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An approximate analytical model for unconventional reservoir considering variable matrix blocks and simultaneous matrix depletion

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Petroleum Science 2024年第1期21卷 352-365页

作者： Kai-xuan qiu Jia Li Dong Feng Shi-Ming Wei Gang Lei Jiangmen Laboratory of Carbon Science and Technology Jiangmen529100GuangdongChina The Hong Kong University of Science and Technology(Guangzhou) Guangzhou511400GuangdongChina China University of Geosciences(Beijing) Beijing100083China China University of Petroleum(Beijing) Beijing102249China China University of Geosciences(Wuhan) Wuhan430074HubeiChina Shenzhen Research Institute China University of GeosciencesShenzhen518063GuangdongChina

In regard to unconventional oil reservoirs,the transient dual-porosity and triple-porosity models have been adopted to describe the fluid flow in the complex fracture *** has been proven to cause inaccurate production evaluations because of the absence of matrix-macrofracture *** addition,most of the existing models are solved analytically based on Laplace transform and numerical ***,an approximate analytical solution is derived directly in real-time space considering variable matrix blocks and simultaneous matrix *** simplify the derivation,the simultaneous matrix depletion is divided into two parts:one part feeding the macrofractures and the other part feeding the ***,a series of partial differential equations(PDEs)describing the transient flow and boundary conditions are constructed and solved analytically by ***,a relationship between oil rate and production time in real-time space is *** new model is verified against classical analytical *** the microfracture system and matrix-macrofracture communication is neglected,the result of the new model agrees with those obtained with the dual-porosity and triple-porosity model,***,the new model also has an excellent agreement with the numerical *** model is then applied to two actual tight oil wells completed in western Canada sedimentary *** identifying the flow regime,the solution suitably matches the field production data,and the model parameters are *** these output parameters,we can accurately forecast the production and even estimate the petrophysical properties.

关键词： Analytical solution Unconventional reservoir Variable matrix Simultaneous flow

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Influence of Recycled Concrete Fine Powder on Durability of Cement Mortar

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Fluid Dynamics & Materials Processing 2024年第1期20卷 45-58页

作者： Yadong Bian xuan qiu Jihui Zhao Zhong Li Jiana Ouyang School of Architectural and Civil Engineering Zhongyuan University of TechnologyZhengzhou450007China School of Civil Engineering Sun Yat-Sen University&Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai519082China

In this paper,the durability of cement mortar prepared with a recycled-concrete fine powder(RFP)was examined;including the analysis of a variety of aspects,such as the carbonization,sulfate attack and chloride ion erosion *** results indicate that the influence of RFP on these three aspects is *** carbonization depth after 30 days and the chloride diffusion coefficient of mortar containing 10%RFP decreased by 13.3%and 28.19%.With a further increase in the RFP content,interconnected pores formed between the RFP particles,leading to an acceleration of the penetration rate of CO_(2)and Cl^(−).When the RFP content was less than 50%,the corrosion resistance coefficient of the compressive strength of the mortar was 0.84-1.05 after 90 days of sulfate *** the expansion and cracking of the mortar was effectively alleviated due to decrease of the gypsum *** electron microscope(SEM)analysis has confirmed that 10%RFP contributes to the formation of a dense microstructure in the cement mortar.

关键词： Recycled concrete fine powder cement mortar carbonization sulfate chloride ion durability

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Production induced fracture closure of deep shale gas well under thermo-hydro-mechanical conditions

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Petroleum Science 2024年第3期21卷 1796-1813页

作者： Shi-Ming Wei Yang Xia Yan Jin Xu-Yang Guo Jing-Yu Zi Kai-xuan qiu Si-Yuan Chen College of Science China University of Petroleum(Beijing)Beijing102249China CNOOC Research Institute Ltd Beijing100028China The University of Hong Kong Hong Kong999077China

Deep shale gas reservoirs have geological characteristics of high temperature,high pressure,high stress,and inferior ability to pass through *** multi-stage fractured horizontal well is the key to exploiting the deep shale gas ***,during the production process,the effectiveness of the hydraulic fracture network decreases with the closure of fractures,which accelerates the decline of shale gas *** this paper,we addressed the problems of unclear fracture closure mechanisms and low accuracy of shale gas production prediction during deep shale gas *** we established the fluid—solid—heat coupled model coupling the deformation and fluid flow among the fracture surface,proppant and the shale *** the fluid—solid—heat coupled model was applied to the fracture network,it was well solved by our numerical method named discontinuous discrete fracture *** with the conventional discrete fracture method,the discontinuous discrete fracture method can describe the three-dimensional morphology of the fracture while considering the effect of the change of fracture surface permeation coefficient on the coupled fracture—matrix flow and describing the displacement discontinuity across the *** simulations revealed that the degree of fracture closure increases as the production time proceeds,and the degree of closure of the secondary fractures is higher than that of the primary *** creep and proppant embedment both increase the degree of fracture *** reduction in fracture surface permeability due to proppant embedment reduces the rate of fluid transfer between matrix and fracture,which has often been overlooked in the ***,it significantly impacts shale gas production,with calculations showing a 24.7%cumulative three-year yield *** study is helpful to understand the mechanism of hydraulic fracture ***,it provides the theoretical guidance for maintaining the long

关键词： Shalegas Fracture closure Fluid-solid-heat coupling Discontinuous discrete fracture

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Microbially-mediated formation of Ca-Fe carbonates during dissimilatory ferrihydrite reduction:Implications for the origin of sedimentary ankerite

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Science China Earth Sciences 2024年第1期67卷 208-221页

作者： Deng LIU Jinpeng CAO Shanshan YANG Yating YIN Pengcong WANG Dominic PAPINEAU Hongmei WANG xuan qiu Genming LUO Zongmin ZHU Fengping WANG State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China School of Environmental Studies China University of GeosciencesWuhan 430074China London Centre for Nanotechnology University College LondonLondon WC1H 0AHUK Department of Earth Sciences University College LondonLondon WC1E 6BTUK Center for Planetary Sciences University College London and Birkbeck College LondonLondon WC1E 6BTUK State Key Laboratory of Microbial Metabolism State Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The origin of sedimentary dolomite has become a long-standing problem in the Earth *** carbonate minerals like ankerite have the same crystal structure as dolomite,hence their genesis may provide clues to help solving the dolomite *** purpose of this study was to probe whether microbial activity can be involved in the formation of ***-carbonation experiments associated with microbial iron reduction were performed in batch systems with various concentrations of Ca^(2+)(0–20 mmol/L),with a marine iron-reducing bacterium Shewanella piezotolerans WP3 as the reaction mediator,and with lactate and ferrihydrite as the respective electron donor and *** biomineralization data showed that Ca-amendments expedited microbially-mediated ferrihydrite reduction by enhancing the adhesion between WP3 cells and ferrihydrite *** bioreduction,siderite occurred as the principal secondary mineral in the Ca-free ***,Ca-Fe carbonates were formed when Ca^(2+)ions were *** CaCO_(3) content of microbially-induced Ca-Fe carbonates was positively correlated with the initial Ca2+*** Ca-Fe carbonate phase produced in the 20 mmol/L Ca-amended biosystems had a chemical formula of Ca_(0.8)Fe_(1.2)(CO_(3))_(2),which is close to the theoretical composition of *** ankeritelike phase was nanometric in size and spherical,Ca-Fe disordered,and structurally *** simulated diagenesis experiments further demonstrated that the resulting ankerite-like phase could be converted into ordered ankerite under hydrothermal *** introduced the term“proto-ankerite”to define the Ca-Fe phases that possess near-ankerite stoichiometry but disordered cation *** the basis of the present study,we proposed herein that microbial activity is an important contributor to the genesis of sedimentary ankerite by providing the metastable Ca-Fe carbonate precursors.

关键词： Ankerite Proto-ankerite Microbial iron reduction Dolomite problem Mineral transformation

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Green synthesis of luminescent La-MOF nanoparticle from waste poly(ethylene terephthalate) for high-performance in Fe(Ⅲ) detection

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Rare Metals 2024年第8期43卷 3833-3843页

作者： Zhi Gong Zhi-Kui Dai Zhi-Yue Dong qiu-xuan Liu Valentin A.Milichko Hua-Jian Liu Jie Liu Ran Niu Jiang Gong Key Laboratory of Material Chemistry for Energy Conversion and Storage Hubei Key Laboratory of Material Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSemiconductor Chemistry CenterSchool of Chemistry and Chemical EngineeringMinistry of EducationHuazhong University of Science and TechnologyWuhan 430074China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430073China Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China School of Physics and Engineering ITMO UniversitySt.Petersburg197101Russia School of Materials Science and Engineering Hubei UniversityWuhan430062China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing School of Mechanical and Automotive EngineeringKey Laboratory of Polymer Processing EngineeringMinistry of EducationSouth China University of TechnologyGuangzhou 510641China

Developing luminescent metal-organic frameworks(MOFs) capable of high-efficiency Fe^(3+)sensing has aroused great attraction in the fields of biology,chemistry,***,previous solvothermal methods are limited by organic solvent usage,time consuming,high pressure,and high-energy ***,we propose the waste-toMOF strategy towards the scale-up production of La-MOF nanoparticles through the ball milling of recycled poly(-ethylene terephthalate)(PET) bottles and La(NO_(3))_(3)·_(6)H_(2)*** goes on alkaline hydrolysis to form 1,4-benzenedicarboxylic acid sodium salt(Na_(2)BDC) and ethylene glycol by ball ***,BDC reacts with La^(3+)to form *** as-prepared La-MOF crystal nanoparticles possess a rod-like morphology with the size of few hundred ***,La-MOF nanoparticles display high selectivity and sensitivity for Fe^(3+)*** quenching constant and limit of detection are 5.29×10^(3)(mol·L^(-1))^(-1) and 0.147 μmol·L^(-1),respectively,thus surpassing many advanced Fe^(3+) *** to the result of density functional theory,the high Fe^(3+) detection performance of La-MOF is related to the complexing of Fe^(3+)with La-MOF,which leads to the gradual dissociation of the coordination bond between terephthalic acid and La^(3+).It is anticipated that the mechanochemistry milling-based wasteto-MOF strategy provides a new platform for the massive production of functional MOFs in a green manner.

关键词： Metal-organic framework Waste polyester Mechanochemistry milling Fluorescence sensor

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基于老年综合评估指导下的针对性护理对老年糖尿病患者的护理效果分析

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首都食品与医药 2024年第8期31卷 123-125页

作者：邱旋江苏省中医院钟山院区(江苏省中医院钟山院区健康管理中心) 江苏南京210014

目的探讨基于老年综合评估指导开展针对性护理在老年糖尿病患者中的应用效果。方法选择江苏省中医院钟山院区2020年1月-2023年8月收治的老年糖尿病患者66例,以随机数字表法分组,对照组(n=33)采用常规护理,观察组(n=33)则采用基于老年综... 详细信息

目的探讨基于老年综合评估指导开展针对性护理在老年糖尿病患者中的应用效果。方法选择江苏省中医院钟山院区2020年1月-2023年8月收治的老年糖尿病患者66例,以随机数字表法分组,对照组(n=33)采用常规护理,观察组(n=33)则采用基于老年综合评估指导下的针对性护理干预,比较两组干预前后血糖指标,评估综合评估量表检测结果,并对比护理满意度。结果干预后观察组空腹血糖(6.92±1.15)mmol/L、餐后2h血糖(9.45±1.77)mmol/L、糖化血红蛋白(6.83±0.74)%,低于对照组(P<0.05);ADL(64.78±9.44)分、MMSE(27.16±2.49)分,高于对照组(P<0.05);GDS(8.34±1.20)分、MFS(38.51±8.82)分、SGA(9.27±1.79)分,低于对照组(P<0.05);满意度高于对照组(P<0.05)。结论对老年糖尿病患者基于老年综合评估指导进行针对性护理能降低血糖水平,可改善患者预后,提高护理满意度。

关键词：老年综合评估针对性护理老年糖尿病血糖满意度

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国际原油市场2023年回顾和2024年展望

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油气与新能源 2024年第2期36卷 18-24页

作者：张庆辰仇玄张迪中国石油天然气股份有限公司规划总院北京100083

近年来,国际油价在“OPEC+”产量政策、美联储货币政策、地缘局势动荡等因素影响下震荡加剧,对石油企业的生产经营造成了巨大挑战。以国际油价演变为主线,从供需、地缘、金融等角度回顾了2023年国际原油市场的特点:从需求侧看,欧美需求... 详细信息

近年来,国际油价在“OPEC+”产量政策、美联储货币政策、地缘局势动荡等因素影响下震荡加剧,对石油企业的生产经营造成了巨大挑战。以国际油价演变为主线,从供需、地缘、金融等角度回顾了2023年国际原油市场的特点:从需求侧看,欧美需求由“降”转“稳”,中国、印度两国带动全球原油需求稳定增长;从供给侧看,“OPEC+”坚持减产保价策略不动摇,美国、伊朗成为主要增产国;叠加地缘冲突加剧、欧美央行维持高利率,国际油价宽幅波动,布伦特原油均价为82美元/桶,同比下降16.8%。立足关键要素的边际变化,从需求增幅收窄、“OPEC+”延长减产、美元进入降息周期及地缘博弈持续等维度展望了2024年国际原油市场,得出全年油价或同比小幅上行的结论,以期为油气行业生产经营提供决策参考。

关键词：国际原油市场供应需求油价

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Live microbial cells adsorb Mg2＋ more effectively than lifeless organic matter

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Frontiers of Earth Science 2018年第1期12卷 160-169页

作者： xuan qiu Yanchen YAO Hongmei WANG Yong DUAN State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Wuhan 430074 China School of Environmental Studies China University of Geosciences Wuhan 430074 China

The Mg2＋ content is essential in determining different Mg-CaCO3 minerals. It has been demonstrated that both microbes and the organic matter secreted by microbes are capable of allocating Mg2＋ and Ca2＋ during the formation of Mg-CaCO3, yet detailed scenarios remain unclear. To investigate the mechanism that microbes and microbial organic matter potentially use to mediate the allocation of Mg2＋ and Ca2＋ in inoculating systems, microbial mats and four marine bacterial strains （Synecho- coccus elongatus, Staphylococcus sp., Bacillus sp., and Desulfovibrio vulgaris） were incubated in artificial sea- water media with Mg/Ca ratios ranging from 0.5 to 10.0. At the end of the incubation, the morphology of the microbial mats and the elements adsorbed on them were analyzed using scanning electronic microscopy （SEM） and energy diffraction spectra （EDS）, respectively. The content of Mg2＋ and Ca2＋ adsorbed by the extracellular polysaccharide substances （EPS） and cells of the bacterial strains were analyzed with atomic adsorption spectroscopy （AAS）. The functional groups on the surface of the cells and EPS of S. elongatus were estimated using automatic potentiometric titration combined with a chemical equilibrium model. The results show that live microbial mats generally adsorb larger amounts of Mg2＋ than Ca2＋, while this rarely is the case for autoclaved microbial mats. A similar phenomenon was also observed for the bacterial strains. The living cells adsorb more Mg2＋ than Ca2＋, yet a reversed trend was observed for EPS. The functional group analysis indicates that the cell surface of S. elongatus contains more basic functional groups （87.24%）, while the EPS has more acidic and neutral functional groups （83.08%）. These features may be responsible for the different adsorption behavior of Mg2＋ and Ca2＋ by microbial cells and EPS. Our work confirms the differ-ential Mg2＋ and Ca2＋ mediation by microbial cells and EPS, which may provide insight into the processes that microbes use to

关键词： microbe adsorption magnesium calcium

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燃煤锅炉高温腐蚀气体激光在线监测设备研究

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中国光学（中英文） 2024年第5期17卷 1060-1067页

作者：李龙师帅宫廷田亚莉郭古青邱选兵熊小鹤李传亮太原科技大学应用科学学院山西省精密测量与在线检测装备工程研究中心山西省光场调控与融合应用技术创新中心山西太原030024 西安交通大学热流科学与工程教育部重点实验室陕西西安710049

燃煤锅炉燃烧场的经济性、安全性和环保性对于智慧电厂建设具有重要意义。H2S和CO是燃煤锅炉燃烧场的两种主要高温腐蚀气体,它们不仅腐蚀锅炉近壁面,尾气对大气环境的危害也极其严重。基于近红外可调谐半导体激光吸收光谱技术,结合波长... 详细信息

燃煤锅炉燃烧场的经济性、安全性和环保性对于智慧电厂建设具有重要意义。H2S和CO是燃煤锅炉燃烧场的两种主要高温腐蚀气体,它们不仅腐蚀锅炉近壁面,尾气对大气环境的危害也极其严重。基于近红外可调谐半导体激光吸收光谱技术,结合波长调制光谱技术和频分复用技术,研制了一款无人值守的燃煤锅炉主燃区的H_(2)S和CO气体浓度实时在线监测设备。仿真模拟了6335~6341 cm^(-1)范围内的气体吸收光谱,并选定1.5μm附近的近红外激光器作为激光光源。研制了一套耐高温耐腐蚀的Herriott型多光程池,使激光与气体相互作用的有效光程达15 m;开发了硬件电路及相应的固件程序,实现了H2S和CO吸收光谱信号的二次解调与浓度反演。线性度和Allan方差实验表明,其线性拟合相关系数分别为0.9998和0.9995,在73 s和53 s的积分时间下,H_(2)S和CO的最低检测极限分别为0.2×10^(-6) mol/mol和0.344×10^(-6) mol/mol。最后,将研制的设备在某300 MW电负荷的四角切圆燃煤锅炉主燃区燃烧气氛场进行应用示范,对水冷壁附近的H2S和CO进行同步测量。结果表明,锅炉中H2S和CO的浓度呈正相关,厌氧燃烧会导致两种气体的含量增加,造成对水冷壁的腐蚀。

关键词：锅炉水冷壁腐蚀波长调制光谱频分复用高温多光程吸收池长期在线监测

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Microbial roles equivalent to geological agents of high temperature and pressure in deep Earth

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Science China Earth Sciences 2016年第11期59卷 2098-2104页

作者： XIE ShuCheng LIU Deng qiu xuan HUANG XianYu Thomas J.ALGEO State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Laboratory of Critical Zone Evolution School of Earth Sciences China University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Department of Geology University of Cincinnati

Microbes not only show sensitive responses to environmental changes but also play important roles in geochemical and geophysical systems. It is well known that microbes have caused major changes in surface environments and biogeochemical cycles through Earth history. Microbial processes can also induce the synthesis of certain minerals under Earth-surface conditions that previously were believed to form only under high temperatures and pressures in the deep Earth. For example, microbes can promote the conversion of smectite to illite, synthesis of authigenic plagioclase, precipitation of dolomite, and biotransformation of geolipids. These effects of microbes are due to their large surface/volume ratios, enzyme production, and abundant functional groups. Microbial catalyzation of chemical reactions proceeds through reaction-specific enzymes, a decrease in Gibbs' s free energy, and/or break through the dynamics reaction thresholds via their metabolisms and physiology. Microbes can lower the surface free energy of mineral nuclei via biophysical adsorption due to their large surface/volume ratios and abundant functional groups. The mineral precipitation and transformation processes induced by microbes are functionally equivalent to geological processes operating at high temperatures and pressures in the deep Earth, suggesting that microbial processes can serve as analogs to deep abiotic processes that are difficult to observe.

关键词： Geobiology Microbial functional groups Illitization Plagioclase Dolomite Geolipids

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