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Evolution of the Ordos Plateau and environmental effects

Science China Earth Sciences 2007年第z2期50卷 19-26页

作者： YUE LePing li JianXing ZHENG guozhang li ZhiPei State Key Laboratory of Continental Dynamics (Northwest University) Geology Department Northwest University Xi'an 710069 China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences(CAS)Xi'an 710075 China State Key Laboratory of Continental Dynamics(Northwest University) Geology Department Northwest University Xi'an 710069 China Xi'an Institute of Geology and Mineral Resources Xi'an 710054 China College of Urban and Environment Science Shanxi Normal University Linfen 041004 China Xi'an Institute of Geology and Mineral Resources Xi'an 710054 China

Based on the analysis of temporary-spatial distribution, geomorphic position, contact relationship with underlying strata and grain size of red clay, we studied the formation and environmental background of red clay. During late Miocene-Pliocene, the Ordos Block finished the transformation from the basin to the plateau, which had an obvious environmental effect on the topography, indicated by the formation of highland undergoing wind erosion and lowland receiving red clay deposits. The red clay materials were sourced from dusts carried by wind energy and covered on the initial topography. Unlike Quaternary loess dust covering the overall the Loess Plateau, red clay deposited on the highland would be transported to the lowlands by wind and fluvial process. As a result, there was no continuous "Red Clay Plateau" in the Ordos region and red clay was only preserved in former lowlands. However, red clay was discontinuously distributed through the Loess Plateau and to some extent modified the initial topography. The differential uplift in interior plateau is indicated by the uplift of northern Baiyushan, central Ziwuling and southern Weibeibeishan. The Weibeibeishan Depression formed earlier and became the sedimentary center of red clay resulting in the thicker red clay deposits in Chaona, lingtai and Xunyi. Since Quaternary the aridity in the northern plateau enhanced and accelerated loess accumulation caused the formation of the Loess Plateau. During the late Pleistocene the rapid uplift led to the enhancement of erosion. Especially after the cut-through of Sanme Lake by the Yellow River, the decline of base level caused the falling of ground water level and at the same time the increase of drainage density resulting in the enhancement of evaporation capacity, which enhanced the aridity tendency of aridity in the Loess Plateau region.

关键词： the Ordos Plateau, environmental effects, red clay-loess

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Stress Distribution in the Upper Shihezi Formation from 1D Mechanical Earth Model and 3D Heterogeneous Geomechanical Model,linxing Region,Eastern Ordos Basin,Central China

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Acta Geologica Sinica(English Edition) 2021年第3期95卷 976-987页

作者： JU Wei SHEN Jian QIN Yong WANG Geoff XU Ke li guozhang li Chao Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process Ministry of EducationChina University of Mining and TechnologyXuzhouJiangsu 221008China Shandong Provincial Key Laboratory of Depositional Mineralization&Sedimentary Mineral Shandong University of Science and TechnologyQingdaoShandong 266590China School of Resources and Geosciences China University of Mining and TechnologyXuzhouJiangsu 221116China School of Chemical Engineering The University of QueenslandBrisbane St Lucia 4072QueenslandAustralia PetroChina Tarim Oilfield Company KorlaXinjiang 841000China

The Upper Shihezi sedimentary rocks in the linxing region has been estimated with a significant volume of tight sandstone ***,lateral distribution of the present-day stress magnitude is poorly understood,which limits further gas ***,a one-dimensional mechanical earth model and a three-dimensional heterogeneous geomechanical model are built to address this *** results indicate that the strike-slip stress regime is dominant in the Upper Shihezi *** low stresses are mainly located around wells L-60,L-22,L-40,L-90,etc,and stress distributions exhibit the similarity in the Members H2 and *** differential stresses are relatively low in the Upper Shihezi Formation,suggesting that complex hydraulic fracture networks may be *** fractures in the Upper Shihezi Formation contribute little to the overall gas production in the linxing *** addition,the minimum principal stress gradient increases with Young's modulus,suggesting that the stiffer rocks commonly convey higher stress *** is a strong interplay between stress distribution and heterogeneity in rock ***,the relative error between the predicted and measured results is less than 10%,implying that the predicted stress distribution is reliable and can be used for subsequent analysis in the linxing region.

关键词： stress distribution numerical simulation tight sandstone gas Upper Shihezi Formation linxing region Ordos Basin

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In-situ stress distribution and coalbed methane reservoir permeability in the linxing area, eastern Ordos Basin, China

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Frontiers of Earth Science 2018年第3期12卷 545-554页

作者： Wei JU Jian SHEN Yong QIN Shangzhi MENG Chao li guozhang li Guang YANG Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process Ministry of Education China University of Mining and Technology Xuzhou 221008 China School of Resources and Geosciences China-University of Mining and Technology Xuzhou 221116 China China United Coalbed Methane Corporation Ltd. Beijing 100011 China

Understanding the distribution of in-situ stresses is extremely important in a wide range of fields such as oil and gas exploration and development, CO2 sequestration, borehole stability, and stress-related geohazards assessment. In the present study, the in-situ stress distribution in the linxing area of eastern Ordos Basin, China, was analyzed based on well tested parameters. The maximum horizontal principal stress （SHmax）, minimum horizontal principal stress （Shmin）, and vertical stress （Sv） were calculated, and they were linearly correlated with burial depth. In general, two types of in-situ stress fields were determined in the linxing area：（i） the in-situ stress state followed the relation Sv 〉 Snmax 〉 Shmin in shallow layers with burial depths of less than about 940 m, indicating a normal faulting stress regime; （ii） the Snmax magnitude increased conspicuously and was greater than the Sv magnitude in deep layers with depths more than about 940 m, and the in-situ stress state followed the relation Snmax 〉 Sv 〉 Shmin, demonstrating a strike-slip faulting stress regime. The horizontal differential stress （Snmax-Shmtn） increased with burial depth, indicating that wellbore instability may be a potentially significant problem when drilling deep vertical wells. The lateral stress coefficient ranged from 0.73 to 1.08 with an average of 0.93 in the linxing area. The coalbed methane （CBM） reservoir permeability was also analyzed. No obvious exponential relationship was found between coal permeability and effective in-situ stress magnitude. Coal permeability was relatively high under a larger effective in-situ stress magnitude. Multiple factors, including fracture development, contribute to the variation of CBM reservoir permeability in the linxing area of eastern Ordos Basin.

关键词： in-situ stress coalbed methane permeability lateral stress coefficient linxing area Ordos Basin

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A workfow to Predict the Present-day in-situ Stress Field in Tectonically Stable Regions

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Journal of Environmental & Earth Sciences 2019年第2期1卷 42-47页

作者： Wei Ju Ke Xu Jian Shen Chao li guozhang li Haoran Xu Shengyu Wang Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process Ministry of EducationChina University of Mining and TechnologyXuzhouJiangsu221008China School of Resources and Geosciences China University of Mining and TechnologyXuzhouJiangsu221116China PetroChina Tarim Oilfield Company KorlaXinjiang841000China

Knowledge of the present-day in-situ stress distribution is greatly import-ant for better understanding of conventional and unconventional hydro-carbon reservoirs in many aspects,e.g,reservoir management,wellbore stability asssment,*** tectonically stable regions,the present-day in-situ stress field in terms of stress distribution is 1argely controlled by lithological changes,which can be predicted through|a numerical simulation method incorporating specific mechanical properties of the subsurface *** this study,a workflow was presented to predict the present-day in-situ stress field based on the finite element method(FEM).Sequentially,it consists of:i)building a three-dimensional(3D)geometric framework,i)creating a 3D petrophysical parameter field,11)integrating the geometric framework with petrophysical parameters,iv)setting up a 3D heterogeneous geomechanical model,and finally,v)calculating the present-day in-situ stress distribution and calibrating the prediction with measured stress data,e.g.,results from the extended leak-off tests(XLOTs).The approach was sucessfully applied to the Block W in Ordos Basin of central *** results indicated that the workflow and models presented in this study could be used as an effective tool to provide insights into stress perturbations in subsurface reservoirs and geological references for subsequent analysis.

关键词： Present-day in-situ stress field Tectonically stable region Ordos Basin Workflow Geomechanical modeling

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Weapon Equipment Auxiliary Maintenance Platform based on Augmented Reality Technology

Weapon Equipment Auxiliary Maintenance Platform based on Aug...

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作者： De Zhang guozhang li Huaiguang Wang Junning Zhang Department of Vehicle and Electrical Engineering Army Engineering University Shijiazhuang Campus Missile Engineering Department Army Engineering University Shijiazhuang Campus

With the development of science and technology and the progress of society,many largescale equipment with extremely complex structure and high technology density is gradually equipped with our army,and such equipment has very high requirements for the technical level of personnel in the maintenance *** present,the traditional maintenance technology has the problems of poor security and low efficiency,and augmented reality technology,combined with computer vision,machine learning and other fields of knowledge,has become the mainstream method in auxiliary maintenance,which plays an important role in improving *** this paper,Augmented Reality System to Assistance Maintenance Platform（ARSAMP） is ***,the advantages and functions of augmented reality are ***,it gives the development situation of foreign *** the advantages and disadvantages of traditional maintenance and ARSAMP are compared and the advantages and disadvantages of the current maintenance platform are pointed ***,the effective solution to improve the maintenance effect is put forward and the future development direction of the platform is prospected.

关键词： Augmented reality Computer vision Machine learning Auxiliary maintenance

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价值网模式的解构模型与管理框架研究

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管理评论 2010年第4期22卷 114-121页

作者：盛革李国章广东肇庆学院经济与管理学院肇庆526061 华南农业大学学生工作部广州510631

文章基于价值链理论发展、供应链结构优化和管理模式创新,理论刻划了价值网模式的解构模型,描绘了称之为联盟体的价值网组织结构,分析了协同电子商务作为价值网模式的商务工具性作用,在对供应链成本管理框架拓展的基础上作出了价值网模... 详细信息

文章基于价值链理论发展、供应链结构优化和管理模式创新,理论刻划了价值网模式的解构模型,描绘了称之为联盟体的价值网组织结构,分析了协同电子商务作为价值网模式的商务工具性作用,在对供应链成本管理框架拓展的基础上作出了价值网模式的成本分析框架,探讨了价值网模式的会计信息系统组成结构。

关键词：价值网联盟体协同电子商务成本管理会计系统

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我国信息社会发展与波动研究

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兰州学刊 2015年第3期 175-179页

作者：肖锋李国璋兰州大学经济学院

利用国家信息中心2013年1月发布的信息社会发展指数(ISI),对我国信息社会及其重点领域发展水平作了比较分析和趋势分析,发现自2001年以来,我国信息化不断推进,信息化是遍及各省市的。然而,全国信息化的推进并不均衡。ISI指数年均增幅在2... 详细信息

利用国家信息中心2013年1月发布的信息社会发展指数(ISI),对我国信息社会及其重点领域发展水平作了比较分析和趋势分析,发现自2001年以来,我国信息化不断推进,信息化是遍及各省市的。然而,全国信息化的推进并不均衡。ISI指数年均增幅在2001年—2008年间仅4.4%,在2009年—2012年间为8.9%,增加了1倍多;地区间差距也在扩大,东、西部省市区信息社会存在"发展转型—相对停滞"的发展模式。在这样的背景下,文章研究了决定信息社会发展的决定因素,并比较研究信息社会发展较快地区和较慢地区的特征。主要的实证结果是:人力资源开发、生产方式转型、基础设施建设和数字包容发展对信息社会发展具有重要的促进作用。

关键词：信息社会发展与波动人力资源

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市场潜力、经济集聚与地区间工资差异

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财经科学 2011年第5期 71-78页

作者：李国璋戚磊兰州大学经济学院

基于劳动力、产业在地区间分布的不平衡性以及地区间工资差异的事实,本文构建了一个市场潜力与工资的新经济地理学(NEG)理论模型。理论分析表明:市场潜力对工资产生正面影响。市场潜力对工资产生正面影响来自两种渠道:一是市场潜力引发... 详细信息

基于劳动力、产业在地区间分布的不平衡性以及地区间工资差异的事实,本文构建了一个市场潜力与工资的新经济地理学(NEG)理论模型。理论分析表明:市场潜力对工资产生正面影响。市场潜力对工资产生正面影响来自两种渠道:一是市场潜力引发了经济集聚效应;二是市场潜力产生了逆经济集聚。相比之下,市场潜力引发了经济集聚效应更能提高和扩大地区工资水平与差异,因为经济集聚需要更低的贸易成本、较大的市场规模以及较高的经济发展水平。

关键词：市场潜力经济集聚地区工资差异

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市场可竞争性与绩效:对我国工业行业的实证分析

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统计研究 2006年第6期23卷 43-46页

作者：李国璋白明兰州大学经济学院

According to the theory of contestable markets, to promote the contestability of certain markets would make them perform better. To industrial organization theorists, sunk cost is the most important factor to effect contestability. So far, there is no specific methods to evaluate the magnitude of contestability. Nowadays, statutory regulation is the key factor to hinder China’ s markets getting more contestable. The reform, which is characterized by marketization, is not carried out simultaneously in all the industries, and there are significant gaps among different regions during the reforming process. This suggests us to take both industrial and regional aspects into account when we analyzing the markets’ contestability. This paper calculates the contestability index by multiplying the ratio of non-state-owned economy and regional marketization indices. Quantitative analyses show that economic performance can be made better along with the contestability grows.

关键词：可竞争性民营经济市场化可竞争指数绩效

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“一带一路”沿线国家制度质量量化研究——基于65个国家2003-2016年区际统计面板数据分析

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华东理工大学学报（社会科学版） 2018年第4期33卷 37-49,67页

作者：王杉李国璋上海行政学院经济教研部上海200237 兰州大学甘肃兰州730030

制度量化的研究内容是"衡量制度质量发展状况并将其量化"。各国制度质量在一定范围中通过与对手的竞争活动得以体现,并对该国对外贸易、国际投资和区域合作等跨国活动产生重要影响。本文以制度经济学理论为基础,明确制度概念和基本维度... 详细信息

制度量化的研究内容是"衡量制度质量发展状况并将其量化"。各国制度质量在一定范围中通过与对手的竞争活动得以体现,并对该国对外贸易、国际投资和区域合作等跨国活动产生重要影响。本文以制度经济学理论为基础,明确制度概念和基本维度,从经济、法律、政治、社会制度四个维度,建立包含正式和非正式制度的量化分析框架,构建"一带一路"沿线国家制度质量量化体系,以全面捕捉制度信息,量化"一带一路"沿线国家制度质量。研究表明,虽然各国制度质量差异较大,但可纳入八类相似族群且各具比较优势,而影响各国制度质量的众多制度因素可被归纳为八个基本因素,这为我国完善"一带一路"相关制度与政策设计提供制度质量量化信息依据。

关键词：一带一路制度质量量化研究

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