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Study on hydrodynamic diffusion law of the swelling particle slurry in karst pipeline

Particuology 2024年第4期87卷 218-231页

作者： Bingchuan Cheng Haibo Li Guangming Pan Runhuai Deng Yu'an Gong Shujun Xu Kun Zhou Zhuo Zheng School of Civil Engineering Geotechnical and Structural Engineering Research CenterShandong UniversityJinan250061China the fourth prospecting of shandong coal geology bureau Weifang261000China China Railway 14th bureau Group Corporation Limited Jinan250101China School of Trafic Engineering Shandong Jianzhu University.Fengming RoadLingang Development ZoneJinan250101China

The swelling particle grouting material has demonstrated remarkable plugging effectiveness in high-pressure and large-flow burst water within karst ***,current research on the rheolog-ical model,flow computation theory,and plugging mechanism of this material is *** conven-tional grouting slurry diffusion process,using the liquid-liquid two-phase flow method,fails to accurately simulate high solubility slurry and particle *** address these limitations,this study established a precise constitutive model to describe the swelling particle slurry diffusion process in dynamic ***,a coupling calculation method was proposed to analyze the spatiotemporal heterogeneity of viscosity during slurry diffusion by considering the migration of slurry and the changes in *** investigate the interaction between particle swelling and flow field changes,a Compu-tational Fluid Dynamics-Discrete Element Method(CFD-DEM)coupling model was developed for the diffusion of swelling particle *** is demonstrated that slurry viscosity increases exponentially within the diffusion front as the particle swelling rate rises,and the drag force exhibits an intriguing behavior of initially increasing and then decreasing as the slurry flows through the ***-more,the CFD-DEM coupling model proved to be more accurate in describing viscosity distribution and diffusion distance compared to the finite element *** primary objective of this paper is to reveal the plugging mechanism and provide theoretical support for the engineering application of the swelling particle grouting material.

关键词： Karst pipeline Swelling particle grouting material Dynamic water diffusion Spatiotemporal variation of viscosity CFD-DEM coupling model

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Hydrochemical Characterization,Controlling Factors and Water Quality of Surface Water in shandong Province,North China

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Journal of Earth Science 2024年第1期35卷 155-166页

作者： Ran An Jiutan Liu Zongjun Gao Changsuo Li Yuming Peng School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China 801 Institute of Hydrogeology and Engineering geology Shandong Provincial Bureau of Geology&Mineral ResourcesJinan 250014China Key Laboratory of Groundwater Resources and Environment Shandong Provincial Bureau of Geology&Mineral ResourcesJinan 250014China shandong Engineering Research Center for Groundwater Environmental Protection and Remediation Jinan 250014China

In this study,90 surface water samples were collected from shandong Province(SDP)in the dry and wet seasons and analyzed using statistical analysis,hydrochemical methods and water quality index(WQI).The content of main ions showed seasonal variations,with a higher average value in the dry season than in the wet *** points exhibiting high contents of the main chemical components were mainly distributed in areas southwest of SDP,north of Weifang,and around *** saturation index of carbonate minerals was greater than zero,while that of evaporite minerals was less than *** hydrochemical characteristics of surface water are mainly dominated by rock weathering as well as cation *** addition,surface water in SDP has significantly been affected by anthropogenic *** of the surface water could be classified as weakly alkaline soft-fresh water,with the hydrochemical types of SO_(4)·Cl-Ca·Mg and SO_(4)·*** terms of WQI,47.88% and 37.88% of the water samples in SDP were classified as poor water in the dry and wet seasons,*** the whole,the water quality is higher in the wet season than in the dry season,and surface water in SDP is generally suitable for agricultural irrigation.

关键词： surface water hydrochemical characteristics controlling factors water quality shandong Province

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Hydrocarbon Charging and Accumulation Process of the Large Bozhong19-6 Condensate Gas Reservoirs in the Southwestern Bozhong Sub-Basin,Bohai Bay Basin,China

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Journal of Earth Science 2024年第2期35卷 613-630页

作者： Quanyun Miao Changgui Xu Fang Hao Minjunshi Xie Qi Wang Jie Yin Huayao Zou General prospecting Institute of China National Administration of coal geology Beijing100039China State Key Laboratory of Petroleum Resource and prospecting China University of PetroleumBeijing102249China Tianjin Branch of China National Offshore Oil Company Ltd. Tianjin300452China School of Geosciences China University of PetroleumQingdao266580China School of Geosciences Yangtze UniversityWuhan430100China

The Bozhong19-6(BZ19-6)condensate gas reservoirs,located in the southwestern Bozhong sub-basin,Bohai Bay Basin,China,were paleo-oil reservoirs in the geological past and have undergone at least three successive hydrocarbon charging *** hydrocarbon migration and accumulation process of“early oil and late gas”has occurred in the current *** the end of the sedimentation of the Guantao Formation(N_(1)g,∼12 Ma),the reservoirs began to fill with first stage low-moderate mature crude *** the late stage of the Lower Minghuazhen Formation(N_(1)ml)(∼6.7 Ma),the reservoirs were largely charged with second stage high mature crude *** the deposition of the upper Minghuazhen Formation(N_(2)m^(u),∼5.1 Ma),the paleo-oil reservoirs were transformed into shallow Neogene reservoirs due to the reactivation of basement *** the late stage of the N_(2)m^(u)to the present day(∼2.8–0 Ma),the reservoirs were rapidly filled by natural gas within a short *** addition,analysis of the formation of the reservoir bitumen and the conspicuous loss of the lower molecular weight n-alkanes in the crude oil reveal that the injection of a large amount of gas in the late stage caused gas flushing of the early charged oil.

关键词： Bohai Bay Basin BZ19-6 condensate gas reservoirs fluid inclusions hydrocarbon charging and accumulation petroleum geology

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Inertinite in coal and its geoenvironmental significance:Insights from AI and big data analysis

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Science China Earth Sciences 2024年第6期67卷 1779-1801页

作者： Longyi SHAO Jiamin ZHOU Timothy PJONES Fanghui HUA Xiaotao XU Zhiming YAN Haihai HOU Dongdong WANG Jing LU State Key Laboratory for Fine Exploration and Intelligent Development of coal Resources and College of Geoscience and Surveying Engineering China University of Miningand Technology(Beijing)Beijing 100083China School of Earth and Environmental Sciences Cardiff UniversityCardiff CF103YEWalesEngland General prospecting Institute of China National Administration of coal geology Beijing 100039China Institute of Architectural Engineering Weifang UniversityWeifang 261061China College of Mining Liaoning Technical UniversityFuxin 123000China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

Inertinite,as an important and abundant maceral group in coal,is critical for the study of palaeowildfires and their roles in the Earth’s ***,there has been a significant amount of research on the relationship between palaeowildfire,palaeoclimate change and palaeovegetation evolution based on inertinite *** reflectance of fusinite and semifusinite has been used to estimate the combustion temperature and type of palaeowildfires,and then to evaluate the combustion characteristics of different types of *** relative abundance of inertinite can be used to estimate the atmospheric oxygen *** rapid development of artificial intelligence(AI)and online tools to search scientific databases has presented an opportunity for us to find,collect,arrange,and analyse data from the earliest to latest publications on *** data extraction tool Deep Shovel is used to collect and analyse global inertinite data from the Silurian to the *** software programs such as Gplates,ArcGIS pro and Tableau are then applied to model the relative abundance of inertinite over geological time,which can be correlated with other parameters such as atmospheric oxygen contents,plant evolution and palaeoclimate *** distribution of inertinite in coals varied over different geological periods,being typified by the“high inertinite content-high atmospheric oxygen level”period in the Permian and the“low inertinite content-low atmospheric oxygen level”period in the *** study has proposed a possible model of the positive and negative feedbacks between inertinite characteristics and palaeoenvironmental factors,and has revealed the exceptional role of inertinite in palaeoenvironmental *** research on inertinite will be focused on the integrated study of organic petrology and organic geochemistry of inertinite,the big data-driven research on the temporal and spatial distribution of the global inertinite,the exploration of the

关键词： Inertinite Palaeowildfires Atmospheric oxygen Palaeoclimates Palaeoecosystems

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Spatio-temporal Variation Characteristics of Extreme Climate Events and Their Teleconnections to Large-scale Ocean-atmospheric Circulation Patterns in Huaihe River Basin,China During 1959–2019

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Chinese Geographical Science 2024年第1期34卷 118-134页

作者： YAO Tian ZHAO Qiang WU Chuanhao HU Xiaonong XIA Chuan'an WANG Xuan SANG Guoqiang LIU Jian WANG Haijun School of Water Conservancy and Environment University of JinanJinan250022China Yangtze Institute for Conservation and Development Hohai UniversityNanjing210098China Zijin School of geology and Mining Fuzhou UniversityFuzhou350108China Water Research Institute of shandong Province Jinan250014China shandong Provincial bureau of Hydrology and Water Resources Jinan250100China

Huaihe River Basin(HRB) is located in China’s north-south climatic transition zone,which is very sensitive to global climate *** on the daily maximum temperature,minimum temperature,and precipitation data of 40 meteorological stations and nine monthly large-scale ocean-atmospheric circulation indices data during 1959–2019,we present an assessment of the spatial and temporal variations of extreme temperature and precipitation events in the HRB using nine extreme climate indices,and analyze the teleconnection relationship between extreme climate indices and large-scale ocean-atmospheric circulation *** results show that warm extreme indices show a significant(P < 0.05) increasing trend,while cold extreme indices(except for cold spell duration) and diurnal temperature range(DTR) show a significant decreasing ***,all extreme temperature indices show significant mutations during ***,a stronger warming trend occurs in eastern HRB than western HRB,while maximum 5-d precipitation(Rx5day) and rainstorm days(R25) show an increasing trend in the southern,central,and northwestern regions of *** oscillation(AO),Atlantic multidecadal oscillation(AMO),and East Atlantic/Western Russia(EA/WR) have a stronger correlation with extreme climate indices compared to other circulation *** and AMO(EA/WR) exhibit a significant(P < 0.05) negative(positive)correlation with frost days and diurnal temperature *** warm events are strongly correlated with the variability of AMO and EA/WR in most parts of HRB,while extreme cold events are closely related to the variability of AO and AMO in eastern *** contrast,AMO,AO,and EA/WR show limited impacts on extreme precipitation events in most parts of HRB.

关键词： extreme climate indices Sen’s slope variation mutation test atmospheric circulation indices Pearson’s correlation analysis Huaihe River Basin(HRB),China

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水-瓦斯耦合作用下煤岩抗压特性劣化试验研究

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Journal of Central South University 2024年第2期31卷 477-495页

作者：吕科江宁尹大伟孟书宇高志友吕涛 College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China General Institute of Exploration and Research of China National Administration of coal geology Beijing 100039China shandong geology and Mineral Resources Engineering Group Co. Ltd.Jinan 250013China

闭坑高瓦斯矿井中煤岩体在水和瓦斯的劣化作用下力学特性劣化,这将直接影响其稳定性和安全性。为研究水-瓦斯耦合作用下煤岩抗压特性,基于水-岩-气耦合试验系统,开展了浸泡环境下的全水浸(EW)、半水浸半气浸(WG)及全气浸(EG)煤样和干燥(... 详细信息

闭坑高瓦斯矿井中煤岩体在水和瓦斯的劣化作用下力学特性劣化,这将直接影响其稳定性和安全性。为研究水-瓦斯耦合作用下煤岩抗压特性,基于水-岩-气耦合试验系统,开展了浸泡环境下的全水浸(EW)、半水浸半气浸(WG)及全气浸(EG)煤样和干燥(CZ)煤样的单轴压缩试验,分析了煤样抗压强度及变形破坏特征,并从煤样浸泡前后的组分、宏观结构及破裂断口细观特征的角度,揭示了水-瓦斯耦合作用下煤岩的宏观、细观劣化机制。结果表明,在三种浸泡条件下,煤样抗压强度较干燥煤样均降低,EG组、WG组和EW组煤样抗压强度分别降低了18.92%、38.31%和53.45%,三种浸泡条件下煤样破坏模式由干燥煤样的剪切破坏转变为剪切-拉伸混合式破坏,破坏程度也随之增大,煤样由脆性破坏转变为塑性破坏,导致浸泡后煤样局部化带范围和错动程度增大;煤样在三种浸泡环境中劣化效果主要表现为:1)水和瓦斯的侵入导致煤样内部黏土矿物分解和析出,与CZ组相比,EG组、WG组和EW组煤样平均黏土矿物含量分别降低了3.8%、28.85%和45.94%,煤样孔隙结构发生改变;2)各组煤样浸泡后表面出现劣化效应,EG组表面孔隙发育程度劣于EW组,且EW组煤样表面出现剥落现象,WG组煤样水浸部分孔隙发育程度要胜于气浸部分;3)水和瓦斯的劣化作用使煤样内部孔隙结构发生改变,EW组、WG组和EG组煤样破裂断口平均孔隙率较CZ组分别增加了706.84%、362.95%、147.47%。在三种浸泡环境下煤样初始承载结构被破坏,降低了煤样破坏前储存能量的能力,破坏后煤样内部的剩余弹性能降低,耗散能增加,声发射累计振铃计数降低。上述研究对于认识闭坑高瓦斯矿井中煤岩体的稳定性具有一定的参考意义。

关键词：水-瓦斯耦合废弃矿井抗压特性劣化特性

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Large-scale physical simulation of injection and production of hot dry rock in Gonghe Basin,Qinghai Province,China

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Petroleum Exploration and Development 2024年第3期51卷 741-752页

作者： ZHAO Peng ZHU Haiyan LI Gensheng CHEN Zuo CHEN Shijie SHANGGUAN Shuantong QI Xiaofei State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Oil and Gas Reservoir geology and Exploitation Chengdu University of TechnologyChengdu 610059China College of Energy Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Petroleum Resources and prospecting China University of Petroleum(Beijing)Beijing 102249China Sinopec Research Institute of Petroleum Engineering Co.Ltd. Beijing 102206China The Second Geological Team of Hebei coal Field geology bureau(Hebei Hot Dry Rock Research Center) Xingtai 054000China

Based on the independently developed true triaxial multi-physical field large-scale physical simulation system of in-situ injection and production,we conducted physical simulation of long-term multi-well injection and production in the hot dry rocks of the Gonghe Basin,Qinghai Province,NW *** multi-well connectivity experiments,the spatial distribution characteristics of the natural fracture system in the rock samples and the connectivity between fracture and wellbore were *** injection and production wells were selected to conduct the experiments,namely one injection well and two production wells,one injection well and one production *** variation of several physical parameters in the production well was analyzed,such as flow rate,temperature,heat recovery rate and fluid *** results show that under the combination of thermal shock and injection pressure,the fracture conductivity was enhanced,and the production temperature showed a downward *** larger the flow rate,the faster the *** the local closed area of the fracture was gradually activated,new heat transfer areas were generated,resulting in a lower rate of increase or decrease in the mining *** heat recovery rate was mainly controlled by the extraction flow rate and the temperature difference between injection and production *** the conductivity of the leak-off channel increased,the fluid recovery of the production well rapidly *** influence mechanisms of dominant channels and fluid leak-off on thermal recovery performance are *** former limits the heat exchange area,while the latter affects the flow rate of the produced *** of them are important factors affecting the long-term and efficient development of hot dry rock.

关键词： hot dry rock simulation of injection and production heat extraction performance conductivity dominant channel fluid leak-off

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Geochronology and Geochemistry of the Xingxingxia Triassic A-type Granites in Central Tianshan,NW China:Petrogenesis and Tectonic Implications

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 337-351页

作者： HUANG Zengbao LI Xiyao ZHAO Hao LU Qing Geological Survey of Gansu Province Lanzhou 735000China Key Laboratory of Submarine Geosciences and prospecting Techniques MOE and College of Marine GeosciencesOcean University of ChinaQingdaoShandong 266100China Research Institute of Petroleum Exploration and Development Shengli OilfieldSINOPECDongyingShandong 257000China

The Triassic granitoids in Central Tianshan play a key role in determining the petrogenesis and tectonic evolution on the southern margin of the Central Asian orogenic *** this study,we present SHRIMP zircon U-Pb ages,Hf isotopic and geochemical data on the Xingxingxia biotite granite,amazonite granite and granitic pegmatite in Central Tianshan,NW *** U-Pb dating yielded formation ages of 242 Ma for the biotite granite and 240 Ma for the amazonite *** granitoid rocks have high K_(2)O with low MgO and CaO *** are enriched in Nb,Ta,Hf and Y,while being depleted in Ba and Sr,showing flat HREE patterns and negative Eu *** have typical A-type granite geochemical signatures with high Ga/A_(1)(8–13)and TFeO/(TFeO+MgO)ratios,showing an A_(2) affinity for biotite granite and an A_(1) affinity for amazonite granite and granitic *** ε_(Hf)(t)values of the granitoids are 0.45–2.66,with Hf model ages of 0.99–1.17 *** suggests that these A-type granites originated from partial melting of the lower *** propose that Xingxingxia Triassic A-type granites formed under lithospheric extension from post-orogenic to anorogenic intraplate settings and NE-trending regional strike-slip fault-controlled magma emplacement in the upper crust.

关键词： Triassic A-type granite Xingxingxia Central Tianshan Central Asian orogenic belt

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Microstructure Features and the Macroscopic Acoustic Behavior of Gassy Silt in the Yellow River Delta

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Journal of Ocean University of China 2024年第2期23卷 371-382页

作者： LIU Tao GUO Zhenqi ZHANG Yan WU Chen LIU Lele DENG Shenggui Laboratory for Marine geology Pilot National Laboratory for Marine Science and TechnologyQingdao 266061China shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China College of Civil Engineering Anhui Jianzhu UniversityHefei 230601China The Key Laboratory of Gas Hydrate Ministry of Natural ResourcesQingdao Institute of Marine GeologyQingdao 266071China College of Marine Geosciences Key Laboratory of Submarine Geosciences and ProspectingOcean University of ChinaQingdao 266100China

The morphological changes in isolated bubbles in gassy silt play a critical role in the microscopic structures between soil particles and bubbles and macroscopic physical *** on X-ray CT scanning experiments under various vertical loads(four levels),self-designed acoustic macro experiments,and a series of formula revisions to the macro-air-bearing silt sound-velocity prediction model,this paper discusses the macro-and micro-scale features of gassy silts from the Yellow River *** samples consisted of different proportions of silt from the Yellow River Delta and porous media,and they were used to form two types of aerosol silts with initial gas contents of 4.23%and 7.67%.The results show that the air bubble content and external load considerably affect the microstructural parameters and acoustic behavior of gassy silt in the Yellow River *** macroscopic sound velocity showed a linear positive correlation with vertical load and relation to microstructural parameters in varying manners and *** on the traditional Biot-Stoll acoustic model,the gas-phase medium coefficient was introduced for the proper calculation and prediction of the sound velocity of air-bearing *** errors of the overall prediction varied between 5.6%and 9.6%.

关键词： gassy silt vertical load microstructure parameters bubble vibration Biot-Stoll acoustic model

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Evolution of Diagenetic Fluid of the Dawsonite-Bearing Sandstone in the Jiyang Depression,Eastern China

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Journal of Ocean University of China 2024年第1期23卷 80-98页

作者： LI Fulai MA Wenkuan ZHANG Chun WANG Kaining National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China shandong Geological Exploration Institute of China Chemical geology and Mine bureau Jinan 250013China

Based on the petrology,isotope geochemistry and fluid inclusions analysis,we established the evolutionary mode of the diagenetic fluid of dawsonite-bearing sandstone in the Jiyang ***-bearing sandstone is characterized by double injection of CO_(2)and oil-gas in the Jiyang Depression that have experienced a relatively complex diagenetic fluid evolution *** diagenetic sequence of secondary minerals involves secondary enlargement of quartz,kaolinite,first-stage calcite,dawsonite,second-stage calcite,ferrocalcite,dolomite and *** charging in the dawsonite-bearing sandstone occurred at around 2.6–0 *** CO_(2)charging event occurred during Dongying tectonism,forming the Pingfangwang CO_(2)gas reservoir,which provided an abundant carbon source for dawsonite *** and oxygen isotopic compositions of dawsonite demonstrate that CO_(2)forming the dawsonite was of an inorganic origin derived from the mantle,and that water mediating the proc-ess during dawsonite precipitation was sequestered brine with a fluid temperature of 82℃.The evolutionary sequence of the diagenetic fluid in the dawsonite-bearing sandstone was:alkaline syngenetic fluids,weak alkaline fluids during organic acid forma-tion,acidic fluids in the early stage of CO_(2)injection,alkaline fluids in the late stage of CO_(2)injection,and weak alkaline fluids during oil and gas *** mode indicates an increase in-HCO_(3)because of the CO_(2)injection,and the loss of Ca^(2+)and Mg^(2+)due to the precipitation of carbonate ***,the evolutionary mode of diagenetic fluids is in good agreement with high HCO_(3)^(-),low Ca^(2+)and low Mg^(2+)composition of the present formation water in the dawsonite-bearing sandstone.

关键词： evolution of diagenetic fluid dawsonite CO_(2)injection and hydrocarbon charging mineral diagenetic sequence iso-topic geochemistry fluid inclusions

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