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Sedimentary model reconstruction and exploration significance of Permian He 8 Member in Ordos Basin,NW China 预览
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作者 XIAO Hongping LIU Rui’e +2 位作者 ZHANG Fudong LIN Changsong ZHANG Mengyuan 《石油勘探与开发:英文版》 2019年第2期280-292,共13页
Based on the Late Paleozoic geological background and the latest exploration achievements of the Ordos Basin and North China platform, it is concluded that during the sedimentary period of Permian He 8 Member, the are... Based on the Late Paleozoic geological background and the latest exploration achievements of the Ordos Basin and North China platform, it is concluded that during the sedimentary period of Permian He 8 Member, the area in concern had multiple material sources, multiple river systems, flat terrain, shallow sedimentary water, widely distributed fluvial facies sand body and no continuous lake area, so alluvial river sedimentary system developed in the whole region. Based on stratigraphic correlation and division, and a large number of drilling and outcrop data, a comprehensive analysis of lithofacies and sedimentary facies types and distribution was carried out to reconstruct the ancient geographic pattern of the He 8 Member sedimentary period. The results of paleogeography restoration show that the area of Ordos Basin was the "runoff area" in the sedimentary slope in the western part of the North China platform during the sedimentary period of He 8 Member, the whole region was mainly alluvial plain sedimentation featuring alternate fluvial facies, flood plain facies and flood-plain lake facies. According to the results of flume deposition simulation experiment, a new sedimentary model of "alluvial river & flood-plain lake" is established, which reveals the genesis of large area gravel sand body in He 8 Member of this area and provides geological basis for the exploration of tight gas in the south of the basin. 展开更多
关键词 ORDOS Basin He 8 MEMBER North China platform paleogeographic restoration ALLUVIAL river flood-plain lake SEDIMENTARY model exploration significance
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基于系统动力学的资源型城市转型模式实证研究——以鄂尔多斯为例
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作者 窦睿音 张生玲 刘学敏 《干旱区资源与环境》 CSSCI CSCD 北大核心 2019年第8期18-25,共8页
资源型城市的转型是由经济、资源、环境与社会协同构成的系统工程,转型模式复杂多样。不同的转型模式会直接影响城市转型效果,因此对转型模式的选择以及其合理性进行验证具有重要的理论与现实意义。基于此,文中针对资源型城市转型的复杂... 资源型城市的转型是由经济、资源、环境与社会协同构成的系统工程,转型模式复杂多样。不同的转型模式会直接影响城市转型效果,因此对转型模式的选择以及其合理性进行验证具有重要的理论与现实意义。基于此,文中针对资源型城市转型的复杂性,将系统动力学模型应用于资源型城市的转型模式研究中,并以鄂尔多斯为例,评价其转型模式与转型效果,以期为其他资源型城市的转型研究提供经验与借鉴。研究通过构建鄂尔多斯自然发展模式、农牧业重点、工业重点、第三产业重点、环境保护和循环协调共六种转型模式,最终确认循环协调发展模式能够实现城市经济发展的去自然资源化,从而实现城市经济社会发展与资源系统和环境系统耦合的可持续发展目标。 展开更多
关键词 资源型城市 系统动力学 转型模式 鄂尔多斯
Sedimentary and geochemical characteristics of the Triassic Chang 7 Member shale in the Southeastern Ordos Basin,Central China
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作者 Jing-Wei Cui Ru-Kai Zhu +1 位作者 Zhong Luo Sen Li 《石油科学:英文版》 SCIE CAS CSCD 2019年第2期285-297,共13页
The Ordos Basin is the largest petroliferous basin in China, where the Chang 7 Member shale serves as the major source rock in the basin, with an area of more than 100,000 km2 So far, sedimentary and geochemical chara... The Ordos Basin is the largest petroliferous basin in China, where the Chang 7 Member shale serves as the major source rock in the basin, with an area of more than 100,000 km2 So far, sedimentary and geochemical characterizations have rarely been conducted on the shale in shallow(< 1000 m) areas in the southeastern part of the basin, but such characterizations can help identify the genesis of organic-rich shale and promote the prediction and recovery of shale oil. In this paper,several outcrop sections of the Chang 7 Member in the Tongchuan area were observed and sampled, and sedimentary and geochemical characterizations were conducted for the well-outcropped YSC section. The study results show that the Chang7 Member shale is widely distributed laterally with variable thickness. The organic-rich shale is 7-25 m thick in total and exhibits obvious horizontal variation in mineral composition. In the eastern sections, the shale contains organic matter of TypeⅡ2-Ⅲ and is low in thermal maturity, with high clay mineral content, low K-feldspar content, and no pyrite. In the western sections, the shale contains Type Ⅱ1 organic matter and is low in thermal maturity, with high clay mineral, K-feldspar, and pyrite contents. The YSC section reveals three obvious intervals in vertical mineral composition and organic abundance.The Chang 7 Member organic-rich shale(TOC > 10%) contains mainly sapropelite and liptinite, with Type Ⅱ kerogen. It is generally characterized by a hydrocarbon potential of more than 70 mg/g, low maturity, and shallow-semideep lacustrine facies. In the western sections, the shale, still in a low maturity stage, has a higher hydrocarbon potential and is optional for shale oil recovery. However, the Chang 7 Member shale in the study area is highly heterogeneous and its shale oil recovery is practical only in the organic-rich intervals. 展开更多
关键词 ORDOS Basin CHANG 7 MEMBER oil Organic-rich SHALE SEDIMENTARY CHARACTERISTICS Geochemical CHARACTERISTICS
Pore-Throat Combination Types and Gas-Water Relative Permeability Responses of Tight Gas Sandstone Reservoirs in the Zizhou Area of East Ordos Basin,China 预览
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作者 LI Mi GUO Yinghai +2 位作者 LI Zhuangfu WANG Huaichang ZHANG Jingxia 《地质学报:英文版》 SCIE CAS CSCD 2019年第3期622-636,共15页
With the aim of better understanding the tight gas reservoirs in the Zizhou area of east Ordos Basin,a total of 222 samples were collected from 50 wells for a series of experiments.In this study,three pore-throat comb... With the aim of better understanding the tight gas reservoirs in the Zizhou area of east Ordos Basin,a total of 222 samples were collected from 50 wells for a series of experiments.In this study,three pore-throat combination types in sandstones were revealed and confirmed to play a controlling role in the distribution of throat size and the characteristics of gas-water relative permeability.The type-I sandstones are dominated by intercrystalline micropores connected by cluster throats,of which the distribution curves of throat size are narrow and have a strong single peak(peak ratio>30%).The pores in the type-II sandstones dominantly consist of secondary dissolution pores and intercrystalline micropores,and throats mainly occur as slice-shaped throats along cleavages between rigid grain margins and cluster throats in clay cement.The distribution curves of throat size for the type-II sandstones show a bimodal distribution with a substantial low-value region between the peaks(peak ratio<15%).Primary intergranular pores and secondary intergranular pores are mainly found in type-III samples,which are connected by various throats.The throat size distribution curves of type-III sandstones show a nearly normal distribution with low kurtosis(peak ratio<10%),and the micro-scale throat radii(>0.5μm)constitute a large proportion.From type-I to type-III sandstones,the irreducible water saturation(Swo)decreased;furthermore,the slope of the curves of Krw/Krg in two-phase saturation zone decreased and the two-phase saturation zone increased,indicating that the gas relative flow ability increased.Variations of the permeability exist in sandstones with different porethroat combination types,which indicate the type-III sandstones are better reservoirs,followed by type-II sandstones and type-I sandstones.As an important factor affecting the reservoir quality,the pore-throat combination type in sandstones is the cumulative expression of lithology and diagenetic modifications with strong heterogeneity. 展开更多
关键词 tight gas sandstone pore-throat COMBINATION type THROAT characteristic GAS-WATER relative permeability Zizhou area ORDOS Basin
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Characteristics of Tight Sandstone Reservoirs and Controls of Reservoir Quality:A Case Study of He 8 Sandstones in the Linxing Area,Eastern Ordos Basin,China 预览
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作者 GAO Xiangdong WANG Yanbin +4 位作者 LI Yong GUO Hui NI Xiaoming WU Xiang ZHAO Shihu 《地质学报:英文版》 SCIE CAS CSCD 2019年第3期637-659,共23页
Determining the process of densification and tectonic evolution of tight sandstone can help to understand the distribution of reservoirs and find relatively high-permeability areas.Based on integrated approaches of th... Determining the process of densification and tectonic evolution of tight sandstone can help to understand the distribution of reservoirs and find relatively high-permeability areas.Based on integrated approaches of thin section,scanning electron microscopy(SEM),cathode luminescence(CL),nuclear magnetic resonance(NMR),X-ray diffraction(XRD),N2 porosity and permeability,micro-resistivity imaging log(MIL)and three-dimensional seismic data analysis,this work discussed the reservoir characteristics of the member 8 of the Permian Xiashihezi Formation(He 8 sandstones)in the Linxing area of eastern Ordos Basin,determined the factors affecting reservoir quality,and revealed the formation mechanism of relatively high-permeability areas.The results show that the He 8 sandstones in the Linxing area are mainly composed of feldspathic litharenites,and are typical tight sandstones(with porosity<10%and permeability<1 mD accounting for 80.3%of the total samples).Rapid burial is the main reason for reservoir densification,which resulted in 61%loss of the primary porosity.In this process,quartz protected the original porosity by resisting compaction.The cementation(including carbonate,clay mineral and siliceous cementation)further densified the sandstone reservoirs,reducing the primary porosity with an average value of 28%.The calcite formed in the eodiagenesis occupied intergranular pores and affected the formation of the secondary pores by preventing the later fluid intrusion,and the Fe-calcite formed in the mesodiagenetic stage densified the sandstones further by filling the residual intergranular pores.The clay minerals show negative effects on reservoir quality,however,the chlorite coatings protected the original porosity by preventing the overgrowth of quartz.The dissolution of feldspars provides extensive intergranular pores which constitute the main pore type,and improves the reservoir quality.The tectonic movements play an important role in improving the reservoir quality.The current tectonic traces of the study area are m 展开更多
关键词 TIGHT gas RESERVOIR quality high-permeability RESERVOIRS Linxing area EASTERN ORDOS Basin
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鄂尔多斯盆地南缘重磁电剖面深部结构特征及地质意义 预览
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作者 邵伟 高焕平 徐斌 《世界有色金属》 2019年第9期259-259,261共2页
最近几年,随着四川盆地安岳古老地层大气田的发现,加快了对鄂尔多斯盆地前古生界的研究。文章通过对鄂尔多斯盆地南缘实施重磁电剖面深部,分析其特点,希望在石油勘探方面取得一定突破。
关键词 鄂尔多斯 重磁电剖面 地质意义
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Technical strategies for effective development and gas recovery enhancement of a large tight gas field: A case study of Sulige gas field, Ordos Basin, NW China 预览
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作者 JI Guang JIA Ailin +4 位作者 MENG Dewei GUO Zhi WANG Guoting CHENG Lihua ZHAO Xin 《石油勘探与开发:英文版》 2019年第3期629-641,共13页
Based on the analysis of influencing factors of tight gas recovery and reservoir geological characteristics, the types of remaining tight gas reserves in the Sulige gas field are summarized from the perspective of res... Based on the analysis of influencing factors of tight gas recovery and reservoir geological characteristics, the types of remaining tight gas reserves in the Sulige gas field are summarized from the perspective of residual gas genesis to estimate residual gas reserves of different types and provide corresponding technical strategies for enhancing gas recovery. The residual gas reserves in the Sulige gas field can be divided into four types: well pattern uncontrollable, horizontal well missing, imperfect perforation, blocking zone in composite sandbodies. Among them, the uncontrolled remaining gas of well pattern and blocking zone in composite sandbodies are the main body for tapping potential and improving recovery factor, and well pattern infilling adjustment is the main means. Taking into account reservoir geological characteristics, production dynamic response and economic benefit requirements, four methods for infilling vertical well pattern, i.e., quantitative geological model method, dynamic controlled range of gas well method, production interference method and economic and technical index evaluation method, as well as a design method of combined vertical well pattern with horizontal well pattern are established. Under certain economic and technological conditions, the reasonable well pattern density of enrichment zone of gas field is proved to be 4 wells per square kilometers, which can increase the recovery rate of the gas field from 32% to about 50%. Meanwhile, five matching techniques for enhancing gas recovery aimed at interlayer undeveloped residual gas have been formed, including tapping potential of old wells, technological technology optimizing of new wells, rational production system optimizing, drainage and gas producing, and reducing waste production, which could increase the recovery rate for 5% based on well pattern infilling. The research results provide effective support for the long-term stable production of 230×108 m3/a of the Sulige gas field and production growth in the Changqing gas a 展开更多
关键词 ORDOS Basin SULIGE GAS field TIGHT GAS remaining reserves well pattern INFILLING enhancing GAS recovery matching technologies
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鄂尔多斯盆地南缘长 8 储层岩石力学特征及影响因素 预览
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作者 郭培峰 邓虎成 +2 位作者 邓勇 王琨瑜 周文 《科学技术与工程》 北大核心 2019年第18期189-198,共10页
鄂尔多斯盆地南缘中生界长 8 储层是进行油气开发的重点层位。针对长 8 储层砂泥岩交互,低孔低渗的特点,对其岩心样品开展了模拟地层下的岩石力学实验;利用测井资料,计算出了动态岩石力学参数并结合实验结果进行了动静态参数拟合;在岩... 鄂尔多斯盆地南缘中生界长 8 储层是进行油气开发的重点层位。针对长 8 储层砂泥岩交互,低孔低渗的特点,对其岩心样品开展了模拟地层下的岩石力学实验;利用测井资料,计算出了动态岩石力学参数并结合实验结果进行了动静态参数拟合;在岩石力学参数剖面的基础上,对岩石力学参数空间分布的影响因素进行分析。实验结果表明:三轴条件下,岩心样品均随着围压的增大,破坏强度变大,即弹性极限显著增加;随着围压的增大,岩石的抗压强度显著增加;随着围压的增大,岩石的变形显著增大。在进行自然伽马加权的情况下拟合情况较好,因此构建了较可靠的岩石力学参数剖面。影响泊松比、杨氏模量和抗压强度空间分布的主要因素为岩性、泥质含量和深度。研究成果对鄂南地区长8 储层的压裂优化设计提供了重要的依据。 展开更多
关键词 鄂尔多斯 长8储层 岩石力学 泊松比 杨氏模量
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Factors controlling the reservoir accumulation of Triassic Chang 6 Member in Jiyuan-Wuqi area,Ordos Basin,NW China 预览
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作者 CHEN Shijia LEI Junjie +5 位作者 LIU Chun YAO Jingli LI Yong LI Shixiang SU Kaiming XIAO Zhenglu 《石油勘探与开发:英文版》 2019年第2期253-264,共12页
In the Triassic Yanchang Formation, Jiyuan-Wuqi area, Ordos Basin, the Chang 6 reservoir is contacted to the Chang 7 high-quality source rock, but the oil pools are unevenly distributed, and complex in oil and water d... In the Triassic Yanchang Formation, Jiyuan-Wuqi area, Ordos Basin, the Chang 6 reservoir is contacted to the Chang 7 high-quality source rock, but the oil pools are unevenly distributed, and complex in oil and water distribution. Through cores observation and fracture statistics, combined with comprehensive analyses of physical property, mercury injection, logging and geochemical data, and comparisons of the sandbodies scales, reservoir physical properties, argillaceous laminae and fractures between source and reservoir in the eastern and western oil-bearing areas and in the central water producing area, it is found that the hydrocarbon accumulation patterns are different in the eastern, central and western areas, and the characteristics of hydrocarbon migration under the background of double-provenance were sorted out. The study results show that the crude oil in the eastern area has different Pr/Ph and sterane distribution from that in the western area. The oil and gas primarily migrated vertically. The high-quality source rocks and favorable source-reservoir-cap combinations lay the foundation for large-scale oil and gas accumulations. Vertically, the oil and gas enrichment is controlled by the scale of sandbody and the difference of physical properties, while on the plane, it is controlled by the connectivity of sandbodies, the argillaceous laminae between source rock and reservoir, the reservoir physical property and the fractures. The sandbodies of oil-rich zones in the eastern and western areas have large thickness, low shale content, good physical properties, weak heterogeneity, few argillaceous laminae and abundant fractures, all of which are favorable for the vertical migration and accumulation of oil and gas. In contrast, in the middle area with converging provenances, the reservoirs, composed of thin sandbodies, features rapid variation in lithology and physical properties, strong heterogeneity, poor continuity of sandbodies, abundant argillaceous laminae between source rock and reservoir, and few fra 展开更多
关键词 Yanchang Formation Chang 6 MEMBER oil RESERVOIR distribution hydrocarbon ACCUMULATION difference Jiyuan-Wuqi area ORDOS Basin
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鄂尔多斯市第二次全国污染源普查工作的若干经验 预览
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作者 吕玲玲 林强 《环境与发展》 2019年第3期252-252,254共2页
全国污染源普查是重大的国情调查,是环境保护的基础性工作。鄂尔多斯市第二次全国污染源普查工作于2017年7月启动,经过一年多的努力,已经圆满完成清查基本单位名录库,并下发清查底册,现在正在进行全面入户调查工作。为保障全市污染源普... 全国污染源普查是重大的国情调查,是环境保护的基础性工作。鄂尔多斯市第二次全国污染源普查工作于2017年7月启动,经过一年多的努力,已经圆满完成清查基本单位名录库,并下发清查底册,现在正在进行全面入户调查工作。为保障全市污染源普查工作高效率、高质量地开展,鄂尔多斯市旗两级在普查工作中的不断创新,亮点纷呈。同时总结了普查工作中存在的一些问题,以及具体解决办法,为今后的环保专项工作、污染源普查工作提供宝贵经验。 展开更多
关键词 污染源普查 鄂尔多斯市 经验
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First report of TSR origin minerals filled in anhydrite dissolved pores in southeastern Ordos Basin 预览
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作者 Li-hong Liu Chun-lian Wang Xing-min Zhao 《中国地质(英文)》 2019年第2期245-247,共3页
1.Objective Yican 1 well, drilled in Southeastern Ordos Basin by Oil & Gas Survey, China Geological Survey in 2014 produced 3.7×104 m3 natural gas daily, which is the most productive well in the area by far. ... 1.Objective Yican 1 well, drilled in Southeastern Ordos Basin by Oil & Gas Survey, China Geological Survey in 2014 produced 3.7×104 m3 natural gas daily, which is the most productive well in the area by far. However, the reservoir quality is poor compared with those of Jingbian gas field in the middle of the Basin, which is mainly caused by the pores filling in karst reservoir. 展开更多
关键词 TSR ANHYDRITE dissolved pores southeastern ORDOS Basin
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鄂尔多斯市生态系统格局和质量变化及驱动力 预览 被引量:1
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作者 董天 肖洋 +3 位作者 张路 肖燚 郑华 欧阳志云 《生态学报》 CAS CSCD 北大核心 2019年第2期660-671,共12页
生态系统变化是生态问题产生的主要驱动力之一,研究生态系统格局与质量变化对于认识人类活动与生态系统关系具有重要意义。鄂尔多斯市能源资源丰富,但生态环境脆弱,2000年以来,鄂尔多斯市在大规模开发能源的同时,也在不断加强生态环境... 生态系统变化是生态问题产生的主要驱动力之一,研究生态系统格局与质量变化对于认识人类活动与生态系统关系具有重要意义。鄂尔多斯市能源资源丰富,但生态环境脆弱,2000年以来,鄂尔多斯市在大规模开发能源的同时,也在不断加强生态环境的保护,而研究鄂尔多斯市生态系统格局与质量演变过程,对认识生态脆弱区发展与保护的关系有重要价值。应用遥感数据和GIS技术,评估了鄂尔多斯市生态系统类型与格局、生态系统质量的特征,以及2000年以来的时空变化趋势,分析了导致鄂尔多斯市生态系统格局与质量变化的驱动力因素。结果表明:(1)鄂尔多斯市的草地、荒漠裸地和农田为主要生态系统类型,分别占2010年市域面积的64.46%、21.34%与5.93%。(2)鄂尔多斯市城镇、灌丛、森林面积有所增加,草地、湿地、农田、荒漠裸地面积有所下降。城镇面积增幅最大,相对变化率增加33.37%,草地面积降幅最大,相对变化率减少0.78%,变化主要集中在中部、东北部。(3)鄂尔多斯市生态系统质量整体偏低,低等级与差等级的生态系统面积比例高达98.91%。全市的生态系统质量没有明显改善,其中生态系统质量有不同程度改善的面积为15.84%,质量降低的面积比例为15.29%。(4)生态系统格局与质量变化的主要驱动力有城市扩张、农田开垦、退耕还林(草湿)、生态保护、矿山开采等,鄂尔多斯市生态系统质量与降水、退耕还草工程、道路密度、温度、GDP1、放牧因子相关性显著。 展开更多
关键词 生态系统格局 生态系统质量 驱动力 鄂尔多斯市
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鄂尔多斯浩勒报吉水源地开采地下水的环境影响分析 预览
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作者 王旭升 尹立河 +2 位作者 方坤 张俊 王晓勇 《水文地质工程地质》 CAS CSCD 北大核心 2019年第2期5-12,共8页
干旱半干旱区的地下水开发利用容易对原本脆弱的生态环境造成不利影响。内蒙古鄂尔多斯市浩勒报吉水源地属于半干旱区的地下水水源地。2009—2014年间,该水源地为满足工业供水需求开采地下水6.0×104~7.3×104m3/d,产生了负面... 干旱半干旱区的地下水开发利用容易对原本脆弱的生态环境造成不利影响。内蒙古鄂尔多斯市浩勒报吉水源地属于半干旱区的地下水水源地。2009—2014年间,该水源地为满足工业供水需求开采地下水6.0×104~7.3×104m3/d,产生了负面的生态环境后果。为核查环境变化与地下水开采的确切关系,调查分析了2004—2016年气象条件、地下水开采历程、地下水位、湖泊面积和植被指数的变化特征,建立定量指标进行了地下水开采的环境影响判别。结果表明,在2008—2014年期间,距开采区中心10 km范围的地下水位普遍下降1 m以上,奎生淖和敖各窖淖2个湖泊的面积萎缩约30%,水源地的植被指数对气候条件变化的敏感性增强。该水源地以往论证得到的可开采量偏大,应考虑生态环境约束将开采规模控制在3×104m3/d以下。 展开更多
关键词 地下水开采 湖泊 植被指数 生态需水量 鄂尔多斯
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Affecting factors and application of the stable hydrogen isotopes of alkane gases 预览
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作者 HUANG Shipeng DUAN Shufu +8 位作者 WANG Zecheng JIANG Qingchun JIANG Hua SU Wang Feng Qingfu HUANG Tongfei YUAN Miao REN Mengyi CHEN Xiaoyue 《石油勘探与开发:英文版》 2019年第3期518-530,共13页
To study the composition, affecting factors of the stable hydrogen isotopes of alkane gases and their application to identification of the natural gas origin and maturities, the chemical and isotopic compositions of 1... To study the composition, affecting factors of the stable hydrogen isotopes of alkane gases and their application to identification of the natural gas origin and maturities, the chemical and isotopic compositions of 118 gas samples of Carboniferous- Permian in the Ordos Basin, and of Triassic in the Sichuan Basin, combined with 68 gas samples from the Sinian and Cambrian reservoirs in the Sichuan Basin, and Ordovician and Siliurian reservoirs of Tarim Basin, are analyzed comprehensively. The following conclusions are obtained:(1) Natural gases in the study area and strata of the Ordos and Sichuan basins are dominated by alkane gases, and the dryness coefficients and maturities of the Carboniferous-Permian gases in the Ordos Basin are higher than the gases in the Triassic Xujiahe Formation of the Sichuan Basin, while the hydrogen isotopes of the latter ones are much enriched in 2H than the former.(2) The δ2HCH4-C1/C2+3 genetic identification diagram of natural gas was drawn, and the diagrams of hydrogen isotopic differences between the heavy alkane gases and methane vs. hydrogen isotopes of alkane gases can also be used in natural gas genetic identification.(3) The δ2HCH4-Ro formulas of coal-formed gas in different areas of the two basins are given, and the δ2HC2H6-δ2HCH4 is a new index for maturity, and the (δ2HC2H6-δ2HCH4)-Ro formula of the coal-formed gas can be used to calculate the maturity of the natural gas.(4) The stable hydrogen isotopes of alkane gases are affected by parent materials in source rocks, maturity, mixing and the aqueous medium conditions, among which the aqueous paleo-salinity is the key factor. To sum up, the hydrogen isotopes of alkane gases are affected by multiple factors, and they are significant to the identification of the origin, and maturity of natural gas, and the water environment during the deposition of source rocks. 展开更多
关键词 ALKANE GASES MATURITY hydrogen isotope gas origin aqueous salinity ORDOS BASIN Sichuan BASIN TARIM BASIN
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鄂尔多斯东缘深层煤层气井新型堵漏工艺研究 预览
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作者 邓钧耀 杨松 +4 位作者 曹振义 张毅 李世超 刘馨然 胡凯 《石油机械》 北大核心 2019年第9期37-43,共7页
鄂尔多斯盆地东缘(鄂东缘)临汾区块在深层煤层气开发过程中存在埋藏深、地层层位多、岩性构成复杂、岩石胶结性差及井壁稳定性差等不利因素,该区块刘家沟组、石千峰组与石盒子组是主要的漏失层位,易发生漏失和垮塌。针对上述问题,收集... 鄂尔多斯盆地东缘(鄂东缘)临汾区块在深层煤层气开发过程中存在埋藏深、地层层位多、岩性构成复杂、岩石胶结性差及井壁稳定性差等不利因素,该区块刘家沟组、石千峰组与石盒子组是主要的漏失层位,易发生漏失和垮塌。针对上述问题,收集整理了现场施工数据,应用Eaton法对区块进行了地层压力预测,分析了该区块地层漏失原因,对比取心数据和岩心分析结果,得出了该区块漏失机理;使用颗粒、片状及纤维等材料进行堵漏剂匹配研究,并通过堵漏模拟试验,开发出一种适用于临汾试验区块的新型复合堵漏剂;运用新型复合堵漏剂及加压堵漏施工技术进行现场试验。试验结果表明:研制的新型堵漏剂封堵宽度1~5 mm的裂缝效果显著,具有裂缝形态匹配性好、封堵范围广和封堵强度高等优点;新型加压堵漏技术施工工艺简单,劳动强度低,有效解决了静止堵漏法成功率低、操作复杂及成本高等问题。研究成果可为其他堵漏工艺或相关工程技术研究提供参考。 展开更多
关键词 堵漏工艺 鄂尔多斯 深层煤层气井 漏失成因 堵漏试验
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Imaging-Based Characterization of Perthite in the Upper Triassic Yanchang Formation Tight Sandstone of the Ordos Basin,China 预览
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作者 DU Shuheng SHI Guoxin +3 位作者 YUE Xinjian KOU Gen ZHOU Bo SHI Yongmin 《地质学报:英文版》 SCIE CAS CSCD 2019年第2期373-385,共13页
This work investigated the element distribution of perthite from the Upper Triassic Yanchang Formation tight sandstone in the Ordos Basin of northern China by field emission scanning electron microscopy(FE-SEM) and en... This work investigated the element distribution of perthite from the Upper Triassic Yanchang Formation tight sandstone in the Ordos Basin of northern China by field emission scanning electron microscopy(FE-SEM) and energy dispersive spectrometer(EDS). FE-SEM results indicate significant differences in the morphology of Na-rich feldspar when K-rich feldspar is the main component of the perthite. EDS results show that different types of perthite have clearly defined differences on different element indexes. Additionally, indexes such as average-weight-K(K-rich)/Na(Na-rich), maximumweight-K(Na-rich)/Na(Na-rich) and average-atomic-K(K-rich)/Na(Na-rich) might be the most effective ones to identify perthite types. Perthite is divided into six main types, i.e., perthite with thick parallel stripe distribution, with thin parallel stripe distribution, with lumpy stripe distribution, with dendritic stripe distribution, with encircling stripe distribution, and with mixed stripe distribution. 展开更多
关键词 PETROGRAPHY perthite element distribution EDS FE-SEM image processing Yanchang Formation Late TRIASSIC ORDOS Basin
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改革开放以来鄂尔多斯经济发展的几点启示 预览
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作者 郝二霞 《中国资源综合利用》 2019年第2期100-103,共4页
改革开放以来,鄂尔多斯从名不见经传,到渐渐进入人们的视野,直至吸引人们的眼球,发展成为一座新兴的现代化工业城市。改革开放40年来,鄂尔多斯化茧成蝶,实现了由小到大、由弱到强、由单一到多元,由贫困到小康的蜕变。
关键词 鄂尔多斯 经济 高质量发展
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A Volumetric Model for Evaluating Tight Sandstone Gas Reserves in the Permian Sulige Gas Field,Ordos Basin,Central China 预览
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作者 CUI Mingming FAN Aiping +3 位作者 WANG Zongxiu GAO Wanli LI Jinbu LI Yijun 《地质学报:英文版》 SCIE CAS CSCD 2019年第2期386-399,共14页
To accurately measure and evaluate reserves is critical for ensuring successful production of unconventional oil and gas. This work proposes a volumetric model to evaluate the tight sandstone gas reserves of the Permi... To accurately measure and evaluate reserves is critical for ensuring successful production of unconventional oil and gas. This work proposes a volumetric model to evaluate the tight sandstone gas reserves of the Permian Sulige gas field in the Ordos Basin. The reserves can be determined by four major parameters of reservoir cutoffs, net pay, gas-bearing area and compression factor Z, which are controlled by reservoir characteristics and sedimentation. Well logging, seismic analysis, core analysis and gas testing, as well as thin section identification and SEM analysis were used to analyze the pore evolution and pore-throat structure. The porosity and permeability cutoffs are determined by distribution function curve,empirical statistics and intersection plot. Net pay and gas-bearing area are determined based on the cutoffs, gas testing and sand body distribution, and the compression factor Z is obtained by gas component. The results demonstrate that the reservoir in the Sulige gas field is characterized by ultralow porosity and permeability, and the cutoffs of porosity and permeability are 5% and 0.15×10–3 μm2, respectively. The net pay and gas-bearing area are mainly affected by the sedimentary facies, sand body types and distribution. The gas component is dominated by methane which accounts for more than 90%, and the compression factor Z of H8(P2h8) and S1(P1s1) are 0.98 and 0.985, respectively. The distributary channels stacked and overlapped, forming a wide and thick sand body with good developed intergranular pores and intercrystalline pores. The upper part of channel sand with good porosity and permeability can be sweet spot for gas exploration. The complete set of calculation systems proposed for tight gas reserve calculation has proved to be effective based on application and feedback. This model provides a new concept and consideration for reserve prediction and calculation in other areas. 展开更多
关键词 tight sandstone reservoir volumetric GAS reserve PERMIAN SULIGE GAS field ORDOS Basin
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Unconventional Natural Gas Accumulations in Stacked Deposits:A Discussion of Upper Paleozoic Coal-Bearing Strata in the East Margin of the Ordos Basin,China 预览
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作者 LI Yong YANG Jianghao +3 位作者 PAN Zhejun MENG Shangzhi WANG Kai NIU Xinlei 《地质学报:英文版》 SCIE CAS CSCD 2019年第1期111-129,共19页
The Upper Paleozoic(Carboniferous to Permian)succession in the east margin of the Ordos Basin in the North China Craton has a potential to contain significant hydrocarbon resources,though attention have been mainly at... The Upper Paleozoic(Carboniferous to Permian)succession in the east margin of the Ordos Basin in the North China Craton has a potential to contain significant hydrocarbon resources,though attention have been mainly attracted for its successful development of coalbed methane(CBM).To improve the previous resource estimates and evaluate the hydrocarbon play possibilities,this study incorporated new discoveries of hydrocarbon units and their stratigraphic relation with source rocks,hydrocarbon migration and trapping configurations.Continuous hydrocarbon accumulation units were identified within the Upper Paleozoic,including the Taiyuan,Shanxi and Xiashihezi formations with great tight gas potential,and the Taiyuan and Shanxi formations also containing shale gas and CBM.Different strata combinations are identified with coal deposition and favour for continuous gas accumulations,including the tidal flat,deltaic and fluvial systems distributed in most of the study areas.Methane was not only generated from the thick coal seams in the Taiyuan and Shanxi formations,but also from shale and dark mudstones.The coal,shale and tight sandstones are proved of remarkable gas content and hydrocarbon indications,and the gas saturation of tight sandstones decreases upward.The stacked deposit combinations vary isochronally in different areas,while the coal seams were developed stably showing good gas sources.Two key stages control the hydrocarbon enrichment,the continuous subsidence from coal forming to Late Triassic and the anomalous paleo-geothermal event happened in Early Cretaceous,as indicated by the fluid inclusions evidence.Extensive areas show good hydrocarbon development potential presently,and more works should be focused on the evaluation and selection of good reservoir combinations. 展开更多
关键词 coal measure GAS transitional SHALE GAS TIGHT sand GAS three gases eastern ORDOS Basin
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鄂尔多斯市生态资产和生态系统生产总值评估 预览
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作者 董天 张路 +3 位作者 肖燚 郑华 黄斌斌 欧阳志云 《生态学报》 CAS CSCD 北大核心 2019年第9期3062-3074,共13页
鄂尔多斯市属于生态环境脆弱区域,在大规模开发丰富能源资源的同时,生态环境保护也在不断加强,评估鄂尔多斯生态资产价值,是认识鄂尔多斯生态价值的关键。构建了生态资产、生态系统生产总值评估的理论框架和评估方法指标体系,基于鄂尔... 鄂尔多斯市属于生态环境脆弱区域,在大规模开发丰富能源资源的同时,生态环境保护也在不断加强,评估鄂尔多斯生态资产价值,是认识鄂尔多斯生态价值的关键。构建了生态资产、生态系统生产总值评估的理论框架和评估方法指标体系,基于鄂尔多斯市生态系统格局、质量数据,评估了鄂尔多斯市生态资产、生态系统生产总值。评估结果表明:(1)2015年,鄂尔多斯市生态系统质量等级以差、低、中为主,分别占比:50.74%、31.78%、6.17%,差、低、中等级的生态系统面积之和占比88.69%。(2)2015年,鄂尔多斯市生态资产指数为1998.19,其中生态资产指数最高的是鄂托克旗,生态资产指数为392.26,占比19.63%,其次是杭锦旗,生态资产指数为307.48,占比15.39%。2010—2015年,鄂尔多斯市生态资产指数总体呈上升趋势。其中,上升最为剧烈的区域是鄂托克前旗,生态资产指数上升92.72,占比19.38%,其次为乌审旗,生态资产指数上升91.04,占比19.03%。(3)2015年,鄂尔多斯市生态系统生产总值(GEP)为2481.71亿元,GEP约为2015年GDP总值的58.72%,鄂尔多斯市单位面积GEP为0.03亿元/km~2,人均GEP为12.14万元/人。2010—2015年,鄂尔多斯市生态系统生产总值从1975.50亿元增加至2481.71亿元,增加量占2010年GEP价值的比例为25.62%,上升趋势明显。(4)2010—2015年,鄂尔多斯市生态系统质量变化原因主要是GDP增长(P<0.05),表明经济持续发展降低了当地人口对草地、森林的经济的依赖性。鄂尔多斯市生态资产指数上升的主要驱动因素气候因素降水的增加(P<0.001)、人口密度的下降(P<0.01),以及GDP的增加(P<0.01)。鄂尔多斯间生态系统生产总值变化的主要驱动因素,包括城市扩张、农田开垦、退耕还林、草、湿、生态恢复、矿山开采、生态退化等。本研究根据鄂尔多斯市生态系统质量、生态资产、生态系统生产总值面临的问题,提出了生态保� 展开更多
关键词 生态系统质量 生态资产 生态系统生产总值 驱动力 鄂尔多斯
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