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Seismic Sedimentology Interpretation Method of Meandering Fluvial Reservoir:From Model to Real Data

Journal of Earth Science 2015年第4期26卷 598-606页

作者： Tao zhang xianguo zhang Chengyan Lin Jingfeng Yu Shouxiu zhang College of Earth Science and Engineering Shandong University of Science and Technology School of Geosciences China University of Petroleum Exploration and Development Research Institute Xinjiang Oilfield Company Dongxin Oil Production Plant Shengli Oilfield Company

Reservoir architecture of meandering river deposition is complex and traditional seismic facies interpretation method cannot characterize it when layer thickness is under seismic vertical reso- lution. In this study, a seismic sedimentology interpretation method and workflow for point bar char- acterization is built. Firstly, the influences of seismic frequency and sandstone thickness on seismic re- flection are analyzed by outcrop detection with ground penetrating radar （GPR） and seismic forward modeling. It is found that （1） sandstone thickness can influence seismic reflection of point bar architecture. With the increasing of sandstone thickness from 1/4 wavelength （λ） to λ/2, seismic reflection geometries various from ambiguous reflection, ＂V＂ type reflection to ＂X＂ type reflection; （2） seismic frequency can influence reservoirs＇ seismic reflection geometry. Seismic events follow inclined lateral aggradation surfaces, which is isochronic depositional boundaries, in high frequency seismic data while the events extend along lithologic surfaces, which are level, in low frequency data. Secondly, strata slice interpretation method for thin layer depositional characterization is discussed with seismic forward modeling. Lastly, a method and workflow based on the above study is built which includes seismic frequency analysis, 90° phasing, stratal slicing and integrated interpretation of slice and seismic profile. This method is used in real data study in Tiger shoal, the Gulf of Mexico. Two episodes of meandering fluvial deposition is recognized in the study layer. Sandstone of the lower unit, which is formed in low base level stage, distributes limited. Sandstone distribution dimension and channel sinuosity become larger in the upper layer, which is high base level deposition.

关键词： point bar reservoir architecture seismic sedimentology stratal slice.

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Roles of initial current carrier in the distribution of field-aligned current in 3-D Hall MHD simulations

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Science China(Technological Sciences) 2008年第3期51卷 323-336页

作者： zhang xianguo PU ZuYin MA ZhiWei ZHOU XuZhi Institute of Space Physics and Applied Technology School of Earth and Space SciencePeking UniversityBeijing 100871China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Institute of Fusion Theory and Simulation School of ScienceZhejiang UniversityHangzhou 310027China

A three-dimensional (3-D) Hall MHD simulation is carried out to study the roles of initial current carrier in the topology of magnetic field, the generation and distribu- tion of field aligned currents (FACs), and the appearance of Alfvén waves. Consid- ering the contribution of ions to the initial current, the topology of the obtained magnetic field turns to be more complex. In some cases, it is found that not only the traditional By quadrupole structure but also a reversal By quadrupole structure appears in the simulation box. This can explain the observational features near the diffusion region, which are inconsistent with the Hall MHD theory with the total ini- tial current carried by electrons. Several other interesting features are also emerged. First, motions of electrons and ions are decoupled from each other in the small plasma region (Hall effect region) with a scale less than or comparable with the ion inertial length or ion skin depth di=c/ωp. In the non-Hall effect region, the global magnetic structure is shifted in +y direction under the influence of ions with initial y directional motion. However, in the Hall effect region, magnetic field lines are bent in ?y direction, mainly controlled by the motion of electrons, then By is generated. Second, FACs emerge as a result of the appearance of By. Compared with the prior Hall MHD simulation results, the generated FACs shift in +y direction, and hence the dawn-dusk symmetry is broken. Third, the Walén relation in our simulations is consistent with the Walén relation in Hall plasma, thus the presence of Alfvén wave is confirmed.

关键词： collisionless magnetic reconnection Hall MHD simulation field aligned current (FAC) Alfvén wave Hall effects

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Emission of greenhouse gases from sewer networks:field assessment and isotopic characterization

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Frontiers of Environmental Science & Engineering 2024年第10期18卷 1-13页

作者： Xin Yuan xianguo zhang Yuqi Yang Xuan Li Xin Xing Jiane Zuo State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Capital Eco-Pro Group Beijing 100444China Tsinghua Shenzhen International Graduate School Shenzhen 518055China

Sewer networks play a vital role in sewage collection and transportation,and they are being rapidly ***,the microbial processes occurring within these networks have emerged as significant contributors to greenhouse gas(GHG)*** to that from other sectors,our understanding of the magnitude of GHG emissions from sewer networks is currently *** this study,we conducted a GHG emission assessment in an independent sewer network located in Beijing,*** findings revealed annual emissions of 62.3 kg CH_(4) and 0.753 kg ***_(4) emerged as the primary GHG emitted from sewers,accounting for 87.4%of the total GHG ***,compared with main pipes,branch pipes were responsible for a larger share of GHG emissions,contributing to 76.7%of the total.A GHG emission factor of 0.26 kg CO_(2)-eq/(m:yr)was established to quantify sewer GHG *** examining the isotopic signatures of CO_(2)/CH_(4) pairs,it was determined that CH_(4) production in sewers primarily occurred through acetate ***,the structure of sewer pipes had a significant impact on GHG *** study offers valuable insights into the overall GHG emissions associated with sewer networks and sheds ight on themechanismsdriving theseemissions.

关键词： Sewer network Greenhousegases Stablecarbon isotopes Methane Nitrous oxide

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3D geocellular modeling for reservoir characterization of lacustrine turbidite reservoirs:Submember 3 of the third member of the Eocene Shahejie Formation,Dongying depression,Eastern China

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Petroleum Research 2022年第1期7卷 47-61页

作者： Marco Shaban Lutome Chengyan Lin Dong Chunmei xianguo zhang Januarius Matata Bishanga School of Geosciences China University of Petroleum(East China)Qingdao266580China College of Earth Sciences and Engineering University of DodomaDodomaTanzania

3D geocellular modeling is increasingly essential in the petroleum industry;it brings together all petroleum disciplines,and it is commonly used in simulation and production ***,modeling slope and deep-water turbidite reservoirs using conventional modeling methods pose a significant challenge due to the structural complexity and thin-beds associated with these *** the innovative modeling technology of PaleoScan,the reservoirs in Sub member 3 of the third member of the Shahejie Formation are modeled to understand the structural *** resulting model is populated with petrophysical properties i.e.,porosity and permeability to predict their lateral and vertical distribution within these sandstone *** study suggests that the reservoir in the highstand system tract(HST)is characterized by the clinoforms configuration *** reservoir is highly faulted mainly in the northern and southeastern parts of the *** sedimentary layers are deposited across the slope and downlapping,thinning,and terminating toward to the *** two isochore surface maps reveal sediment thickness variation and depositional trends within each individual depositional *** zones or areas that corresponds to low values on the thickness maps suggest minor uplifts associated with intensive faulting in the Eocene *** topographical highs played a fundamental role in distributing the sediments delivered to the basin from distant *** maps reveal that sediments that filled the basin appear to come from different source points,primarily delivered from the north,southeast,and northeast of the basin with varying depositional *** modeled porosity and permeability indicate that the delta fed turbidite reservoirs are characterized by medium to high porosity values of 10e20%and low to medium permeability values of 30-410mD,*** porosity values increase to the southeast and toward the basinwards(west)while perme

关键词： Geomodelling Geocellular modelling Dongying depression Property modelling Reservoir characterization Lacustrine turbidites

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Study of the Seepage Mechanism in Thick Heterogeneous Gas Reservoirs

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Fluid Dynamics & Materials Processing 2023年第6期19卷 1679-1691页

作者： Xin Huang Yunpeng Jiang Daowu Huang Xianke He xianguo zhang Ping Guo Shanghai Branch of CNOOC Ltd.Shanghai200335China School of Geosciences China University of PetroleumQingdao266580China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu610500China

The seepage mechanism plays a crucial role in low-permeability gas *** with conventional gas reservoirs,low-permeability sandstone gas reservoirs are characterized by low porosity,low permeability,strong heterogeneity,and high water ***,their percolation mechanisms are more *** present work describes a series of experiments conducted considering low-permeability sandstone cores under pressuredepletion conditions(from the Xihu Depression in the East China Sea Basin).It is shown that the threshold pressure gradient of a low-permeability gas reservoir in thick layers is positively correlated with water saturation and negatively correlated with permeability and *** reservoir stress sensitivity is related to permeability and rock *** sensitivity is generally low when permeability is high or in the early stage of gas reservoir *** is also shown that in sand conglomerates,especially the more sparsely filled parts,the interstitial materials among the conglomerates can be rapidly dislodged from the skeleton particles under *** material can therefore disperse,migrate,and block the pore throat producing serious,stress-sensitive damage.

关键词： Seepage mechanism low-permeability gas reservoir threshold pressure gradient stress sensitivity control factors

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Ultralow frequency wave characteristics extracted from particle data:Application of IGSO observations

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Science China(Technological Sciences) 2017年第3期60卷 419-424页

作者： LI Li ZHOU XuZhi ZONG QiuGang CHEN XingRan ZOU Hong REN Jie HAO YiXin zhang xianguo Institute of Space Physics and Applied Technology Peking University College of Astronautics Nanjing University of Aeronautics and Astronautics State Key Laboratory of Space Weather National Space Science CenterChinese Academy of Sciences

3 Summary and discussion In the generalized drift resonance theory[17],a characteristic signature of the ULF wave-particle interactions is the increasingly-tilted stripes in the particle energy *** phase difference ac... 详细信息

关键词： ultralow frequency waves wave-particle interactions drift resonance ULF wave characteristics

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Key Questions of Solar Wind-Moon Interaction

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Space(Science & Technology) 2023年第1期3卷 402-415页

作者： Hui zhang Jinbin Cao Yangting Lin Yong Wei Lei Li xianguo zhang Honglei Lin Lianghai Xie Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China School of Space and Environment Beihang UniversityBeijing 100191China Beijing Key Laboratory of Space Environment Exploration National Space Science CenterChinese Academy of SciencesBeijingChina

Key questions on solar wind-Moon interaction are *** the nearest celestial body to Earth,Moon’s space environment is distinctive to Earth’s mainly because of lack of a significant atmosphere/ionosphere and a global magnetic *** a global respective,solar wind can bombard its surface,and the solar wind materials cumulated in the soil record the evolution of the Solar *** small-scale remanent magnetic fields are scattered over the lunar surface and,just as planetary magnetic fields protect planets,they are believed to divert the incident solar wind and shield the local lunar surface beneath,thus producing unique local surface environment that is critical to activities of human beings/facilities,thus providing unique landing sites to explore the origins of lunar swirls and remanent magnetic *** have hinted that this local interaction,however,may be also distinct with the interacting scenario on planets,and the specific process has not been revealed because of lack of in situ observations in the near-Moon space or on the *** global and local solar wind interactions of the Moon represent 2 types of characteristic interaction of celestial bodies with stellar wind in deep space,i.e.,the interactions of nonmagnetized bodies and of small-scale magnetized bodies,both of which may occur on asteroids and *** deep-space celestial bodies,either difficult or impossible to reach for human beings or artificial satellites,are hard to measure,and the exploration of the Moon can reveal the mystery of stellar wind interaction on these bodies.

关键词： Solar stellar Wind

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Thermosphere joint observations by TM-1 constellations and Swarm-B during the April 2023 geomagnetic storm

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Earth and Planetary Physics 2024年第2期8卷 307-316页

作者： YongPing Li YueQiang Sun xianguo zhang JiangZhao Ai XiaoLiang Zheng Jia Li YuJie Wang BiBo Guo Feng Yan ShiLong Wei XinChun Tang YuanYuan Cao National Space Science Center Chinese Academy of SciencesBeijing 100190China Beijing Key Laboratory of Space Environment Exploration Beijing 100190China Key Laboratory of Science and Technology on Space Environment Situational Awareness Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Shenzhen Aerospace Dongfanghong Satellite LtdShenzhen 518057China

The response of thermosphere density to geomagnetic storms is a complicated physical ***-satellite joint observations at the same altitude but different local times(LTs)are important for understanding this process;however,until now such studies have hardly been *** this report,we analyze in detail the thermosphere mass density response at 510 km during the April 23−24,2023 geomagnetic storm using data derived from the TM-1(TianMu-1)satellite constellation and Swarm-B *** observations show that there were significant LT differences in the hemispheric asymmetry of the thermosphere mass density during the geomagnetic *** observed by satellite TM02 at nearly 11.3 and 23.3 LTs were larger in the northern hemisphere than in the *** TM04 dayside density observations appear to be almost symmetrical with respect to the equator,though southern hemisphere densities on the nightside were ***-B data exhibit near-symmetry between the *** addition,the mass density ratio results show that TM04 nightside observations,TM02 data,and Swarm-B data all clearly show stronger effects in the southern hemisphere,except for TM04 on the dayside,which suggest hemispheric *** South-North density enhancement differences in TM02 and TM04 on dayside can reach 130%,and Swarm-B data even achieve 180%*** the observations of all three satellites,large-scale traveling atmospheric disturbances(TADs)first appear at high latitudes and propagate to low latitudes,thereby disturbing the atmosphere above the equator and even into the opposite ***00 model simulations were also performed on this geomagnetic *** are absent in the NRLMSISE00 *** satellite data suggest that NRLMSISE00 significantly underestimates the magnitude of the density response of the thermosphere during geomagnetic storms,especially at high latitudes in both ***,use of the density simulation of NRLM

关键词： TM-1 constellation Swarm-B joint observations geomagnetic storm Local Times

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Space Environment Measurements and Applications on the Tianhe Core Module of China Space Station

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空间科学学报 2022年第4期42卷 744-753页

作者： LIU Siqing SUN Yueqiang ZHONG Qiuzhen WEI Fei LIN Ruilin LI Zhitao REN Tingling LI Yongping zhang xianguo zhang Shenyi LUO Bingxian CHANG Zhen WANG Chunqin PENG Songwu AI Jiangzhao State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190 Key Laboratory of Science and Technology on Environmental Space Situation Awareness Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

Tianhe Core Module of China Space Station(CSS)equips a set of instruments consisting of a Particle Fluxes and Solar Activity Detector(PFSAD)and two Atmospheric Density Multi-directional Detectors(ADMDs).The PFSAD is to measure X-rays from the Sun and energetic particles in the low-latitude and low altitude regions,including electrons,protons,and helium *** ADMDs are to measure thermospheric atmospheric *** instruments provide real-time data of the orbital space environment,including solar flares,energetic particle variation and thermospheric density *** the data contribute to the CSS space weather service for mission control and astronaut’s *** paper gives preliminary analyses of the space environment measurements from the PFSAD and the *** further analysis,the 1024-channel fine spectra of the solar X-ray can be used to study the mechanism of solar flares and their impacts on the Earth’s *** accumulation will be helpful for analyzing mid-term and long-term variations of the South Atlantic Anomaly and atmosphere ***,the data are useful to calibrate previous empirical models and establish new models to study the space environment.

关键词： Space environment Tianhe core module China Space Station(CSS)

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Return to the Moon:New perspectives on lunar exploration

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Science Bulletin 2024年第13期69卷 2136-2148页

作者： Yangting Lin Wei Yang Hui zhang Hejiu Hui Sen Hu Long Xiao Jianzhong Liu Zhiyong Xiao Zongyu Yue Jinhai zhang Yang Liu Jing Yang Honglei Lin Aicheng zhang Dijun Guo Sheng Gou Lin Xu Yuyang He xianguo zhang Liping Qin Zongcheng Ling Xiongyao Li Aimin Du Huaiyu He Peng zhang Jinbin Cao Xianhua Li Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory for Mineral Deposits Research and School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China Institute of Geochemistry Chinese Academy of SciencesGuiyang 550002China Planetary Environmental and Astrobiological Research Laboratory School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519082China National Space Science Center Chinese Academy of SciencesBeijing 100190China Deep Space Exploration Laboratory/CAS Key Laboratory of Crust-Mantle Materials and Environments University of Science and Technology of ChinaHefei 230026China Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China Technology and Engineering Center for Space Utilization Chinese Academy of SciencesBeijing 100094China School of Space and Environment Beihang UniversityBeijing 100191China

Lunar exploration is deemed crucial for uncovering the origins of the Earth-Moon system and is the first step for advancing humanity’s exploration of deep *** the past decade,the Chinese Lunar Exploration Program(CLEP),also known as the Chang’e(CE)Project,has achieved remarkable *** has successfully developed and demonstrated the engineering capability required to reach and return from the lunar ***,the CE Project has made historic firsts with the landing and on-site exploration of the far side of the Moon,along with the collection of the youngest volcanic samples from the Procellarum KREEP *** achievements have significantly enhanced our understanding of lunar *** on this success,China has proposed an ambitious crewed lunar exploration strategy,aiming to return to the Moon for scientific exploration and *** plan encompasses two primary phases:the first crewed lunar landing and exploration,followed by a thousand-kilometer scale scientific expedition to construct a geological cross-section across the lunar *** the limitations of current lunar exploration efforts and China’s engineering and technical capabilities,this paper explores the benefits of crewed lunar exploration while leveraging synergies with robotic *** study refines fundamental lunar scientific questions that could lead to significant breakthroughs,considering the respective engineering and technological *** research lays a crucial foundation for defining the objectives of future lunar exploration,emphasizing the importance of crewed missions and offering insights into potential advancements in lunar science.

关键词： Crewed lunar exploration Water and volatiles Composition and structure of lunar interior Volcanic activity and evolution of lunar mantle Space weathering and radiation environments Exploration technology

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