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煤与瓦斯突出预测的Bayes-逐步判别分析模型及应用 预览
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作者 李长兴 关金锋 +1 位作者 李回贵 辛程鹏 《中国矿业》 北大核心 2020年第2期117-123,共7页
为提高煤与瓦斯突出预测的准确性,基于判别分析理论,通过逐步判别法筛选出瓦斯放散初速度、瓦斯压力、软分层厚度3个煤与瓦斯突出敏感指标作为突出判别因子,将煤与瓦斯突出危险性分为4个等级作为Bayes判别分析的4个正态总体,建立了煤与... 为提高煤与瓦斯突出预测的准确性,基于判别分析理论,通过逐步判别法筛选出瓦斯放散初速度、瓦斯压力、软分层厚度3个煤与瓦斯突出敏感指标作为突出判别因子,将煤与瓦斯突出危险性分为4个等级作为Bayes判别分析的4个正态总体,建立了煤与瓦斯突出预测的Bayes-逐步判别分析模型。利用该判别模型对20个煤与瓦斯突出实例进行训练学习得出相应的判别函数,用回代估计的方法进行逐一验证,其误判率为0。将建立的判别模型应用于8个突出实例进行判别预测,其结果与实际情况完全吻合。 展开更多
关键词 瓦斯 煤与瓦斯突出 Bayes-逐步判别分析模型 预测
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220 t燃煤锅炉脱硝超净排放调试问题分析与改造实践 预览
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作者 陈健 黄志伟 吴铭 《冶金动力》 2020年第1期38-41,46,共5页
220t/h掺烧煤气燃煤锅炉SCR脱销超净排放改造后,通过运行调试问题分析与改造实践,达到脱硝超净排放最佳指标控制,同时解决因超净排放改造引起的热解炉堵塞问题。
关键词 燃煤锅炉 SCR脱硝超净排放 煤气 热解炉
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Characteristics of a coherent jet enshrouded in a supersonic fuel gas 预览
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作者 Fei Zhao Rong Zhu Wen-rui Wang 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2020年第2期173-180,共8页
Based on a current coherent jet,this study proposes a supersonic combustion(SC)coherent jet in which the main oxygen jet is surrounded by a supersonic fuel gas.The characteristics of the proposed coherent jet are anal... Based on a current coherent jet,this study proposes a supersonic combustion(SC)coherent jet in which the main oxygen jet is surrounded by a supersonic fuel gas.The characteristics of the proposed coherent jet are analyzed using experimental methods and numerical simulations in the high-temperature environment of electric arc furnace(EAF)steelmaking.The SC coherent jet achieved stable combustion in the EAF steelmaking environment.The simulated combustion temperature of the supersonic shrouding methane gas was 2930 K,slightly below the theoretical combustion temperature of methane–oxygen gas.The high speed and temperature of the supersonic flame effectively weakened the interaction between the main oxygen jet and the external ambient gas,inhibiting the radial expansion of the main oxygen jet and maintaining its high speed and low turbulence over a long distance.These features improved the impact capacity of the coherent jet and strengthened the stirring intensity in the EAF bath. 展开更多
关键词 EAF steelmaking coherent jet supersonic shrouding fuel gas supersonic combustion field characteristics
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分析综采工作面瓦斯治理技术 预览
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作者 康文巍 《当代化工研究》 2020年第1期62-63,共2页
随着我国科学技术水平的不断提升,传统的机械化煤矿采掘技术在持续更新,现代化的采煤技术也不断应用到实际的煤矿工作中去,煤矿的生产能力得到巨大提升,工程进度也随之加快,我国煤矿开采水平取得了一定的成绩,但是在煤矿作业中也遇到了... 随着我国科学技术水平的不断提升,传统的机械化煤矿采掘技术在持续更新,现代化的采煤技术也不断应用到实际的煤矿工作中去,煤矿的生产能力得到巨大提升,工程进度也随之加快,我国煤矿开采水平取得了一定的成绩,但是在煤矿作业中也遇到了一些问题,其中最严重的一项问题就是瓦斯问题,煤矿作业下瓦斯的灾害主要是爆炸、突出以及窒息三种形式,不但会对煤矿开采的进度产生影响,更甚的是,会严重威胁工作人员的生命安全,带来极坏的社会影响。本文通过分析瓦斯在综采工作面涌出时的特征,谈论并探究了综采工作面瓦斯治理技术常见的几种措施,希望能为保障煤矿采掘更加安全提供参考。 展开更多
关键词 综采工作面 瓦斯 治理技术 分析
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市政污泥与生活垃圾掺烧的重金属排放特征与风险 预览
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作者 庄僖 许榕发 +2 位作者 罗伟铿 蔡凤珊 李馥琪 《生态环境学报》 CSCD 北大核心 2020年第1期199-206,共8页
中国市政污泥年产生量逐年攀升,低热值、高含水率和污染物富集等特征为市政污泥的处理处置带来难度,未能科学处置的市政污泥将带来生态风险,因此高效科学的污泥处理处置手段是打好污染攻防战的重要环节。与生活垃圾协同焚烧是实现市政... 中国市政污泥年产生量逐年攀升,低热值、高含水率和污染物富集等特征为市政污泥的处理处置带来难度,未能科学处置的市政污泥将带来生态风险,因此高效科学的污泥处理处置手段是打好污染攻防战的重要环节。与生活垃圾协同焚烧是实现市政污泥减量化和提高污泥综合利用率的有效处理方法。为探讨市政污泥与生活垃圾协同焚烧后的重金属排放特征与模式,于2016年5月(湿季)与2017年1月(干季)采集广东省某生活垃圾焚烧设施在掺烧0%、5%、10%和15%市政污泥后排放的烟气、飞灰和炉渣样品,并采用原子吸收分光光度法和原子荧光光度法系统分析各焚烧组的Cu、Pb、Cd、Ni、As和Cr的排放特征。结果表明,在干湿两季,各污泥掺烧比例下烟气中Cu、Pb、Cd、Ni、As和Cr的质量浓度分别为0.0016、0.0099、0.0008、0.0025、0.0022和0.1253 mg·m^−3,未超过《生活垃圾焚烧污染控制标准》(GB18485-2014)限值,能够达标排放。市政污泥掺烧可能引起烟气中部分重金属质量浓度下降,而对飞灰与炉渣中重金属质量分数的影响较小,可按照生活垃圾焚烧后固体废物的处理方法统一处理。Cd、Cr和Cu等重金属排放分布特征存在明显的季节性差异,其中干季主要分布于飞灰与炉渣(大于98%)中,在湿季则主要分布于炉渣(大于70%)中,重金属分布特征可能受焚烧物料的重金属含量与季节性焚烧条件的影响。综上所述,在低于15%掺烧比例条件下,市政污泥与生活垃圾协同焚烧对重金属排放浓度不产生显著影响,与生活垃圾协同焚烧是市政污泥安全处理处置的重要手段。 展开更多
关键词 市政污泥 协同焚烧 重金属排放 烟气 飞灰 炉渣
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煤矿综采工作面高抽巷通风技术研究 预览
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作者 张毅 《煤矿现代化》 2020年第1期9-11,共3页
针对U型通风方式存在的回风隅角瓦斯浓度偏高等问题,本文首先对高抽巷的瓦斯抽采原理进行了分析,然后对高抽巷与回风巷的垂直距离和水平距离等参数进行了公式计算,得出高抽巷的最佳层位参数,最后利用FLUENT软件模拟分析了高抽巷对U型通... 针对U型通风方式存在的回风隅角瓦斯浓度偏高等问题,本文首先对高抽巷的瓦斯抽采原理进行了分析,然后对高抽巷与回风巷的垂直距离和水平距离等参数进行了公式计算,得出高抽巷的最佳层位参数,最后利用FLUENT软件模拟分析了高抽巷对U型通风方式下工作面巷道和采空区的瓦斯浓度分布的影响,结果表明增加高抽巷后可有效避免回风隅角瓦斯聚集,保障生产安全性和工作面瓦斯浓度控制的稳定性。 展开更多
关键词 U型通风 高抽巷 瓦斯 FLUENT
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煤矿瓦斯监测技术的专利地图研究 预览
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作者 聂珍 张婧 《技术与创新管理》 2020年第1期51-55,共5页
运用专利地图对煤矿瓦斯检测技术进行了研究。结果表明,中国煤矿瓦斯检测技术正处于发展期,专利申请量呈现出快速增长的趋势,该领域专利以发明和实用新型专利为主,创新主体以煤炭行业高校为主;新技术特征较强,仍有较大发展空间。建议抓... 运用专利地图对煤矿瓦斯检测技术进行了研究。结果表明,中国煤矿瓦斯检测技术正处于发展期,专利申请量呈现出快速增长的趋势,该领域专利以发明和实用新型专利为主,创新主体以煤炭行业高校为主;新技术特征较强,仍有较大发展空间。建议抓住煤炭产业转型升级机遇,强化煤炭企业技术创新主体地位和知识产权意识,加大研发投入,在提高专利数量的同时提升质量;加强原始创新和集成创新,突出技术微型化、智能化和网络化发展趋势以及集成化、多功能化、微功耗无源化、高精度及高可靠性等新特点。 展开更多
关键词 专利地图 瓦斯 检测技术 煤炭产业 创新驱动
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Analysis on nonlinear effect of unsteady percolation in the inhomogeneous shale gas reservoir 预览
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作者 Xinchun SHANG Jiaxuan LIU +1 位作者 Xuhua GAO Weiyao ZHU 《应用数学和力学:英文版》 SCIE EI CSCD 2020年第1期105-122,共18页
The nonlinear effects of unsteady multi-scale shale gas percolation,such as desorption,slippage,diffusion,pressure-dependent viscosity,and compressibility,are investigated by numerical simulation.A new general mathema... The nonlinear effects of unsteady multi-scale shale gas percolation,such as desorption,slippage,diffusion,pressure-dependent viscosity,and compressibility,are investigated by numerical simulation.A new general mathematical model of the problem is built,in which the Gaussian distribution is used to describe the inhomogeneous intrinsic permeability.Based on the Boltzmann transformation,an efficient semi-analytical method is proposed.The problem is then converted into a nonlinear equation in an integral form for the pressure field,and a related explicit iteration scheme is constructed by numerical discretization.The validation examples show that the proposed method has good convergence,and the simulation results also agree well with the results obtained from both numerical and actual data of two vertical fractured test wells in the literature.Desorption,slippage,and diffusion have significant influence on shale gas flows.The accuracy of the usual technique that the product of viscosity and compressibility is approximated as its value at the average formation pressure is examined. 展开更多
关键词 shale gas nonlinear effect inhomogeneous permeability unsteady percolation mathematical model semi-analytical method
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浅谈高河煤矿高抽巷的布置及瓦斯抽放效果 预览
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作者 李欣 《煤矿现代化》 2019年第6期166-167,170共3页
本文针对高河煤矿W1309工作面3号煤层存在的高瓦斯问题,提出“Y+高抽巷”的瓦斯治理模式。并以W1309高抽巷Ⅱ段为例,提出了瓦斯抽放设计,并对不同回采阶段高抽巷的瓦斯抽采效果、抽采特征进行分析。结果表明,W1309高抽巷Ⅱ段对回采期间... 本文针对高河煤矿W1309工作面3号煤层存在的高瓦斯问题,提出“Y+高抽巷”的瓦斯治理模式。并以W1309高抽巷Ⅱ段为例,提出了瓦斯抽放设计,并对不同回采阶段高抽巷的瓦斯抽采效果、抽采特征进行分析。结果表明,W1309高抽巷Ⅱ段对回采期间的瓦斯抽采效果明显,有效控制了工作面回采期间的瓦斯浓度。 展开更多
关键词 高河煤矿 瓦斯 高抽巷 瓦斯抽采
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Progress in Global Gas Hydrate Development and Production as a New Energy Resource 预览
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作者 LIU Liping SUN Zhilei +10 位作者 ZHANG Lei WU Nengyou Yichao Qin JIANG Zuzhou GENG Wei CAO Hong ZHANG Xilin ZHAI Bin XU Cuiling SHEN Zhicong JIA Yonggang 《地质学报:英文版》 SCIE CAS CSCD 2019年第3期731-755,共25页
Natural gas hydrates have been hailed as a new and promising unconventional alternative energy,especially as fossil fuels approach depletion,energy consumption soars,and fossil fuel prices rise,owing to their extensiv... Natural gas hydrates have been hailed as a new and promising unconventional alternative energy,especially as fossil fuels approach depletion,energy consumption soars,and fossil fuel prices rise,owing to their extensive distribution,abundance,and high fuel efficiency.Gas hydrate reservoirs are similar to a storage cupboard in the global carbon cycle,containing most of the world's methane and accounting for a third of Earth's mobile organic carbon.We investigated gas hydrate stability zone burial depths from the viewpoint of conditions associated with stable existence of gas hydrates,such as temperature,pressure,and heat flow,based on related data collected by the global drilling programs.Hydrate-related areas are estimated using various biological,geochemical and geophysical tools.Based on a series of previous investigations,we cover the history and status of gas hydrate exploration in the USA,Japan,South Korea,India,Germany,the polar areas,and China.Then,we review the current techniques for hydrate exploration in a global scale.Additionally,we briefly review existing techniques for recovering methane from gas hydrates,including thermal stimulation,depressurization,chemical injection,and CH4-CO2 exchange,as well as corresponding global field trials in Russia,Japan,United States,Canada and China.In particular,unlike diagenetic gas hydrates in coarse sandy sediments in Japan and gravel sediments in the United States and Canada,most gas hydrates in the northem South China Sea are non-diagenetic and exist in fine-grained sediments with a vein-like morphology.Therefore,especially in terms of the offshore production test in gas hydrate reservoirs in the Shenhu area in the north slope of the South China Sea,Chinese scientists have proposed two unprecedented techniques that have been verified during the field trials:solid fluidization and formation fluid extraction.Herein,we introduce the two production techniques,as well as the so-called"fbur-in-one"environmental monitoring system employed during the Shenhu production te 展开更多
关键词 natural GAS HYDRATE GAS RECOVERY PRODUCTION technique SHALLOW GAS HYDRATE environmental monitoring
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Simulation study of the void space gas effect on slope instability triggered by an earthquake
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作者 ZHOU Zhou WANG Xiao-qun +2 位作者 WEI Yu-feng SHEN Jun-hui SHEN Man 《山地科学学报:英文版》 SCIE CSCD 2019年第6期1300-1325,共26页
This study aims at exploring the void space gas effect of earthquake-triggered slope instability and providing a new method for studying the formation mechanism of earthquake-triggered landslides. We analysed the basi... This study aims at exploring the void space gas effect of earthquake-triggered slope instability and providing a new method for studying the formation mechanism of earthquake-triggered landslides. We analysed the basic characteristics, kinematic characteristics, initiation mechanisms and physical mechanical parameters of the Daguangbao landslide, generalized a landslide prototype, and established a geological model and performed simulation tests. Based on the seismic wave propagation theory of rock-soil mass, rock fracture mechanics and the effective stress principle, we found that the void space gas effect is due to the occurrence of excess void space gas pressure when the dynamic response of seismic loads impacts the void space gas in weak intercalated layers of the slope. The excess void space gas pressure generated by the vibration(earthquake) damages the rock mass around the void space with a certain regularity. The model test results show that the effective shear strength of the rock mass can be reduced by 4.4% to 21.6% due to the void space gas effect. 展开更多
关键词 EARTHQUAKE landslide Slope weak INTERCALATED layer VOID SPACE GAS EFFECT Void-gas dynamic response Excess VOID SPACE GAS pressure Gas-rock interaction mechanism
A Quantitative Evaluation of Shale Gas Content in Different Occurrence States of the Longmaxi Formation: A New Insight from Well JY-A in the Fuling Shale Gas Field,Sichuan Basin 预览
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作者 TANG Ling SONG Yan +8 位作者 LI Qianwen PANG Xiongqi JIANG Zhenxue LI Zhuo TANG Xianglu YU Hailong SUN Yue FAN Shichao ZHU Lin 《地质学报:英文版》 SCIE CAS CSCD 2019年第2期400-419,共20页
Comprehensive quantitative evaluation of shale gas content and the controlling factors in different occurrence states is of great significance for accurately assessing gas-bearing capacity and providing effective well... Comprehensive quantitative evaluation of shale gas content and the controlling factors in different occurrence states is of great significance for accurately assessing gas-bearing capacity and providing effective well-production strategies. A total of 122 core samples from well JY-A in the Fuling shale gas field were studied to reveal the characteristics of S1 l shale,15 of which were selected to further predict the shale gas content in different occurrence states, which are dependent on geological factors in the thermal evolution process. Geological parameters were researched by a number of laboratory programs, and the factors influential in controlling shale gas content were extracted by both PCA and GRA methods and prediction models were confirmed by the BE method using SPSS software. Results reveal that the adsorbed gas content is mainly controlled by TOC, Ro, SSA, PD and pyrite content, and the free gas content is mainly controlled by S2, quartz content, gas saturation and formation pressure for S1 l in well JY-A. Three methods, including the on-site gas desorption method, the empirical formula method, and the multiple regression analysis method were used in combination to evaluate the shale gas capacity of well JY-A, all of which show that the overall shale gas content of well JY-A is in the range of 2.0–5.0 m3/t and that the free gas ratio is about 50%, lower than that of well JY-1. Cause analysis further confirms the tectonics and preservation conditions of S1 l in the geological processes, especially the influence of eastern boundary faults on well JY-A, as the fundamental reasons for the differences in shale gas enrichment in the Jiaoshiba area. 展开更多
关键词 SHALE GAS CONTENT ON-SITE GAS desorption multiple regression analysis controlling factors Longmaxi SHALES Fuling SHALE GAS field Jiaoshiba area
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“Exploring petroleum inside source kitchen”: Connotation and prospects of source rock oil and gas 预览
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作者 YANG Zhi ZOU Caineng 《石油勘探与开发:英文版》 2019年第1期181-193,共13页
Based on the transitional background of the global energy structure, exploration and development of unconventional oil and gas, and investigation of key basins, the unconventional oil and gas resources are divided int... Based on the transitional background of the global energy structure, exploration and development of unconventional oil and gas, and investigation of key basins, the unconventional oil and gas resources are divided into three types: source rock oil and gas, tight oil and gas, and retention and accumulated oil and gas. Source rock oil and gas resources are the global strategic supplies of oil and gas, the key resource components in the second 150-year life cycle of the future petroleum industry, and the primary targets for “exploring petroleum inside source kitchen”. The geological connotation of source rock oil and gas was proposed, and the models of source rock oil and gas generation, expulsion and accumulation were built, and five source rock oil and gas generation sections were identified, which may determine the actual resource potential under available technical conditions. The formation mechanism of the “sweet sections” was investigated, that is, shale oil is mainly accumulated in the shale section that is close to the oil generation section and has higher porosity and permeability, while the “sweet sections” of coal-bed methane(CBM) and shale gas have self-contained source and reservoir and they are absorbed in coal seams or retained in the organic-rich black shale section, so evaluation and selection of good 'sweet areas(sections)' is the key to “exploring petroleum inside source kitchen”. Source rock oil and gas resources have a great potential and will experience a substantial growth for over ten world-class large “coexistence basins” of conventional-unconventional oil and gas in the future following North America, and also will be the primary contributor to oil stable development and the growth point of natural gas production in China, with expected contribution of 15% and 30% to oil and gas, respectively, in 2030. Challenges in source rock oil and gas development should be paid more attention to, theoretical innovation is strongly recommended, and a development pilot zone can be est 展开更多
关键词 SOURCE rock OIL and GAS SHALE GAS SHALE OIL coal-bed methane SWEET section SWEET area SOURCE control theory man-made OIL and GAS reservoir UNCONVENTIONAL OIL and GAS revolution large“coexistence basins”of conventional-unconventional OIL and GAS
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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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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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Natural gas consumption forecasting model based on coal-to-gas project in China
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作者 Zhiqiang Wang Yichen Li +1 位作者 Zhanjun Feng Kai Wen 《全球能源互联网:英文版》 2019年第5期430-436,共7页
Natural gas is widely used because it is environmentally friendly,particularly in reducing carbon emission and improving the Air Quality Index(AQI)around densely populated cities.China has initiated a coal-to-gas proj... Natural gas is widely used because it is environmentally friendly,particularly in reducing carbon emission and improving the Air Quality Index(AQI)around densely populated cities.China has initiated a coal-to-gas project(CGP)to improve the air quality in northern China.As a subcompany of China National Petroleum Corporation,PetroChina Natural Gas Marketing North Company has been focusing on natural gas resource allocation while considering numerous issues such as ensuring the bottom line of livelihood requirements in winter and the performance of economic indicators for an entire calendar year in the northern part of China.Therefore,the accurate prediction of natural gas consumption is important to PetroChina Natural Gas Marketing North Company.It has become a challenge to forecast natural gas consumption because the natural gas market has changed considerably because of the CGP.Natural gas consumption cannot be forecasted using conventional models.This study analyzes the characteristics of the CGP based on the data obtained from rural individual users and company users.Based on the analysis,the gas consumption in winter is predicted using two different forecasting approaches.The methods presented in this paper provide a basis for formulating effective measures for natural gas scheduling in the northern part of China. 展开更多
关键词 Natural GAS COAL to GAS PROJECT CGP GAS CONSUMPTION forecast!ng End USER CONSUMPTION characteristics.
Current Situation and Prospects of the Development of China's Natural Gas Industry 预览
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作者 Gao Jie Zhao Zhongde +1 位作者 Zuo Yumei Liu Dingzhi 《中国油气:英文版》 CAS 2019年第3期35-42,共8页
In 2018,China's natural gas market reached a new level of development,with apparent consumption of 280.3 billion m3,up by 18.1%over the same period in the previous year.Domestic production grew steadily,reaching 1... In 2018,China's natural gas market reached a new level of development,with apparent consumption of 280.3 billion m3,up by 18.1%over the same period in the previous year.Domestic production grew steadily,reaching 157 billion m3,up by 7.2%over the same period in the previous year.Natural gas imports grew rapidly,with imports of pipeline gas and LNG totalling 124.2 billion m3.In terms of trade types,imports of LNG continue to exceed those of pipeline gas.In 2019,there has been downward pressure on the macro economy,and the development of the main gas sector has slowed down.Driven by environmental protection policies,the natural gas market continues to maintain rapid growth.However,it is difficult for the levels of increment and growth to reach those of the previous two years,and the growth rate of market demand is predicted to reach 10.7%. 展开更多
关键词 China NATURAL GAS OUTPUT CONSUMPTION PRICE Coal-intogas Urban GAS NATURAL GAS power generation Industry
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Technical and Economic Aspects and Experience from 6 Years of Operating the Technology Using the Waste Heat from the Exhaust Gases of Heat Sources and 3 Years of Operating a Heating Plant in an Autonomous, Island Regime 预览
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作者 Imrich Discantiny 《地质资源与工程:英文版》 2019年第2期39-44,共6页
This article is focused on technical and economic evaluation of more than 6-years experiences of operating the Waste Heat Recovery technology—the manner and system of flue gas processing generated in the combustion p... This article is focused on technical and economic evaluation of more than 6-years experiences of operating the Waste Heat Recovery technology—the manner and system of flue gas processing generated in the combustion process in heat & power plants, cogeneration units, etc., which burn the gaseous fuel, primarily natural gas, or methane, biogas, geothermal gas, or other gaseous mixtures containing hydrogen. The solution proposes a more effective and non-traditional use of gaseous fuel for heating, the flue gases of which are processed in order to extract additional utilisable heat, with potential elimination of CO2 from them. Deploying of the heating plant in an island regime (OFF-GRID) enables definition of the benefits brought by the 3 years of operational experience and presents visions for the future offering the possibility to utilise the support energy services at the municipal as well as regional level. 展开更多
关键词 NATURAL GAS (NG) liquefied NATURAL GAS (LNG) liquefied propane GAS (LPG) combined HEAT & power (CHP) renewable energy sources (RES) waste HEAT recovery (WHR) international GAS union (IGU)
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Determination of the maximum allowable gas pressure for an underground gas storage salt cavern--A case study of Jintan,China 预览
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作者 Tongtao Wang Jianjun Li +3 位作者 Gang Jing Qingqing Zhang Chunhe Yang J.J.K.Daemen 《岩石力学与岩土工程学报:英文版》 CSCD 2019年第2期251-262,共12页
Increasing the allowable gas pressure of underground gas storage(UGS)is one of the most effective methods to increase its working gas capacity.In this context,hydraulic fracturing tests are implemented on the target f... Increasing the allowable gas pressure of underground gas storage(UGS)is one of the most effective methods to increase its working gas capacity.In this context,hydraulic fracturing tests are implemented on the target formation for the UGS construction of Jintan salt caverns,China,in order to obtain the minimum principal in situ stress and the fracture breakdown pressure.Based on the test results,the maximum allowable gas pressure of the Jintan UGS salt cavern is calibrated.To determine the maximum allowable gas pressure,KING-1 and KING-2 caverns are used as examples.A three-dimensional(3D)geomechanical model is established based on the sonar data of the two caverns with respect to the features of the target formation.New criteria for evaluating gas penetration failure and gas seepage are proposed.Results show that the maximum allowable gas pressure of the Jintan UGS salt cavern can be increased from 17 MPa to 18 MPa(i.e.a gradient of about 18 k Pa/m at the casing shoe depth).Based on numerical results,a field test with increasing maximum gas pressure to 18 MPa has been carried out in KING-1 cavern.Microseismic monitoring has been conducted during the test to evaluate the safety of the rock mass around the cavern.Field monitoring data show that KING-1 cavern is safe globally when the maximum gas pressure is increased from 17 MPa to 18 MPa.This shows that the geomechanical model and criteria proposed in this context for evaluating the maximum allowable gas pressure are reliable. 展开更多
关键词 Underground GAS storage(UGS)salt CAVERN In SITU stress testing MAXIMUM GAS pressure GAS PENETRATION failure Microseismic monitoring
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青岛市燃气用气量预测方法研究 预览
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作者 王钦 金意 《城市燃气》 2019年第8期16-21,共6页
通过人均综合用气指标建立青岛用气总量预测方程,以市内四区为例,详细阐述了居民生活用气、商业用气和工业用气的预测方法,为燃气规划及企业计划阶段的用气预测提供依据.
关键词 燃气 用气指标 用气量预测
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