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Recent techniques on analyses and characterizations of shale gas and oil reservoir

Energy Reviews 2024年第2期3卷 31-62页

作者： Yamin Wang Zhenlin Wang Zhengchen zhang Shanshan Yao Hong zhang Guoqing Zheng Feifei Luo Lele Feng Kouqi Liu Liangliang Jiang institute of Energy Peking UniversityBeijing100871China Petro China Xinjiang Oilfield Company Karamay834000China School of Mining and Petroleum Engineering University of AlbertaEdmontonAlbertaCanada College of Construction Engineering Jilin UniversityChangchun130061China School of Safety Engineering China University of Mining and TechnologyXuzhouChina Department of Chemical and Petroleum Engineering University of CalgaryCalgaryAlbertaCanada

This article offers a comprehensive review focused on the analysis and characterization of shale reservoirs,unconventional hydrocarbon resources that uniquely serve as both the source reservoir for gas and oil,and the *** analyze and characterize shale reservoirs,pore structure,rock components and rock mechanical properties are three main factors to *** three main factors are necessary for successful field operations in shale *** now,there are various techniques utilized to characterize these three ***,this study delves into the intricacies of shale reservoir's pore structure,rock components and mechanical properties under varying geological conditions,summarizing various techniques utilized to characterize these properties in previous *** study also discusses the role of analytical techniques in understanding the complex interactions between kerogen and the surrounding mineral *** providing a summary of various techniques operated on the mentioned three main factors,this paper supplies the effective and optimal technique on analyzing different properties of shale ***,the paper aims to contribute to more effective resource assessment and production optimization in shale reservoirs,offering insights that have significant implications for the future of unconventional hydrocarbon extraction.

关键词： Shale reservoir Pore structure Rock components Mechanical test Kerogen

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geological and geochemical characteristics and ore genesis of the Keketale VMS Pb-Zn deposit,Southern Altai Metallogenic Belt,NW China

Geological and geochemical characteristics and ore genesis o...

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中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： Bo Wan~(a,b,*),Lianchang zhang~a,Wenjiao Xiao~b a Key Laboratory of mineral Resources,institute of Geology and Geophysics,chinese academy of sciences,P.O.Box 9825,beijing 100029,P.R.China b State Key Laboratory of Lithospheric Evolution,institute of Geology and Geophysics,chinese academy of sciences,P.O.Box 9825,beijing 100029,P.R.China

The Keketale Pb-Zn volcanogenic massive sulfide(VMS)deposit occurs in the early Devonian sequence of the Kangbutiebao Formation of the Southern Altai Metallogenic Belt(SAMB),northern Xinjiang,*** the orebodies are stratabound and hosted by a suite of meta-sedimentary rocks intercalated with volcanic *** sulfide ores are pyrite,sphalerite,galena,with minor pyrrhotite and rare ***, banded,and disseminated ores are the three main types.A typical VMS-type hydrothermal alteration zone is developed around the *** of the overturned strata,an intense chlorite-,pyrite-rich crosscutting feeder zone is present immediately above the orebody.A sericite zone envelopes the chlorite *** meta-volcanic rocks show decoupled characteristics between the high field strength elements(Ta, Zr,and Hf)and large ion lithophile elements(Rb,Ba,and Th);all samples plot in the volcanic arc field in Ta *** discrimination ***δS values of the stockwork zone are-1.0 to 4.5‰,and those of banded or massive ores range from-11.1 to-8.8‰,indicating that hydrothermal fluids may have had multiple sources and that bacterial sulfate reduction probably played an important ***(Sr/Sr) ratios andε(t)values of sulfide ores range from 0.70351 to 0.70951 and-3.6 to +3.0,respectively,whereas the corresponding values for wall rocks are 0.70560 to 0.70967 and-3.6 to + *** a Sr-Nd isotopic correlation diagram,all the ores,meta-sedimentary rocks and volcanic rocks plot close to one another,clearly indicating a mixed mantle-crust *** isotopic compositions of the ores are 17.995 to 18.232 for Pb/Pb, 15.498 to 15.669 for Pb/Pb and 37.725 to 38.296 for Pb/Pb,withμ(U/Pb)ranging from 9.3 to *** Pb isotopes show a wide range in a Pb-Pb diagram,and the high Pb/Pb values in the ores show distinctive crustal contamination signatures;a mixed mantle-crustal source is thus *** element geochemistry data are consistent with the Sr-Nd and Pb is

关键词： chinese Altai VMS deposit Keketale Pb-Zn deposit Back-arc basin

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熊耳山矿集区蒿坪沟Ag-Au多金属矿床绿泥石特征及其找矿意义

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地质力学学报 2024年第1期30卷 129-146页

作者：刘松岩张达杨明建张鑫明未国栋聂胜强王轩冯彦平栗文杰陈贵兰中国地质大学(北京) 北京100083 中国地质科学院矿产资源研究所北京100037 北京大学地球与空间科学学院北京100871 河南发恩德金属矿产有限公司河南洛阳471700

为理清蒿坪沟Ag-Au多金属矿床中多阶段矿化与热液蚀变之间的关系,文章选取与铅锌成矿阶段密切相关的绿泥石进行野外观察及电子探针分析。文章将蒿坪沟Ag-Au多金属矿床中的绿泥石分为3类:Ⅰ型分布在石英脉两侧的围岩中;Ⅱ型呈细粒、隐晶... 详细信息

为理清蒿坪沟Ag-Au多金属矿床中多阶段矿化与热液蚀变之间的关系,文章选取与铅锌成矿阶段密切相关的绿泥石进行野外观察及电子探针分析。文章将蒿坪沟Ag-Au多金属矿床中的绿泥石分为3类:Ⅰ型分布在石英脉两侧的围岩中;Ⅱ型呈细粒、隐晶质填充于隐爆角砾岩基质;Ⅲ型与铅锌硫化物共生、或以蠕虫状广泛分布在石英颗粒间隙中。3种类型绿泥石均为斜绿泥石,并落在了铁镁绿泥石的范围内,指示其形成于偏还原的酸性环境中;在阳离子置换中,主要发生了Fe2+对Mg2+的置换,其余置换作用均不明显;3种绿泥石形成与镁铁质围岩关系密切。由校正后的绿泥石地质温度计估算出3种类型绿泥石的形成温度为196~239℃,属于中—低温热液蚀变范围。3类绿泥石与蒿坪沟Ag-Au多金属矿床银铅锌成矿阶段相匹配,对进一步找矿勘查具有重要意义。绿泥石化学特征表明岩浆热液参与了成矿流体的形成,绿泥石形成于熊耳山矿集区早白垩世大规模岩浆−成矿时期。

关键词：多金属矿床找矿绿泥石电子探针成矿地球化学熊耳山

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New geology, petrography and SHRIMP zircon U-Pb isotopic geochronology of the metabasites along the Changjiang-Qionghai fault zone in Hainan Island, South China: implications for the Paleozoic tectonic event

New geology, petrography and SHRIMP zircon U-Pb isotopic geo...

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International Conference on Continental Volcanism

作者： Xu Deru Xia Bin Li Pengchun Chen Guanghao zhang Yuquan Ma Ci Key Lab of Marginal Sea Geology Guangzhou institute of Geochemistry chinese academy of sciences Guangzhou 510640 China Graduate College of chinese academy of sciences beijing 100049 China

＜正＞New geological and petrographical investigation, and SHRIMP zircon U-Pb dating assisted by Cathodoluminescence （CL） images all prove that the metabasites along the Changjiang-Qionghai fault zone in Hainan Island, South China were not the same products due to the same tectonic setting. The Chunxin metabasites in Tunchang area, southeast Hainan Island have a protolith age most likely （?） 514 Ma, followed subsequently by a ～440-

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Characterization and spatial analysis of coseismic landslides triggered by the Luding Ms 6.8 earthquake in the Xianshuihe fault zone, Southwest China

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Journal of Mountain Science 2024年第1期21卷 160-181页

作者： GUO Changbao LI Caihong YANG Zhihua NI Jiawei ZHONG Ning WANG Meng YAN Yiqiu SONG Deguang zhang Yanan zhang Xianbing WU Ruian CAO Shichao SHAO Weiwei institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Active Tectonics and geological Safety Ministry of Natural ResourcesBeijing 100081China Research Center of Neotectonism and Crustal Stability China Geological SurveyBeijing 100081China School of Earth sciences and Resources China University of GeosciencesBeijing 100083China Sichuan institute of geological Survey Chengdu 610081China

On September 5, 2022, a magnitude Ms 6.8 earthquake occurred along the Moxi fault in the southern part of the Xianshuihe fault zone located in the southeastern margin of the Tibetan Plateau,resulting in severe damage and substantial economic loss. In this study, we established a coseismic landslide database triggered by Luding Ms 6.8 earthquake, which includes 4794 landslides with a total area of 46.79 km^(2). The coseismic landslides primarily consisted of medium and small-sized landslides, characterized by shallow surface sliding. Some exhibited characteristics of high-position initiation resulted in the obstruction or partial obstruction of rivers, leading to the formation of dammed lakes. Our research found that the coseismic landslides were predominantly observed on slopes ranging from 30° to 50°, occurring at between 1000 m and 2500 m, with slope aspects varying from 90° to 180°. Landslides were also highly developed in granitic bodies that had experienced structural fracturing and strong-tomoderate weathering. Coseismic landslides concentrated within a 6 km range on both sides of the Xianshuihe and Daduhe fault zones. The area and number of coseismic landslides exhibited a negative correlation with the distance to fault lines, road networks, and river systems, as they were influenced by fault activity, road excavation, and river erosion. The coseismic landslides were mainly distributed in the southeastern region of the epicenter, exhibiting relatively concentrated patterns within the IX-degree zones such as Moxi Town, Wandong River basin, Detuo Town to Wanggangping Township. Our research findings provide important data on the coseismic landslides triggered by the Luding Ms 6.8 earthquake and reveal the spatial distribution patterns of these landslides. These findings can serve as important references for risk mitigation, reconstruction planning, and regional earthquake disaster research in the earthquake-affected area.

关键词： Luding earthquake Coseismic landslides Remote sensing interpretation Spatial distribution Xianshuihe fault Earthquake fault

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Experimental investigation into the salinity effect on the physicomechanical properties of carbonate saline soil

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1883-1895页

作者： Jiejie Shen Qing Wang Yating Chen Xuefei zhang Yan Han Yaowu Liu College of Construction Engineering Jilin UniversityChangchun130026China Shandong Zhengyuan geological Resources Exploration Co.Ltd. Jinan250013China China Renewable Energy Engineering institute Beijing100120China

For engineering structures with saline soil as a filling material,such as channel slope,road subgrade,etc.,the rich soluble salt in the soil is an important potential factor affecting their safety *** study examines the Atterberg limits,shear strength,and compressibility of carbonate saline soil samples with different NaHCO3 contents in Northeast *** mechanism underlying the influence of salt content on soil macroscopic properties was investigated based on a volumetric flask test,a mercury intrusion porosimetry(MIP)test,and a scanning electron microscopic(SEM)*** results demonstrated that when NaHCO3 contents were lower than the threshold value of 1.5%,the bound water film adsorbed on the surface of clay particles thickened continuously,and correspondingly,the Atterberg limits and plasticity index increased rapidly as the increase of sodium ion ***,the bonding force between particles was weakened,the dispersion of large aggregates was enhanced,and the soil structure became ***,the compressibility increased and the shear strength(mainly cohesion)decreased by 28.64%.However,when the NaHCO3 content exceeded the threshold value of 1.5%,the salt gradually approached solubility and filled the pores between particles in the form of crystals,resulting in a decrease in soil *** cementation effect generated by salt crystals increased the bonding force between soil particles,leading to a decrease in plasticity index and an improvement in soil mechanical ***,this work provides valuable suggestions and theoretical guidance for the scientific utilization of carbonate saline soil in backfill engineering projects.

关键词： Carbonate saline soil Salt content Physicomechanical properties Bound water Microstructure

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Intrinsic and scattering attenuations of the Sichuan-Yunnan region in China from S coda waves

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Earthquake Science 2024年第1期37卷 51-66页

作者： Tian Li Lei zhang Xiaodong Song Qincai Wang Xinyu Jiang Jinchuan zhang Hanlin Chen SinoProbe Laboratory School of Earth and Space SciencesPeking UniversityBeijing 100871China Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards Peking UniversityBeijing 100871China institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China Earthquake Agency of Jiangsu Province Nanjing 210014China

Seismic attenuation is a fundamental property of the Earth's *** structure for the complicated geological structures with strong seismicity in the Sichuan-Yunnan region is poorly *** this study,we collected 108,399 waveforms of 11,517 local small earthquakes with magnitudes between 1.5 and 3.5 from January 2014 to September 2021 in the Sichuan-Yunnan region and its adjacent *** employed an envelope inversion technique for separating the intrinsic and scattering attenuations of the S coda wave,and obtained the intrinsic and scattering attenuation structures for frequencies between 0.25 and 8.00 *** attenuation structures correlate well with the geological units,and some major faults mark the attenuation variations where historic large earthquakes have *** regional average attenuation shows a negative frequency *** average scattering attenuation has a faster descending rate than the average intrinsic attenuation,and is dominant at low frequencies,while at high frequencies the average intrinsic attenuation is *** lateral variation in the intrinsic attenuation is consistent with the variation in heat flow,the scattering attenuation may be related to the scatter distribution and *** total attenuation is consistent with the previous studies in this region,and the separate intrinsic and scattering attenuation may be useful in understanding regional tectonics and important in earthquake prevention and disaster reduction.

关键词： Intrinsic attenuation scattering attenuation Sichuan-Yunnan region

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Intra-Oceanic Subduction Termination and Reinitiation of the Eastern Neo-Tethys in Myanmar

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Journal of Earth Science 2024年第3期35卷 1053-1058页

作者： Yi Chen Qinghua zhang Lin Chen Kaihui Shi Kyaing Sein State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of chinese academy of sciences Beijing 100049China Myanmar Geosciences Society Hlaing University CampusYangon 11062Myanmar

Subduction initiation and termination represent the birth and death of a subduction zone and are inevitable elements of terrestrial plate *** evidence demonstrates that subduction zone processes did not operate continuously and might involve multiple initiation and termination stages(Stern,2004),characterized by sustained subduction-zone death and *** geological and numerical studies focus on subduction initiation processes/mechanisms(see reviews in Yang,2022);however,subduction termination is often studied numerically at continental margins(Gerya,2022).How subduction termination proceeds in intra-oceanic settings remains enigmatic due to lacking geological records.

关键词： Eastern terrestrial continental

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Multistate transition and coupled solid-liquid modeling of motion process of long-runout landslide

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2694-2714页

作者： Yang Gao Yueping Yin Bin Li Han zhang Weile Wu Haoyuan Gao institute of Geomechanics Chinese Academy of Geological SciencesChina Geological SurveyBeijing100081China Key Laboratory of Active Tectonics and geological Safety Ministry of Natural ResourcesBeijing100081China China institute of geological Environment Monitoring China Geological SurveyBeijing100081China School of geological Engineering and Geomatics Chang’an UniversityXi’an710054China

The recognition,repetition and prediction of the post-failure motion process of long-runout landslides are key scientific problems in the prevention and mitigation of geological *** this study,a new numerical method involving LPF3D based on a multialgorithm and multiconstitutive model was proposed to simulate long-runout landslides with high precision and *** following results were obtained:(a)The motion process of landslides showed a steric effect with mobility,including gradual disintegration and *** sliding mass can be divided into three states(dense,dilute and ultradilute)in the motion process,which can be solved by three dynamic regimes(friction,collision,and inertial);(b)Coupling simulation between the solid grain and liquid phases was achieved,focusing on drag force influences;(c)Different algorithms and constitutive models were employed in phase-state *** volume fraction is an important indicator to distinguish different state types and solid‒liquid *** flume experimental results were favorably validated against long-runout landslide case data;and(d)In this method,matched dynamic numerical modeling was developed to better capture the realistic motion process of long-runout landslides,and the advantages of continuum media and discrete media were combined to improve the computational accuracy and *** new method can reflect the realistic physical and mechanical processes in long-runout landslide motion and provide a suitable method for risk assessment and pre-failure prediction.

关键词： Long-runout landslide Multistate transition Mixed solid‒liquid flow Post-failure process Numerical simulation

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Intramolecular carbon isotope of propane from coal-derived gas reservoirs of sedimentary basins:Implications for source,generation and post-generation of hydrocarbons

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Geoscience Frontiers 2024年第4期15卷 230-244页

作者： Xiaofeng Wang Peng Liu Wenhui Liu Changjie Liu Ying Lin Dongdong zhang State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China College of Safety Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Petroleum Exploration and Production Research InstituteSINOPECBeijing 100083China Northwest institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China Department of Earth and Planetary sciences University of CaliforniaRiversideRiversideCA 92521USA

An intramolecular isotopic study was conducted on natural gases collected from coal-derived gas reser-voirs in sedimentary basins of China to determine their position-specific isotope *** propane from the Turpan-Hami Basin exhibited negativeΔc-T(δ13Ccentral-δ13Cterminal)values ranging from-3.9‰to-0.3‰,with an average of-2.1‰.Propane from the Ordos Basin,Sichuan Basin,and Tarim Basin showed positiveΔC-T values,with averages of 1.3‰,5.4‰and 7.6‰,*** carbon isotope compositions reveal the precursors and the propane generation pathways in the petroliferous *** formed from the thermal cracking of TypeⅢkerogen has largerδ13Ccentral andδ13Cterminal values than propane from TypeⅠ/Ⅱ*** precursor for natural gases collected in this study is identified to be TypeⅢ*** our data to calculated results for thermal cracking of TypeⅢkerogen,we found that propane from the low-maturity gas reservoir in the Turpan Basin was generated via the i-propyl radical pathway,whereas propane from the Sulige tight gas reservoir in the Ordos Basin was formed via the n-propyl radical pathway.δ13Cterminal values covered a narrow range across basins,in contrast toδ*** terminal carbon position in propane is less impacted by microbial oxidation and more relevant to maturity levels and ***,δ13Cterminal has a good potential to infer the origin and maturity level of natural *** examining post-generation processes,we proposed an improved identification strategy for microbial oxidation of natural gases,based on the position-specific carbon isotope distributions of *** from the Liaohe Depression of the Bohai Bay Basin and the Sichuan Basin were detected of post-generation microbial ***,position-specific carbon isotope composition of propane provides new insights into the generation mechanism and post-generation processes of natural gas in the geological period at the atomic level.

关键词： Intramolecular isotope Position-specific isotope Kinetic isotope effects Microbial anaerobic oxidation

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