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Differences in hydrocarbon accumulation and controlling factors of slope belt in graben basin: A case study of Pinghu Slope Belt in the Xihu sag of the east China Sea Shelf basin(ECSSB)
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作者 Bo Yan Hong-Qi Yuan +5 位作者 Ning Li Wei Zou Peng Sun Meng Li Yue-Yun Zhao Qian Zhao 《Petroleum Science》 SCIE EI CAS 2024年第5期2901-2926,共26页
The Pinghu slope belt in the Xihu sag of the East China Sea Shelf Basin(ECSSB) is a crucial hydrocarbon production area in eastern China. However, due to the complex geological conditions, publications have lacked com... The Pinghu slope belt in the Xihu sag of the East China Sea Shelf Basin(ECSSB) is a crucial hydrocarbon production area in eastern China. However, due to the complex geological conditions, publications have lacked comprehensive research on the spatial-temporal coupling relationships of primary factors that impact hydrocarbon accumulation in the Pinghu slope belt. Furthermore, the hydrocarbon distribution patterns and the controlling factors across different study areas within the same slope belt are not yet fully understood. This study extensively utilized three-dimensional seismic data, well logging data,geochemical analysis, fluorescence analysis, and oil testing and production data to address these issues.Following a “stratification and differentiation” approach, the study identified seven distinct hydrocarbon migration and accumulation units(HMAU) in the Pinghu slope area based on the structural morphology characteristics, hydrocarbon source-reservoir-cap rock patterns, hydrocarbon migration pathways, and hydrocarbon supply range. Detailed analysis was conducted to examine the hydrocarbon distribution patterns and controlling factors within each migration and accumulation unit across different structural units, including high, medium, and low structural components. All data sources support a “southern-northern sub-area division, eastern-western sub-belt division, and variations in hydrocarbon accumulation” pattern in the Pinghu slope belt. The degree of hydrocarbon accumulation is controlled by the factors of structural morphology, hydrocarbon generation potential of source rocks, the spatial position of source slopes, fault sealing capacity, and sand body distribution. Furthermore, different coupling patterns of faults and sand bodies play a pivotal role in governing hydrocarbon enrichment systems across various migration and accumulation units. These observations indicate that three hydrocarbon accumulation patterns have been established within the slope belt, including near-source to far-source gentle slope with multiple hydrocarbon kitchens in the XP1-XP4 zones, near-source to middle-source gentle slope with dual-hydrocarbon kitchens in the XP5 zone, and near-source steep slope with a single hydrocarbon kitchen in the XP6-XP7 zones. These findings contribute to enhancing the theoretical system of hydrocarbon accumulation in the slope belt. 展开更多
关键词 East China Sea Shelf Basin(ECSSB) Pinghu slope belt Variation in hydrocarbon accumulation Controlling factors of hydrocarbon accumulation Hydrocarbon accumulation pattern
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Seismic Sedimentology and Its Application in Shallow Sea Area,Gentle Slope Belt of Chengning Uplift 被引量:11
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作者 张宪国 林承焰 张涛 《Journal of Earth Science》 SCIE CAS CSCD 2010年第4期471-479,共9页
Seismic sedimentology is a new frontier inter-discipline subject, and shows good prospect and potentiality in reservoir deposition research with seismic data and geophysics technologies. We made seismic sedimentology ... Seismic sedimentology is a new frontier inter-discipline subject, and shows good prospect and potentiality in reservoir deposition research with seismic data and geophysics technologies. We made seismic sedimentology research of shallow sea area, gentle slope belt of Chengning (埕宁) uplift, Bohalwan (渤海湾) basin. In shallow sea area with sparse well coverage, it was difficult to characterize the reservoir architecture with the traditional method based on wells. A new method to resolve the above problems is built: (1) information on plane and in section is inter-ealibrated with each other; (2) recognize the isochronic surfaces by frequency decomposition and interpret the depositional character with technology of stratal slicing; (3) make a comprehensive research with the stratal slice interpreta- tion and the dissection of well group. The depositional model of this area is built and used in the architecture analysis of area without wells. The architecture description reveals that the sedimentary character of pan-connection sand bodies in braided rivers is the reason for high water cut of the new horizontal wells. . 展开更多
关键词 seismic sedimentology shallow sea area gentle slope belt of Chenguing uplift braided river ARCHITECTURE braided bar
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Response of ecosystem service value to land use/cover change in the northern slope economic belt of the Tianshan Mountains, Xinjiang, China 被引量:3
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作者 SUN Chen MA Yonggang GONG Lu 《Journal of Arid Land》 SCIE CSCD 2021年第10期1026-1040,共15页
Land use/cover change(LUCC)is becoming more and more frequent and extensive as a result of human activities,and is expected to have a major impact on human welfare by altering ecosystem service value(ESV).In this stud... Land use/cover change(LUCC)is becoming more and more frequent and extensive as a result of human activities,and is expected to have a major impact on human welfare by altering ecosystem service value(ESV).In this study,we utilized remote sensing images and statistical data to explore the spatial-temporal changes of land use/cover types and ESV in the northern slope economic belt of the Tianshan Mountains in Xinjiang Uygur Autonomous Region,China from 1975 to 2018.During the study period,LUCC in the study region varied significantly.Except grassland and unused land,all the other land use/cover types(cultivated land,forestland,waterbody,and construction land)increased in areas.From 1975 to 2018,the spatial-temporal variations in ESV were also pronounced.The total ESV decreased by 4.00×10^(8) CNY,which was primarily due to the reductions in the areas of grassland and unused land.Waterbody had a much higher ESV than the other land use/cover types.Ultimately,understanding the impact of LUCC on ESV and the interactions among ESV of different land use/cover types will help improve existing land use policies and provide scientific basis for developing new conservation strategies for ecologically fragile areas. 展开更多
关键词 land use/cover types ecosystem services human activities economic development URBANIZATION the northern slope economic belt of the Tianshan Mountains
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Temporal and spatial responses of ecological resilience to climate change and human activities in the economic belt on the northern slope of the Tianshan Mountains, China 被引量:2
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作者 ZHANG Shubao LEI Jun +4 位作者 TONG Yanjun ZHANG Xiaolei LU Danni FAN Liqin DUAN Zuliang 《Journal of Arid Land》 SCIE CSCD 2023年第10期1245-1268,共24页
In the Anthropocene era,human activities have become increasingly complex and diversified.The natural ecosystems need higher ecological resilience to ensure regional sustainable development due to rapid urbanization a... In the Anthropocene era,human activities have become increasingly complex and diversified.The natural ecosystems need higher ecological resilience to ensure regional sustainable development due to rapid urbanization and industrialization as well as other intensified human activities,especially in arid and semi-arid areas.In the study,we chose the economic belt on the northern slope of the Tianshan Mountains(EBNSTM)in Xinjiang Uygur Autonomous Region of China as a case study.By collecting geographic data and statistical data from 2010 and 2020,we constructed an ecological resilience assessment model based on the ecosystem habitat quality(EHQ),ecosystem landscape stability(ELS),and ecosystem service value(ESV).Further,we analyzed the temporal and spatial variation characteristics of ecological resilience in the EBNSTM from 2010 to 2020 by spatial autocorrelation analysis,and explored its responses to climate change and human activities using the geographically weighted regression(GWR)model.The results showed that the ecological resilience of the EBNSTM was at a low level and increased from 0.2732 to 0.2773 during 2010–2020.The spatial autocorrelation analysis of ecological resilience exhibited a spatial heterogeneity characteristic of"high in the western region and low in the eastern region",and the spatial clustering trend was enhanced during the study period.Desert,Gobi and rapidly urbanized areas showed low level of ecological resilience,and oasis and mountain areas exhibited high level of ecological resilience.Climate factors had an important impact on ecological resilience.Specifically,average annual temperature and annual precipitation were the key climate factors that improved ecological resilience,while average annual evapotranspiration was the main factor that blocked ecological resilience.Among the human activity factors,the distance from the main road showed a negative correlation with ecological resilience.Both night light index and PM2.5 concentration were negatively correlated with ecological resilience in the areas with better ecological conditions,whereas in the areas with poorer ecological conditions,the correlations were positive.The research findings could provide a scientific reference for protecting the ecological environment and promoting the harmony and stability of the human-land relationship in arid and semi-arid areas. 展开更多
关键词 ecological resilience ecosystem habitat quality ecosystem landscape stability ecosystem service value spatial autocorrelation analysis geographically weighted regression model economic belt on the northern slope of the Tianshan Mountains
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Genetic Types and Exploration Significance of Slope Break Belt in Paleogene in Qikou Sag,Huanghua Depression,Bohai Bay Basin,Eastern China
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作者 Chuanyan Huang~(1,2),Hua Wang~1,Peigang Ren~1,Shi Chen~1 1.Key Laboratory of Tectonics and Petroleum Resources,Ministry of Education,Faculty of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,China. 2.State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期228-228,共1页
Enrichment of hydrocarbon reservoir relates to the slope break types in continental basin(sag)in China. Division and analysis of genetic types of slope break will help to study the enrichment regularity of hydrocarbon... Enrichment of hydrocarbon reservoir relates to the slope break types in continental basin(sag)in China. Division and analysis of genetic types of slope break will help to study the enrichment regularity of hydrocarbon reservoir and is conducive to the guiding of future development in exploration and enhancing prediction accuracy.This paper,guided by the theory of sequence stratigraphy and using high-resolution three-dimensional seismic data,drilling and other information,takes into account the characteristics 展开更多
关键词 slope BREAK belt subtle reservoir PALEOGENE Qikou SAG in Huanghua DEPRESSION Bohai BAY Basin EASTERN China
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Evolution of economic linkage network of the cities and counties on the northern slope of the Tianshan Mountains,China
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作者 YANG Zeyu ZHANG Shubao +4 位作者 LEI Jun ZHANG Xiaolei TONG Yanjun DUAN Zuliang FAN Liqin 《Regional Sustainability》 2023年第2期173-184,共12页
The exchanges between cities and counties in the northern slope economic belt of Tianshan Mountains(NSEBTM)are increasingly frequent and the economic linkages are increasingly close,but the spatial distribution of eco... The exchanges between cities and counties in the northern slope economic belt of Tianshan Mountains(NSEBTM)are increasingly frequent and the economic linkages are increasingly close,but the spatial distribution of economic development and linkages among the cities and counties within NSEBTM is uneven.Therefore,it is of great significance to study the evolution of spatial-temporal pattern of the economic linkage network of cities and counties on NSEBTM to promote the coordinated and integrated development of the regional economy on NSEBTM.In this study,we used the modified gravity model and social network analysis method to analyze the spatio-temporal evolution characteristics of the economic linkage network structure of cities and counties on NSEBTM in 2000,2010,and 2020.The results showed that the comprehensive development quality level of cities and counties on NSEBTM increased from 2000 to 2020,its growth rate also increased,and its gap between cities and counties continued expanding.Both the spatial distribution patterns of the comprehensive development quality level of cities and counties on NSEBTM in 2000 and 2010 were presented as“high in the middle and low at both ends”,while the spatial distribution pattern of 2020 was exhibited as“high value and low value staggered”.The total amount of external economic linkages of cities and counties on NSEBTM showed an obvious upward trend,and its gap between cities and counties continued expanding,presenting a pattern of“a strong middle section and weak ends”.The direction of economic linkages of NSEBTM existed obvious central orientation and geographical proximity.The density of economic linkage network of NSEBTM increased from 2000 to 2020,and the structure of economic linkage network changed from single-core structure centered with Urumqi City to multicore structure centered with Urumqi City,Karamay City,Shihezi City,and Changji City,shifting from unbalanced development to balanced development.In the future,we should accelerate the construction of urban agglomeration on NSEBTM,cultivate a modern Urumqi metropolitan area,improve comprehensive development quality of the cities and counties at the eastern and western ends,strengthen the intensity of economic linkages between cities and counties,optimize the economic linkage network,and promote the coordinated and integrated development of regional economy. 展开更多
关键词 Entropy method Economic linkages Gravity model Network structure Social network analysis Northern slope economic belt of Tianshan Mountains China
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海拉尔盆地中部断陷带下白垩统南屯组致密储层特征及有利区预测
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作者 田亚 李军辉 +4 位作者 陈方举 李跃 刘华晔 邹越 张晓扬 《岩性油气藏》 CAS CSCD 北大核心 2024年第4期136-146,共11页
综合运用岩心分析、铸体薄片、高压压汞等资料,对海拉尔盆地中部断陷带下白垩统南屯组储层特征及其主控因素开展了详细研究,并对有利区进行了定量综合评价。研究结果表明:(1)海拉尔盆地中部断陷带南屯组岩石类型主要为岩屑砂岩和长石岩... 综合运用岩心分析、铸体薄片、高压压汞等资料,对海拉尔盆地中部断陷带下白垩统南屯组储层特征及其主控因素开展了详细研究,并对有利区进行了定量综合评价。研究结果表明:(1)海拉尔盆地中部断陷带南屯组岩石类型主要为岩屑砂岩和长石岩屑砂岩,储层孔隙度小于12%的样品数占总样品数的70.2%,渗透率小于1 mD的样品数占总样品数的66.3%,属于致密砂岩储层,储层储集空间主要为少量原生孔隙和大量次生溶蚀孔隙。(2)沉积相控制了研究区储层物性在空间上的总体分布规律,南屯组最有利的沉积相带是辫状河三角洲前缘和扇三角洲前缘亚相;压实作用对储层具有减孔效应,溶蚀作用普遍发育,形成了大量粒间和粒内溶孔,对储集性具有一定改善作用。(3)盆地中部断陷带发育缓坡断阶构造带、陡坡断阶构造带和洼槽带3种构造带,其中缓坡断阶构造带和陡坡断阶构造带为主要的油气聚集区带,其断裂的大量发育均早于或同期于烃源岩大量排烃阶段,为油气运移提供了通道。(4)将“沉积相-孔隙度-储层厚度-砂地比-埋藏深度”五要素进行叠合,定量评价有利储层发育区,其中Ⅰ类、Ⅱ类优质储层主要分布在盆地中部断陷带的缓坡断阶构造带和陡坡断阶构造带。 展开更多
关键词 致密储层 辫状河三角洲前缘 扇三角洲前缘 缓坡断阶构造带 陡坡断阶构造带 南屯组 下白垩统 中部断陷带 海拉尔盆地
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Physical Modeling of Landslide Mechanism in Oblique Thick-Bedded Rock Slope: A Case Study 被引量:5
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作者 FENG Zhen YIN Yueping +1 位作者 LI Bin YAN Jinkai 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2013年第4期1129-1136,共8页
The Jiweishan landslide illustrates the failure pattern of an apparent dip slide of an oblique thick-bedded rockslide. Centrifugal modeling was performed using a model slope consisting of four sets of joints to invest... The Jiweishan landslide illustrates the failure pattern of an apparent dip slide of an oblique thick-bedded rockslide. Centrifugal modeling was performed using a model slope consisting of four sets of joints to investigate the landslide initiation mechanism. Crack strain gauges pasted between the slide blocks and the base failed in sequence from the rear to the front as the centrifugal acceleration increased. When the acceleration reached 16.3g, the instantaneous failure of the key block in the front triggered the apparent dip slide of all blocks. The physical modeling results and previous studies suggest that the strength reduction in the weak layer and the failure of the key block are the main reasons for the Jiweishan landslide. The centrifuge experiment validated the previously proposed driving-blocks-key-block model of apparent dip slide in oblique with inclined bedding rock slopes. In addition, the results from limit equilibrium method and centrifuge test suggest that even though the failure of the key block in the front is instantaneous, a progressive stable-unstable transition exists. 展开更多
关键词 CENTRIFUGE key block driving blocks karstification belt apparent dip slide oblique thick-bedded rock slope
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天山北坡经济带城乡聚落格局变化与影响因素分析
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作者 郑旭东 王宏卫 +2 位作者 罗魁 吴常蕊 闫晓梅 《华侨大学学报(自然科学版)》 CAS 2024年第3期383-393,共11页
以天山北坡经济带城乡聚落为研究对象,采用景观格局指数、地理信息系统(GIS)空间分析、位序-规模法等分析1980-2020年间城乡聚落格局的变化,结合地理探测器从自然、区位及社会经济因素探究城乡聚落格局的影响因素。结果表明:1980-2020年... 以天山北坡经济带城乡聚落为研究对象,采用景观格局指数、地理信息系统(GIS)空间分析、位序-规模法等分析1980-2020年间城乡聚落格局的变化,结合地理探测器从自然、区位及社会经济因素探究城乡聚落格局的影响因素。结果表明:1980-2020年间,城乡聚落数量、规模持续扩张且趋于集聚,前20 a扩张以耕地、草地为主,后20 a以未利用地为主;城乡聚落密度变化显著,高密度区主要集中在各绿洲呈现“多核集中分布”特征,中密度区沿高密度区周围扩张,低密度区沿绿洲边缘分布并在非绿洲区有扩张;首位聚落规模发展较好,趋于位序-规模曲线,中型聚落略微发育,小型聚落数量持续减少;交通等区位因素是天山北坡城乡聚落格局的首位影响因素,社会经济因素次之,自然地理因素影响较小,各影响因素差异显著。 展开更多
关键词 城乡聚落 景观格局 位序-规模法 地理探测器 天山北坡经济带
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超大规模硬岩矿山源头推动TBM应用的设计创新与思考
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作者 徐长磊 刘育明 +1 位作者 邓皓泽 孙学森 《中国矿山工程》 2024年第1期65-71,共7页
西鞍山铁矿是一座超大规模开采矿山,采用TBM施工胶带斜井、斜坡道是该技术在国内地下铁矿山首次应用。TBM施工与钻爆法施工在勘察、设计和施工等方面均有较大差异,本文基于应TBM施工铁矿井巷工程,结合设备性能与开拓系统工艺需求,在斜... 西鞍山铁矿是一座超大规模开采矿山,采用TBM施工胶带斜井、斜坡道是该技术在国内地下铁矿山首次应用。TBM施工与钻爆法施工在勘察、设计和施工等方面均有较大差异,本文基于应TBM施工铁矿井巷工程,结合设备性能与开拓系统工艺需求,在斜井线路规划、曲线半径选择、始发场地设计、始发段与接收段支护、正常段支护选型、巷道底板处理、硐门设计形式等开展了应用创新。同时结合项目设计、施工中遇到的问题,对适用于矿山工程的TBM施工勘察技术要求、施工方案的选择及提高TBM施工断面利用率进行了分析与探讨。 展开更多
关键词 硬岩矿山 TBM应用 胶带斜井 斜坡道
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超压盆地水力破裂与天然气成藏的关系——以莺歌海盆地乐东斜坡区LD-A气田为例 被引量:1
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作者 贾茹 付晓飞 +4 位作者 范彩伟 靳叶军 王升 王海学 罗静爽 《天然气工业》 EI CAS CSCD 北大核心 2024年第6期23-32,共10页
莺歌海盆地乐东斜坡区LD-A气田的发现进一步证实了高温高压岩性圈闭领域的巨大资源潜力。该气田储层压力系数最高可达2.3,流体超压诱发的水力破裂对天然气的运聚起到重要的控制作用,明确超压条件下地层是否发生水力破裂及其演化过程是... 莺歌海盆地乐东斜坡区LD-A气田的发现进一步证实了高温高压岩性圈闭领域的巨大资源潜力。该气田储层压力系数最高可达2.3,流体超压诱发的水力破裂对天然气的运聚起到重要的控制作用,明确超压条件下地层是否发生水力破裂及其演化过程是深入研究莺歌海盆地天然气成藏的关键。为此,在明确天然气垂向输导体系的基础上,以岩石破裂准则为理论依据,利用地应力及岩石抗张强度确定水力破裂模式,厘定了地层水力破裂条件;最终结合超压演化,分析了水力破裂动态演化过程对天然气成藏过程的控制作用。研究结果表明:(1)断裂、亚地震断裂和裂缝共同构成了LD-A气田天然气垂向输导体系,超压诱发的水力破裂控制了输导体系的启闭性和有效性,决定了天然气能否规模富集。(2)LD-A气田的中深层发育张性水力破裂,其中LD-A1气区现今黄流组顶部处于水力封闭状态,梅山组顶部处于水力渗漏状态;LD-A2气区和LD-A3气区上中新统黄流组顶部和中中新统梅山组顶部现今均处于水力封闭状态。(3)LD-A气田的水力破裂演化存在封闭—破裂—封闭型(LD-A1气区与LD-A2气区)和持续封闭型(LD-A3气区)2种类型,不同的水力破裂演化过程导致了天然气在不同层位砂体差异性充注和富集。结论认为,LD-A1气区与LD-A2气区浅层上新统莺歌海组二段和上中新统黄流组优质砂体是天然气有利富集对象,LD-A3气区应在埋藏更深的梅山组砂岩中寻找突破。 展开更多
关键词 莺歌海盆地 乐东斜坡区 超压 水力破裂 输导体系 天然气成藏
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库水升降作用下灰岩岸坡稳定性数值研究
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作者 刘新荣 李沛瑶 +4 位作者 刘馨琳 郭雪岩 周小涵 罗新飏 王浩 《自然灾害学报》 CSCD 北大核心 2024年第5期23-37,共15页
基于现场调研与采样,采用室内力学试验测定灰岩力学参数与干湿循环下强度劣化规律;基于UDEC建立库岸边坡数值模型,研究了三峡库区反倾岸坡、顺层岸坡、近水平层状岸坡及含危岩体岸坡在库水升降作用下的失稳演化过程及消落带劣化深度与... 基于现场调研与采样,采用室内力学试验测定灰岩力学参数与干湿循环下强度劣化规律;基于UDEC建立库岸边坡数值模型,研究了三峡库区反倾岸坡、顺层岸坡、近水平层状岸坡及含危岩体岸坡在库水升降作用下的失稳演化过程及消落带劣化深度与岩层厚度对岸坡稳定性的影响规律。结果表明:库水升降作用下岸坡的失稳过程可以分为裂隙萌生发育、裂隙发展贯通和坡体失稳破坏阶段;随着消落带劣化深度的增加,4种岸坡稳定性系数降低;随着岩层厚度的增加,4种岸坡的稳定性系数升高。近水平层状岸坡稳定性系数受以上2种因素影响最大,而随着干湿循环次数增加发生的变化最小;当劣化深度大于10 m以及岩层厚度大于5 m时,含危岩体岸坡稳定性系数随影响因素水平变化而产生的变化量较小。长远来看,受库水影响的4种典型岩质岸坡稳定性从大到小依次为反倾岸坡、近水平层状岸坡、顺层岸坡、含危岩体岸坡。 展开更多
关键词 消落带劣化 库岸边坡 数值模拟 失稳破坏 岩体稳定性
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三峡库区碳酸岩岸坡消落带岩体劣化特性
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作者 张国栋 夏文中 +1 位作者 何钰铭 危灿 《山地学报》 CSCD 北大核心 2024年第1期70-80,共11页
岸坡消落带是库水位升降形成的干湿交替作用区域。与岸坡其他地段相比,岸坡消落带水岩作用强烈,不断改造库岸的形貌特征,影响岸坡的整体或局部稳定性。消落带岩体劣化研究在劣化特征、劣化分类,以及劣化评价方法、指标研究方面存在不足... 岸坡消落带是库水位升降形成的干湿交替作用区域。与岸坡其他地段相比,岸坡消落带水岩作用强烈,不断改造库岸的形貌特征,影响岸坡的整体或局部稳定性。消落带岩体劣化研究在劣化特征、劣化分类,以及劣化评价方法、指标研究方面存在不足。本文以三峡库区秭归和巴东干(支)流碳酸岩岸坡消落带岩体为研究对象,采取调(勘)查与试验、“比拟法”等综合分析方法,对碳酸岩消落区岩体劣化特征、过程及机制进行了系统研究,得到以下结论。(1)基于岸坡消落区岩体劣化的宏观效应,可划分为4种劣化类型;库水和地下水联动作用影响消落区岩体劣化的范围,沿深度方向呈现逐渐减弱的趋势,根据岩体劣化程度,可划分为3个区。(2)岩体各类结构面劣化最为严重,尤其是裂隙结构面,控制着岩体劣化的主要特征和类型。(3)库水作用方式和水的溶蚀性强弱影响岩体劣化的进展和演化发展模式。(4)根据库水与岸坡地下水联动程度,结合工程应用,提出了碳酸岩岸坡消落带岩体劣化的评价指标和评价方法。研究成果对消落带岩体劣化评价及岸坡稳定性演化评价具有一定的参考意义。 展开更多
关键词 消落带 碳酸岩岸坡 水岩作用 岩体劣化 三峡库区
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近60a天山北坡经济带天然径流量时空变化及归因识别
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作者 李宇航 余文学 +3 位作者 杨永均 朱燕峰 马静 陈浮 《干旱区研究》 CSCD 北大核心 2024年第9期1446-1455,共10页
天山北坡经济带地处干旱的亚洲腹地,厘清天然径流量(NR)时空变化及成因对统筹区域发展、维持生态安全至关重要。为此,采用Sen’s斜率估计法、Mann-Kendall趋势检验等分析径流量时空变化,基于Budyko假设的水热耦合平衡方程定量评价降水... 天山北坡经济带地处干旱的亚洲腹地,厘清天然径流量(NR)时空变化及成因对统筹区域发展、维持生态安全至关重要。为此,采用Sen’s斜率估计法、Mann-Kendall趋势检验等分析径流量时空变化,基于Budyko假设的水热耦合平衡方程定量评价降水、潜在蒸散发及下垫面对NR变化的贡献。结果表明:(1)近60a天山北坡经济带NR总体呈显著增加趋势,年变化率0.68mm·a-1。1961—1986年波动较大,1987—2012年波动变小且NR增加明显,2013年后NR显著减少。(2)NR大小与海拔变化在空间上高度叠合,天山北坡经济带西部和南部NR较大,西南部与西北部增长幅度大。(3)NR突变点为1980年与2013年,降水一直是NR变化的主导因素,但下垫面影响不断加大,近60a贡献率从31.5%增至45.5%。(4)2012年前天然径流量主要受降水主导,但不同区域影响不同。2013年,西部、东部与中南部下垫面对径流量的影响已超过降水成为主导因素。研究成果深化了天山北坡经济带NR变化的认识,为天山北坡经济带高质量发展提供科学支撑。 展开更多
关键词 天然径流量变化 时空格局 降水 下垫面 天山北坡经济带
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考虑消落带岩体劣化影响的典型危岩岸坡稳定性研究
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作者 刘新荣 王浩 +3 位作者 郭雪岩 罗新飏 周小涵 许彬 《岩土力学》 EI CAS CSCD 北大核心 2024年第2期563-576,共14页
三峡库区周期性水位升降引起的消落带岩体劣化对典型危岩岸坡稳定性具有重大影响。基于野外调研及地勘资料,采用通用离散单元法程序(universal distinct element code,简称UDEC)研究了消落带劣化区形态对近水平层状高陡危岩岸坡的稳定... 三峡库区周期性水位升降引起的消落带岩体劣化对典型危岩岸坡稳定性具有重大影响。基于野外调研及地勘资料,采用通用离散单元法程序(universal distinct element code,简称UDEC)研究了消落带劣化区形态对近水平层状高陡危岩岸坡的稳定性影响。研究表明:目前三峡库区巫山段的近水平层状危岩岸坡消落带岩体劣化严重,在不同消落带劣化区存在紧密层状、松散碎裂状、溶蚀凹腔状、含挤压碎裂带等典型消落带劣化区形态;含有第1种消落带劣化区形态的危岩岸坡稳定性较好,危岩体位移较小,失稳模式为滑移破坏;含有第2种消落带劣化区形态的危岩岸坡危岩体先向坡内偏移,其后随着消落带岩体支撑强度弱化向坡外倾倒破坏;含有第3种消落带劣化区形态的危岩岸坡危岩体向坡外位移较大,失稳模式为倾倒破坏;含有第4种消落带劣化区形态的危岩岸坡稳定性主要受挤压破碎带的力学性质控制,易产生沿破碎带切割面的旋转滑移破坏;通过对以上4种劣化区形态的危岩岸坡增加防治加固措施,危岩体的变形位移得到了不同程度的有效控制。 展开更多
关键词 危岩岸坡 消落带劣化区形态 野外调研 通用离散单元法程序(UDEC) 数值模拟 劣化特征 稳定性
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多级坡折带对颗粒滩储层的控制及有利勘探区带——以四川盆地乐山—龙女寺古隆起南斜坡寒武系洗象池组为例
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作者 马涛 谭秀成 +6 位作者 罗冰 和源 许强 黄茂轩 李启锐 龙虹宇 胡安平 《石油勘探与开发》 EI CAS CSCD 北大核心 2024年第6期1317-1330,共14页
基于二维、三维地震和测录井资料,开展四川盆地乐山—龙女寺古隆起南斜坡中上寒武统洗象池组井-震地层充填及滩控储层分布规律研究,以揭示地层充填、古地貌与规模颗粒滩的成因联系。结果表明:①研究区洗象池组渐次向乐山—龙女寺古隆起... 基于二维、三维地震和测录井资料,开展四川盆地乐山—龙女寺古隆起南斜坡中上寒武统洗象池组井-震地层充填及滩控储层分布规律研究,以揭示地层充填、古地貌与规模颗粒滩的成因联系。结果表明:①研究区洗象池组渐次向乐山—龙女寺古隆起超覆充填,仅在古隆起剥蚀尖灭线附近,地层因削顶而急剧减薄,因此识别出2个超覆坡折带和1个削蚀坡折带,并将区内洗象池组由下至上划分为4段;②底超顶削的地层充填模式表明,洗象池组厚度可反映其沉积前古地貌,揭示了研究区具有向东南倾伏的、多级坡折控制的单斜式地貌特征;③规模颗粒滩及滩控储层纵向上主要发育于洗三段和洗四段中,横向上主要发育于多级超覆坡折带附近;④超覆坡折带与北西倾向的逆断层密切相关,中晚寒武世华南板块西缘与羌塘—喜马拉雅地块聚合,导致扬子板块西北缘快速抬升,并向东南扩展,形成逐渐倾伏的多级坡折地貌,进而形成多条北东向展布的规模颗粒滩储层发育带。结合油气测试结果,预测滩控储层有利勘探区带面积可达3340 km^(2)。 展开更多
关键词 有利勘探区带 超覆坡折带 颗粒滩 洗象池组 南斜坡 四川盆地 乐山—龙女寺古隆起
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天山北坡经济带经济韧性与生态韧性的时空耦合
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作者 王新兴 赵雪雁 《生态学报》 CAS CSCD 北大核心 2024年第21期9670-9683,共14页
如何平衡经济-生态间的关系,以应对外部扰动和冲击,成为促进区域可持续发展的关键。借鉴韧性理论,构建了生态韧性和经济韧性评价指标体系,基于多源数据,利用耦合协调度模型和核密度方法分析了天山北坡经济带经济韧性与生态韧性的时空耦... 如何平衡经济-生态间的关系,以应对外部扰动和冲击,成为促进区域可持续发展的关键。借鉴韧性理论,构建了生态韧性和经济韧性评价指标体系,基于多源数据,利用耦合协调度模型和核密度方法分析了天山北坡经济带经济韧性与生态韧性的时空耦合特征,并探索了各要素对二者耦合协调度的影响。结果发现:①2000—2020年天山北坡经济带经济韧性总体以中等水平为主,呈现天山北坡“中段>西段>南部>东段”的空间分异特征;②生态韧性则总体处于低水平,呈现“西北高东南低”“低值集聚、高值分散”的空间分布特征;③经济韧性和生态韧性一直处于“失调”状态,但逐渐由轻度失调向濒临失调转变,且西段和中段的耦合协调度高于东段和南部;④经济韧性与生态韧性各要素对耦合协调度的影响存在差异,其中经济潜力韧性和生态系统抵抗力对经济韧性和生态韧性耦合协调关系的阻滞作用最强,经济结构韧性和生态系统恢复力对经济韧性和生态韧性耦合协调关系的推动作用最强。通过时空动态分析和关键影响因素的识别,本研究为可持续发展政策提供了综合视角。平衡这两个方面不仅对该地区当前的稳定至关重要,也是确保其在未来挑战中长期生存的关键所在。 展开更多
关键词 经济韧性 生态韧性 耦合协调度 时空特征 天山北坡经济带
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西湖凹陷平湖斜坡带物源-坡折耦合控砂模式
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作者 李帅 俞伟哲 +1 位作者 秦兰芝 张粲 《海洋地质前沿》 CSCD 北大核心 2024年第7期36-44,共9页
平湖斜坡带为西湖凹陷岩性油气藏勘探的重要区域之一。勘探开发实践证实,平湖斜坡带平湖组砂体展布复杂,控砂模式指导下的砂体刻画已成为岩性油气藏勘探突破的关键。从物源体系研究出发,结合坡折带特征分析,梳理了研究区物源坡折耦合控... 平湖斜坡带为西湖凹陷岩性油气藏勘探的重要区域之一。勘探开发实践证实,平湖斜坡带平湖组砂体展布复杂,控砂模式指导下的砂体刻画已成为岩性油气藏勘探突破的关键。从物源体系研究出发,结合坡折带特征分析,梳理了研究区物源坡折耦合控制下的砂体展布特征。沟谷及重矿物特征表明,研究区存在海礁隆起西部、西南部稳定物源及宝云亭凸起动态物源三大物源体系,控制了研究区储层沉积物来源;受隆起、断裂差异活动及沉积作用控制,研究区发育的断裂坡折、挠曲坡折和沉积坡折共同控制了研究区地形特征。物源体系与坡折耦合控制了沉积物从源到汇的动态过程:平湖组下段由西南物源及宝云亭凸起动态物源共同控制,发育混源堆积型控砂模式;平湖组中段由西部海礁隆起物源主控,以挠曲坡折限制的单源改造型控砂模式为主;平湖组上段由沉积坡折主控,发育缓坡过渡型控砂模式。 展开更多
关键词 平湖斜坡带 物源 坡折带 控砂模式 岩性油气藏
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西湖凹陷平北斜坡带平湖组层序构型差异及控砂模式
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作者 徐东浩 秦兰芝 +2 位作者 李峻颉 蔡坤 谢晶晶 《地质科技通报》 CAS CSCD 北大核心 2024年第4期154-166,共13页
平北斜坡带是西湖凹陷岩性油气藏勘探的重点区带之一,但实际勘探过程中存在岩性砂体厚度小、横向变化大等问题,亟需开展不同构造单元内地层发育样式、沉积中心变迁、砂体发育机制等构造-沉积响应研究。基于最新钻井、测井及覆盖全区的... 平北斜坡带是西湖凹陷岩性油气藏勘探的重点区带之一,但实际勘探过程中存在岩性砂体厚度小、横向变化大等问题,亟需开展不同构造单元内地层发育样式、沉积中心变迁、砂体发育机制等构造-沉积响应研究。基于最新钻井、测井及覆盖全区的高精度三维地震资料,开展了平北斜坡带平湖组三级层序-体系域高精度层序地层研究。基于古地貌、断裂体系的差异,划分了平北斜坡带构造-沉积单元,分析了不同单元内层序构型下断裂组合样式、地层接触关系、沉积充填样式的差异,探讨了不同层序构型差异的控制因素和控砂模式。研究表明,平北斜坡带可以划分为断裂陡坡型、对向断阶型、反向断阶型、顺向断阶型4种层序构型,层序构型差异受物源供给强弱变化、断裂体系活动差异、微古地貌转换调节、基准旋回迁移变化等控制,形成了4种砂体发育模式。通过不同构造单元层序构型差异和控砂机制研究,对于推动西湖凹陷平北斜坡带岩性油气藏领域勘探进程意义重大。 展开更多
关键词 平北斜坡带 平湖组 层序构型 控砂模式
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带式输送机防飘带技术应用研究
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作者 武学宏 《机械管理开发》 2024年第3期307-308,311,共3页
高曲矿18406底抽巷带式输送机设计时坡度较大,通常发生变坡点突然抬升22°,这会导致变坡点中间位置发生抬高。受地质构造的影响巷道坡度较大,皮带输送机在启动或空载运行过程中经常会产生“飘带”现象,基于此,对18406底抽巷大倾角... 高曲矿18406底抽巷带式输送机设计时坡度较大,通常发生变坡点突然抬升22°,这会导致变坡点中间位置发生抬高。受地质构造的影响巷道坡度较大,皮带输送机在启动或空载运行过程中经常会产生“飘带”现象,基于此,对18406底抽巷大倾角带式输送机初始设计方案进行优化设计,并投入实践应用。当前,优化后的防飘带技术已运行近1年时间,变坡段未发生输送带飘带、跑偏、撕裂等安全事故发生,安全经济效益显著。 展开更多
关键词 变坡点 带式输送机 压带轮 飘带
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