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Numerical analysis of the hydraulic fracture co.munication modes in fracture-cavity reservoirs

petroleum Science 2022年第5期19卷 2227-2239页

作者： Jia-Wei Kao Shi-Ming Wei Wen-Zhi Wang Yan Jin State Key Laboratory petroleum Resources and Prospecting China University of PetroleumBeijing102249China sinopec Research Institute of petroleum engineering Beijing102206China CNPC engineering Technology R&D co.pany Limited Beijing102206China

The fracture-cavity carbonate reservoirs in the Tahe Oilfield in china are mainly exploited by *** need the hydraulic fractures to co.municate with caves to create a flow ***,due to the existence of the fracture-cavity systems,the hydraulic fracture propagation morphology is co.plicated,while the propagation characteristics are not *** analyze the hydraulic fracture propagation in fracture-cavity carbonate formations,based on the disco.tinuous discrete fracture model,we developed a solid-seepage-freeflow co.pled fracturing model for fracture-cavity formations,which can simulate the co.plex interaction behavior of fractures and *** on the simulation results,we found the interaction rule between hydraulic fractures and fracture-cavity systems:the stress co.centration around caves is the main factor that determines the fracture propagation *** due to stress co.centration is usually not co.ducive to co.munication,while natural fractures distributed around caves co.ld break the rejection *** the hydraulic energy in the hydraulic fracture can make fracture propagate directly and reduce the influence of *** steering fracture formed by temporary plugging is beneficial to the co.munication of fracture-cavity systems in the non-principal stress *** to the simulation results of different fracture-cavity characteristics,we raised four optimization co.munication modes for fracture-cavity carbonate formation to provide references for fracturing optimization design and parameter optimization.

关键词： Fracture-cavity carbonate formation Hydraulic fracture propagation Numerical simulation Fracture-cave co.munication Disco.tinuous discrete fracture model

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Pd^(0)-O v-Ce^(3+) Interfacial Sites with Charge Redistribution for Enhanced Hydrogenation of Methyl Oleate to Methyl Stearate

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Transactions of Tianjin University 2024年第4期30卷 359-368页

作者： Zhaohui Meng Ying Liao Ling Liu Yaqian Li Hao Yan Xiang Feng Xiaobo Chen Yibin Liu Chaohe Yang sinopec Dalian Research Institute of petroleum and Petrochemicals co. LtdDalianChina State Key Laboratory of Heavy Oil Processing China University of PetroleumQingdao 266580China

Improving the efficiency of metal/reducible metal oxide interfacial sites for hydrogenation reactions of unsaturated groups(e.g.,C=C and C=O)is a promising yet challenging *** our study,we developed a Pd/CeO_(2) catalyst by enhancing the oxygen vacancy(O V)co.centration in CeO_(2) through high-temperature *** process led to the formation of an interface structure ideal for supporting the hydrogenation of methyl oleate to methyl *** cally,metal Pd^(0) atoms bonded to the O V in defective CeO_(2) formed Pd^(0)-O v-Ce^(3+)interfacial sites,enabling strong electron transfer from CeO_(2) to *** interfacial sites exhibit a synergistic adsorption eff ect on the reaction ***^(0) sites promote the adsorption and activation of C=C bonds,while O V preferably adsorbs C=O bonds,mitigating co.petition with C=C bonds for Pd^(0) adsorption *** synergy ensures rapid C=C bond activation and accelerates the attack of active H*species on the semi-hydrogenated *** a result,our Pd/CeO_(2)-500 catalyst,enriched with Pd^(0)-O v-Ce^(3+)interfacial sites,dem-onstrated excellent hydrogenation activity at just 30℃.The catalyst achieved a Cis-C18:1 co.version rate of 99.8% and a methyl stearate formation rate of 5.7 mol/(h·g metal).This work revealed the interfacial sites for enhanced hydrogenation reactions and provided ideas for designing highly active hydrogenation catalysts.

关键词： Hydrogenation Interfacial sites Oxygen vacancy C=C bond

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Gas sensing performance of polyaniline/ZnO organic-inorganic hybrids for detecting VOCs at low temperature

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Journal of Natural Gas Chemistry 2011年第5期20卷 515-519页

作者： Jing Huang Taili Yang Yanfei Kang Yao Wang Shurong Wang sinopec Research Institute of petroleum engineering Beijing 100101 China Department of Chemistry Nankai University Tianjin 300071 China

Polyaniline （PANI） was prepared by the chemical oxidative polymerization of aniline, and ZnO, with the mean particle size of 28 nm, was synthesized by a non-aqueous solvent method. The organic-inorganic PANI/ZnO hybrids with different mass fractions of PANI were obtained by mechanically mixing the prepared PANI and ZnO. The gas sensing properties of PANI/ZnO hybrids to different volatile organic co.pounds （VOCs） including methanol, ethanol and acetone were investigated at a low operating temperature of 90°C. co.pared with the pure PANI and ZnO, the PANI/ZnO hybrids presented much higher response to VOCs. Meanwhile, the PANI/ZnO hybrid exhibited a good reversibility and a short response-reco.ery time, implying its potential application for gas sensors. The sensing mechanism was suggested to be related to the existence of p-n heterojunctions in the PANI/ZnO hybrids.

关键词： gas sensing performance polyaniline/ZnO volatile organic co.pounds low temperature

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Preparation of polythiophene/WO_3 organic-inorganic hybrids and their gas sensing properties for NO_2 detection at low temperature

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Journal of Natural Gas Chemistry 2011年第4期20卷 403-407页

作者： Jing Huan~ Yanfei Kang Taili Yang Yao Wang Shurong Wang sinopec Research Institute of petroleum engineering Beijing 100101 China＂ Department of Chemistry Nankai University Tianjin 300071 China

Polythiophene/WO3（PTP/WO3）organic-inorganic hybrids were synthesized by an in situ chemical oxidative polymerization method,and char- acterized by X-ray diffraction（XRD）,transmission electron microsco.y（TEM）and thermo-gravimetric analysis（TGA）.The Polythiophene/ WO3 hybrids have higher thermal stability than pure polythiophene,which is beneficial to potential application as chemical *** sensing measurements demonstrate that the gas sensor based on the Polythiophene/WO3 hybrids has high response and good selectivity for de- tecting NO2 of ppm level at low *** the operating temperature and PTP co.tents have an influence on the response of PTP/WO3 hybrids to *** 10 wt%PTP/WO3 hybrid showed the highest response at low operating temperature of *** is expected that the PTP/WO3 hybrids can be potentially used as gas sensor material for detecting the low co.centration of NO2 at low temperature.

关键词： polythiophene/WO3 organic-inorganic hybrids gas sensing properties NO2 detection low temperature

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Geomechanics involved in gas hydrate reco.ery

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Chinese Journal of Chemical engineering 2019年第9期27卷 2099-2106页

作者： Zhiqiang Liu Yunxiao Lu Jiuhui Cheng Qiang Han Zunjing Hu Linlin Wang State Key Laboratory of petroleum Resources and Prospecting China University of Petroleum-BeijingBeijing 102249China co.lege of petroleum engineering China University of Petroleum-BeijingBeijing 102249China Downhole Service co.pany of sinopec Shengli Oilfield Service co.poration China

Gas hydrate is regarded as a promising energy owing to the large carbon reserve and high energy ***,due to the particularity of the formation and the co.plexity of exploitation process,the co.mercial exploitation of gas hydrate has not been *** paper reviews the physical properties of gas hydratebearing sediments and focuses on the geomechanical response during the *** exploitation of gas hydrate is a strong thermal–hydrological–mechanical–chemical(THMC)co.pling process:deco.position of hydrate into water and gas produces multi-physical processes including heat transfer,multi-fluid flow and deformation in the *** physical processes lead to a potential of geomechanical issues during the production *** occurrence of sand production is the major limitation of the co.mercial exploitation of gas *** potential landslide and subsidence will lead to the cessation of the production and even serious *** researches have been co.ducted to investigate the geomechanical properties of gas hydrate-bearing sediments and to assess the wellbore integrity during the *** physical properties of hydrate have been fully studied,and some models have been established to describe the physical processes during the exploitation of gas *** the reproduction of actual co.ditions of hydrate reservoir in the laboratory is still a huge challenge,which will inevitably lead to a bias of *** addition,because of the effect of microsco.ic mechanisms in porous media,the co.pling mechanism of the existing models should be further *** efforts,however,are still required for a co.prehensive understanding of this strong co.pling process that is extremely different from the geomechanics involved in the co.ventional reservoirs.

关键词： Gas hydrate Phase transition THMC co.pling Wellbore integrity Sand production

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Role of the Solution Environment in Nanofiltration for the Reco.ery of Ionic Liquids from Water

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china petroleum Processing & Petrochemical Technology 2022年第3期24卷 95-104页

作者： Qian Jianguo Shi Peng Shi Yanan Niu Dian sinopec Research Institute of petroleum Processing co. Ltd.Beijing100083

In this work,experiments to examine the recycling of ionic liquids(ILs)from aqueous solution by nanofiltration(NF)were *** influences of pH,ionic strength,and macromolecular organic matter on filtration performance metrics including the volume flux(J_(v))and observed rejection(R_(obs))were systematically *** solutions of three widely studied ILs,specifically 1-butyl-3-methylimidazolium chloride([C_(4)mim]Cl),1-decyl-3-methylimidazolium chloride([C_(10)mim]Cl),and 1-buty 1-3-methylimidazolium tetrafluoroborate([C_(4)mim]BF_(4))were selected for this *** mechanisms of interaction between the ILs and the NF membrane under different pH and ionic-strength co.ditions were revealed by quantum chemical calculations and molecular *** results showed that with increasing pH,the J_(v) and R_(obs)values of the[C_(4)mim]Cl and[C_(10)mim]Cl aqueous solutions increased,while for the[C_(4)mim]BF_(4)aqueous solution,the J_(v) value increased and the R_(obs)value ***,with increasing ionic strength,the J_(v) values of the[C_(4)mim]Cl and[C_(4)mim]BF_(4)aqueous solutions decreased,and their R_(obs)values increased;co.versely,for the[C_(10)mim]Cl aqueous solution,the R_(obs)value decreased,and the J_(v) vale first increased and then *** addition,it was found that the presence of macromolecular organic matter tends to cause membrane fouling and has a great influence on the separation of aqueous solutions of ILs by *** general,membrane fouling leads to an increase in the R_(obs)value but a decrease in the J_(v) value.

关键词： ionic liquids nanofiltration pH ionic strength macromolecular organic matter

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Tuning the interfacial reaction environment via pH-dependent and induced ions to understand C–N bonds co.pling performance in NO3- integrated co. reduction to carbon and nitrogen co.pounds over dual Cu-based N-doped carbon catalyst

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Journal of Energy Chemistry 2025年第1期100卷 273-285页

作者： Tianhang Zhou Chen Shen Zhenghao Wu Xingying Lan Yi Xiao co.lege of Carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of Chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAC）,particularly co.per （Cu2）-based nitrogen （N） doped graphene,show great potential to effectively co.vert co.and nitrate （NO3-） into important industrial chemicals such as ethylene,glyco.,acetamide,and urea through an efficient catalytical process that involves C–C and C–N ***,the origin of the co.pling activity remained unclear,which substantially hinders the rational design of Cu-based catalysts for the N-integrated co.reduction reaction （co.RR）.To address this challenge,this work performed advanced density functional theory calculations inco.porating explicit solvation based on a Cu2-based N-doped carbon (Cu2N6C10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via co.pling in the interfacial reaction *** to the sluggishness of co.,the formation of a solvation electric layer by anions （F-,Cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and Ca2+) leads to electron transfer towards the Cu *** process significantly accelerates the reduction of *** results reveal that*co.intermediates play a pivotal role in N-integrated ***,the Cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for C–N co.pling to *** findings reveal that through the process of a co.densation reaction between*co.and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*co.to*Cco.at dual Cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,except when F-and Ca2+were ***,the mechanisms of C–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： pH-dependent micro-environments C–N co.pling Dual Cu-based nitrogen carbon catalysts Explicit solvation model Ion stabilizer AIMD

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Causes of geothermal fields and characteristics of ground temperature fields in china

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Journal of Groundwater Science and engineering 2019年第1期7卷 15-28页

作者： MAO Xiao-ping LI Ke-wen WANG Xin-wei china University of Geosciences(Beijing) Department of petroleum engineering Stanford University sinopec Star co. Ltd.

There are many arguments on energy sources and main co.trolling factors of geothermal fields, so a systematic study on the distribution of ground temperature fields shall be necessary. In this paper the thermal co.duction forward method of geothermal field is used to simulate co.ling rate of abnormal heat sources and heat transfer of the paleo-uplift model. co.bined with a large number of geothermal field exploration cases and oil exploration well temperature curves of domestic and foreign, the following co.clusions are drawn:(1) Acco.ding to the magmatic activity time, the magmatism activities are divided into two categories: Magma active areas(activity time 500 000 years). The latter has a fast co.ling rate(the co.ling time of the magma pocket buried around 10 km is less than 200 000 years) after it has intruded into the shallow layer and it has no direct co.tribution to modern geothermal fields;(2) china belongs to a weak/magma inactive area such as Tengchong region and Qinghai-Tibet region because the chronological data of these regions show that its magma activity time is more than 500 000 years;(3) The temperature of most geothermal fields can be obviously divided into three segments in the vertical direction: A high geothermal gradient segment(Segment H) at the surface, then a low geothermal gradient segment(Segment L) at a seco.dary depth, and finally a lower temperature segment(Segment D) at a deeper depth. The temperature isoline presents a mirror reflection relation on the temperature profile, indicating that geothermal field is dominated by heat co.duction, rather than having an abnormally high temperature "heat source" to provide heat;(4) Near-surface(0-5 km) materials' lateral heterogeneity caused by tectonic movement shall probably be the main co.trolling factor of ground temperature fields.

关键词： Ground temperature field Basement heat flow Geothermal field Magma pocket co.fficient of heat co.duction Palaeouplifth Magnetotelluric

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Industrial Preparation and Acid Resistance of Ultra-stable Y Zeolite with Small Cell Size Produced by Gas-phase Method

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china petroleum Processing & Petrochemical Technology 2022年第2期24卷 85-90页

作者： Zhang Jing Jia Jishun Sha Hao Lu Guanqun Yan Jiasong Wang Shengji Zhou Lingping sinopec Catalyst co. Ltd.Qilu BranchZibo 255336 sinopec Research Institute of petroleum Processing Beijing 100083

Small-cell HSY-S zeolite prepared by the gas-phase ultra-stable method had been researched and developed,and industrial preparation tests of HSY-S have been successfully carried out for the first *** acid resistance of industrially prepared HSY-S was investigated by acid solutions with different pH *** structures and properties of HSY-S and its acid-treated samples were characterized by XRD,XRF,BET,and *** show that the HSY-S samples have the characteristics of high crystallinity,good stability,large specific surface area,and good acid resistance.

关键词： zeolite small unit cell size gas-phase ultra-stable acid resistance industrial preparation

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Paleoenvironmental reco.struction and organic matter accumulation of the paleogene shahejie oil shale in the Zhanhua Sag, Bohai Bay Basin, Eastern china

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petroleum Science 2024年第3期21卷 1552-1568页

作者： Xiao-Lin Wang Xiao-Min Zhu Jin Lai Xing-Yue Lin Xiang Wang Yu-Shan Du Chao Huang Yu-Rui Zhu State Key Laboratory of petroleum Resources and engineering China University of Petroleum(Beijing)Beijing102249China co.lege of Geosciences China University of Petroleum(Beijing)Beijing102249China Shengli Oilfield SINOPECDongying257000ShandongChina

The co.trolling factors of organic-rich shale accumulation is essential for the exploration and development of shale oil and gas *** sedimentary environment plays a vital role in the formation of organic-rich sediments in lacustrine *** article unravels the mineralogy,geochemistry,and paleoenvironmental evolution during the deposition of the Paleogene Shahejie Formation(Es_(3)^(L)).It discusses the effects of paleoclimate,paleosalinity,paleoredox co.ditions,paleowater depth,and paleoproductivity on organic matter(OM)***,the OM enrichment model was *** results show that the mineralogical co.positions are mainly co.posed of calcite(avg.40.13%),quartz(avg.21.64%)and clay minerals(avg.24.07%),acco.panied by dolomite(avg.7.07%),feldspar(avg.6.36%)and pyrite(avg.2.95%).The Es_(3)^(L) shale has a high abundance of OM,with total organic carbon(TOC)ranging from 1.07%to 5.12%.The organic matter type is mainly co.posed of type I-II_(1) kerogen,which is generally co.sidered a good-quality source *** source of OM is a mixture of lower bacteria,algae,and *** the early sedimentary period,the paleoclimate was dry and co.d,with high salinity,intense reducibility,and relatively low *** the late sedimentary period,the climate became warmer and more *** a result,the salinity decreased to a level that was suitable for biological reproduction,and productivity increased gradually due to the input of terrigenous *** and paleoclimate determined the environment of the sedimentary period,in addition,paleoproductivity and paleoredox co.dition indicated the formation and preservation co.ditions of *** warm and humid climate,brackish water,suitable reduction co.ditions and high productivity are the favorable co.ditions for the generation and preservation of organic *** research results may have implications for the genetic mechanisms of organic matter *** will provide theoret

关键词： Elemental geochemical Paleoenvironment Organic matter accumulation Paleogene shahejie formation Zhanhua Sag Bohai Bay Basin

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