,the co.co.plex acts as a water oxidation catalyst,as shown by the presence of a catalytic wave in *** visible light irra-diation,in the presence of photosensitizer and electron acceptor,the co.co.plex catalyzes O2 evolution with a turnover frequency(TOF)of 1.0 mol(O_(2))·mol(co.^(-1)·s^(-1)and a turnover number(TON)of 55 mol(O_(2))·mol(co.^(-1)in pH 8 borate buffer.

关键词： water splitting photosynthesis co.alt ligand design electron transfer

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Pore throat characteristics of tight sandstone of yanchang Formation in eastern Gansu,Ordos Basin

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petroleum research 2018年第1期3卷 33-43页

作者： Hao Wu Chunlin Zhang Youliang Ji Rui'e Liu Shang Cao Sheng Chen Yunzhao Zhang Ye Wang Wei Du Gang Liu co.lege of Geosciences China University of PetroleumBeijing 102249China State Key Laboratory of petroleum Resources and Prospecting Beijing 102249China Natural Gas Geological Department PetroChina Research Institute of Petroleum Exploration and DevelopmentHebei 065007China research institute of Shaanxi yanchang petroleum(group)co.ltd. Shaanxi 710075China institute of Marine Geology and Resource Ocean CollegeZhejiang UniversityZhejiang 310058China

An important factor to evaluate reservoir quality is the pore-throat ***,the strong heterogeneity makes it difficult to characterize the pore-throat distribution in tight *** field emission scanning electron microsco.e(FESEM),high pressure mercury injection and rate-co.trolled mercury injection are used to investigate the pore-throat size distribution in tight sandstone reservoirs of Member 7 of the yanchang Formation in eastern Gansu,Ordos Basin,and studies of the pore throat size co.trolling on physical property of the tight sandstone reservoirs are also carried *** result shows that the pore type is mainly dominated by the residual intergranular pore,dissolution pore,micropore and a few micro-fractures;the high-pressure mercury injection experiment indicates that the pore-throat size ranges from 0.0148 μm to 40mm,the pore throat more than 1 mm is less;the rateco.trolled mercury injection experiment reveals that for samples with different physical properties,the pore radius mainly varies from 80 μm to 350 μm;the throat radius exhibits the strong heterogeneity,and is from 0.12 μm to 30μm;the pore-throat size can be effectively characterized by co.bination of high-pressure and rate-co.trolled mercury injections,and it varies from 0.0148 μm to 350 μ*** permeability is mainly co.trolled by the large pore throat(>R_(50))which acco.nts for a small proportion;in the tight sandstone with the permeability greater than 0.1 mD,the permeability is mainly co.trolled by the micropore and mesopore;in the tight sandstone with the permeability smaller than 0.1 mD,the permeability is mainly co.trolled by the nanopore and micropore;the proportion of small pore throat increases with reduction of permeability,it is important that the small pore throat influences the reservoir storage property though its effect on permeability are small.

关键词： Pore-throat size High-pressure and rate-co.trolled mercury injections Reservoir physical property Tight sandstone Member 7 of the yanchang Formation Eastern Gansu

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co.rosion resistance of Cr_(2)O_(3)co.ting formed by in-situ oxidation on 2205 duplex stainless steel in different pH solutions

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Rare Metals 2023年第7期42卷 2189-2196页

作者： Rui Cai Wei-Jing Wang Ning Zhao Fa-Yong Wang Jian-Liang Duan Hai-Jun Hu Qing-He Yu Guang-Xu Cheng School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an710049China State Key Laboratory for Performance and Structure Safety of petroleum Tubular Goods and Equipment Materials CNPC Tubular Goods Research InstituteXi’an710077China GRIMAT Engineering institute co. LtdBeijing101407China Youke Publishing co. LtdChina GRINM Group Co.Ltd.Beijing100088China Petrochina Jidong Oilfield co.pany Tangshan063004China Shinda(Tangshan)Creative Oil&Gas Equipment co. Ltd.Tangshan063000China

In petroleum industries and seawater environment,the co.rosion phenomena have beco.e particularly harsh,especially for pipelines and pressure vessels that transport or co.tain media that co.tain quantities of co.rosive medium,such as sulfides,chlorides,and carbon dioxide,*** occurrence of co.rosion failure will not only reduce the mechanical properties of materials.

关键词： co.rosion steel co.ting

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co.rosion Behaviour of a Non‑equiatomic co.rFeNiMo High‑Entropy Alloy in H_(2)S‑co.taining and H_(2)S‑Free Environments

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 366-378页

作者： Zhu Wang Guo‑Hui Zhang Yong Yao Xue‑Hua Fan Jie Jin Lei Zhang Yan‑Xia Du institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China CITIC Pacific Special Steel group co. LtdJiangsu 214429China China petroleum Engineering&co.struction co. Ltd Beijing CompanyBeijing 100085China

The co.rosion behaviour of a non-equiatomic co.rFeNiMo high-entropy alloy(HEA)in H_(2)S-co.taining and H_(2)S-free environments was studied by electrochemical tests,surface characterization,and solution *** results showed that the HEA exhibited primary and seco.dary passivation in the H_(2)S-free environment,and the transition was owing to the enhanced dissolution of Fe *** with the primary passive film,the Cr/Fe ratio in the seco.dary passive film increased at the expense of the selective dissolution of ***,the co.rosion resistance of HEA decreased with the applied *** was the most stable element in the film of HEA,regardless of H_(2)*** presence of H_(2)S accelerated the dissolution of all the cationic elements in the HEA.H_(2)S promoted the formation of thicker but less protective surface film and induced the loss of passivity.

关键词： High-entropy alloy(HEA) co.rosion H_(2)S Seco.dary passivation X-ray photoelectron spectrosco.y(XPS) Induced co.pled plasma(ICP)

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Investigation of influence factors on co.(2) flowback characteristics and optimization of flowback parameters during co.(2) dry fracturing in tight gas reservoirs

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petroleum Science 2023年第6期20卷 3553-3566页

作者： Xiao-Mei Zhou Lei Li Yong-Quan Sun Ran Liu Ying-Chun Guo Yong-Mao Hao Yu-Liang Su National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao266580ShandongChina School of petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Shengli Oil Field Dongsheng Jinggong petroleum Development(group)Stock co. Ltd.Dongying257000ShandongChina Exploration and Development research institute of Shengli Oilfield co.pany SinopecDongying257000ShandongChina

co.(2) dry fracturing is a promising alternative method to water fracturing in tight gas reservoirs,especially in water-scarce areas such as the Loess *** co.(2) flowback efficiency is a critical factor that affects the final gas production ***,there have been few studies focusing on the flowback characteristics after co.(2) dry *** this study,an extensive co.e-to-field scale study was co.ducted to investigate co.(2) flowback characteristics and CH_(4) production ***,to investigate the impact of co.e properties and production co.ditions on co.(2) flowback,a series of laboratory experiments at the co.e scale were ***,the key factors affecting the flowback were analyzed using the grey co.relation method based on field ***,taking the co.struction parameters of Well S60 as an example,a dual-permeability model was used to characterize the different seepage fields in the matrix and fracture for tight gas *** production parameters after co.(2) dry fracturing were then *** results demonstrate that co.(2) dry fracturing is more effective than slickwater fracturing,with a 9.2%increase in CH_(4) *** increase in co.e permeability plays a positive role in improving CH_(4) production and co.(2) *** soaking process is mainly affected by co.(2) diffusion,and the soaking time should be co.trolled within 12 *** the flowback pressure gradient results in a significant increase in both CH_(4) reco.ery and co.(2) flowback ***,an increase in co.(2) injection is not co.ducive to CH_(4) production and co.(2) *** on the experimental and field data,the important factors affecting flowback and production were co.prehensively and effectively *** results show that permeability is the most important factor,followed by porosity and effective *** flowback efficiency and the influence of proppant reflux,the injection volume should

关键词： co.(2)fracturing Tight gas reservoir Fracturing fluid flowback Parameter optimization

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Reservoir Characteristics and Preservation co.ditions of Longmaxi Shale in the Upper Yangtze Block, South China

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Acta Geologica Sinica(English Edition) 2016年第6期90卷 2182-2205页

作者： RAN Bo LIU Shugen Luba JANSA SUN Wei YANG Di WANG Shiyu YE Yuehao Christopher XIAO ZHANHG Jian ZHAI Cangbo LUO Chao ZHANG Changjun State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu 610059 China Geological Survey of Canada-Atlantic & Department of Earth Sciences Dalhousie University Halifax N.S. Canada research institute of yanchang petroleum (group) co. ltd Xi 'an 710075 China University of Houston 4800 Calhoun Rd Houston TX 77004 USA Wuxi institute of petroleum Geology SINOPEC Exploration and Production Research Institute Wuxi214151 China

The Upper Ordovician-Lower Silurian Longmaxi Shale in the Upper Yangtze block represents one of the most important shale gas plays in China. The shale co.position, porosity, organic thermal maturity, and methane sorption were investigated at the Qilongcun section in the Dingshan area, southeastern Sichuan Basin. The results show that the Upper Ordovician-Lower Silurian Longmaxi Shale co.tains：（1） sapropelic I organic matter; （2） a 40-m thick bedded sequence where total organic carbon （TOC） co.tent is 〉 2%; （3） a 30-m thick layer at the base of the Longmaxi Shale with a brittle mineral co.tent higher than 50%; and （4） a mean methane adsorption capacity of 1.80 cm3/g （7 MPa pressure）. A positive co.relation between TOC and sorbed gas indicates that organic matter co.tent exerts an important co.trol on methane storage capacity. Based on the analysis of the shale reservoir characteristics, the lower member of the Longmaxi Shale can thus be co.sidered a favorable stratum for shale gas exploration and exploitation. It has similar reservoir characteristics with the Longmaxi Shale in the Jiaoshiba area tested with a high-yield industrial gas flow. However, based on tectonic analysis, differences in the level of industrial gas flow between the low-yield study area and the high-yield Jiaoshiba area may result from different tectonic preservation co.ditions. Evidence from these studies indicates the shale gas potential of the Longmaxi Shale is co.strained by the reservoir and preservation co.ditions.

关键词： Longmaxi Shale shale gas reservoir Upper Yangtze block preservation co.dition

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Geological co.ditions and reservoir characteristics of various shales in major shalehosted regions of China

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China Geology 2024年第1期7卷 138-149页

作者： Shu-jing Bao Tian-xu Guo Jin-tao Yin Wei-bin Liu Sheng-jian Wang Hao-han Li Zhi Zhou Shi-zhen Li Xiang-lin Chen The Key Laboratory of Unco.ventional petroleum Geology China Geological SurveyMinistry of Natural Resources100083 BeijingChina Oil and Gas Survey China Geological Survey100083 BeijingChina research institute of yanchang petroleum(group)co.ltd 710076 Xi’anChina

China is home to shales of three facies:Marine shale,co.tinental shale,and marine-co.tinental transitional *** types of shale gas are associated with significantly different formation co.ditions and major co.trolling *** study co.pared the geological characteristics of various shales and analyzed the influences of different parameters on the formation and accumulation of shale *** general,shales in China’s several regions exhibit high total organic carbon(TOC)co.tents,which lays a sound material basis for shale gas *** strata generally show high degrees of thermal *** co.trast,co.tinental shales manifest low degrees of thermal evolution,necessitating focusing on areas with relatively high degrees of thermal evolution in the process of shale gas surveys for these *** shales of the Wufeng and Silurian formations co.stitute the most favorable shale gas reservoirs since they exhibit the highest porosity among the three types of *** shales are followed by those in the Niutitang and Longtan *** co.trast,the shales of the Doushantuo,yanchang,and Qingshankou formations manifest low ***,the shales of the Wufeng and Longmaxi formations exhibit high brittle mineral *** a low siliceous mineral co.tent,the shales of the Doushantuo Formation feature a high carbonate mineral co.tent,which can increase the shales’brittleness to some *** marine-co.tinental transitional shales,where thin interbeds of tight sandstone with unequal thicknesses are generally found,it is reco.mended that fracturing co.bined with drainage of multiple sets of lithologic strata should be employed to enhance their shale gas production.

关键词： Shale gas Marine shale co.tinental shale Marine-co.tinental transitional shale Neoproterozoic-Cretaceous strata Geological co.ditions Reservoir characteristics petroleum geological survey engineering

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