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天然气水合物的形成影响因素与浆体输送研究 预览 被引量:1
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作者 姜雪梅 魏涛 刘鑫 《石油化工高等学校学报》 CAS 2019年第1期79-85,共7页
天然气深水集输管道内极易生成水合物,研究其形成影响因素对管道的安全运行具有重要意义。采用PVTsim建立了数值模型,并基于5种实验数据对模型进行了可靠性分析。利用该模型,模拟在不同工况下天然气形成水合物的边界条件,基于实验和OLG... 天然气深水集输管道内极易生成水合物,研究其形成影响因素对管道的安全运行具有重要意义。采用PVTsim建立了数值模型,并基于5种实验数据对模型进行了可靠性分析。利用该模型,模拟在不同工况下天然气形成水合物的边界条件,基于实验和OLGA模拟数据得到了水合物体积分数与介质摩尔分数的定量关系。研究表明,相比压力,水合物的形成受温度的影响更大。在天然气中,加入乙烷、丙烷、二氧化碳、硫化氢,均会使水合物形成范围扩大,而加入氮气,会使水合物形成范围缩小。随着水中盐度的增大,水合物生成范围缩小。外界温度、压力对水合物生成量的影响较小,几乎可忽略不计。基于水合物浆输送技术的研究成果,得到了保障HCFC-141b型和THF型水合物浆流动安全的临界甲烷摩尔分数。 展开更多
关键词 水合物 水合物浆体 形成条件 生成量 影响因素
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A sand-production control system for gas production from clayey silt hydrate reservoirs 预览
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作者 Yan-long Li Neng-you Wu +4 位作者 Fu-long Ning Gao-wei Hu Chang-ling Liu Chang-yin Dong Jing-an Lu 《中国地质(英文)》 2019年第2期121-132,共12页
Sand production is a crucial problem during the process of extracting natural gas from hydrate reservoirs. To deal with sand-production problems systematically, a sand-production control system (SCS) is first proposed... Sand production is a crucial problem during the process of extracting natural gas from hydrate reservoirs. To deal with sand-production problems systematically, a sand-production control system (SCS) is first proposed in this paper, specialized for pore-distributed clayey silt hydrate reservoirs. Secondly, a nodal system analysis method (NSAM) is applied to analyze the sand migration process during hydrate exploitation. The SCS is divided into three sub-systems, according to different sand migration mechanisms, and three key scientific problems and advances in SCS research in China Geological Survey are reviewed and analyzed. The maximum formation sanding rate, proper sand-control gravel size, and borehole blockage risk position were provided for clayey hydrate exploitation wells based on the SCS analysis. The SCS sub-systems are closely connected via bilateral coupling, and coordination of the subsystems is the basis of maintaining formation stability and prolonging the gas production cycle. Therefore, contradictory mitigation measures between sand production and operational systems should be considered preferentially. Some novel and efficient hydrate exploitation methods are needed to completely solve the contradictions caused by sand production. 展开更多
关键词 Natural gas HYDRATE HYDRATE EXPLOITATION Sand-production management SAND PRODUCTION SAND control NODAL system analysis
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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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Effect of hydrophilic silica nanoparticles on hydrate formation: Insight from the experimental study 预览
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作者 Ren Wang Tianle Liu +9 位作者 Fulong Ning Wenjia Ou Ling Zhang Zhen Wang Li Peng Jiaxin Sun Zhichao Liu Tianshu Li Huicui Sun Guosheng Jiang 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第3期90-100,共11页
Invasion of drilling fluid into natural gas hydrate deposits during drilling might damage the reservoir, induce hydrate dissociation and then cause wellbore instability and distortion of the data from well log-ging. A... Invasion of drilling fluid into natural gas hydrate deposits during drilling might damage the reservoir, induce hydrate dissociation and then cause wellbore instability and distortion of the data from well log-ging. Adding nanoparticles into drilling fluid is an effective method in reducing the invasion of drilling fluid and enhancing borehole stability. However, the addition of nanoparticles might also introduce hy-drate formation risk in borehole because they can act as the “seeds” for hydrate nucleation. This paper presents an experimental study of the effect of hydrophilic silica nanoparticle on gas hydrate formation in a dynamic methane/liquid-water system. In the experiment, the ultrapure water with and without 1.0 wt%–6.0 wt% concentrations of silica nanoparticles, grain sizes of 20 and 50 nm, were pressurized by methane gas under varied conditions of temperature and pressure. The induction time, the gas consump-tion, and the average rate of gas consumption in the system were measured and compared to those in ultrapure water. The results show that a concentration of 4.0 wt% hydrophilic SiO2 particles with a grain size of 50 nm has a relatively strong inhibition effect on hydrate formation when the initial experimental condition is 5.0℃ and 5.0 MPa. Compared to ultrapure water, the hydrophilic nano-SiO2 fluid increases the induction time for hydrate formation by 194% and decreases the amount and average rate of hydrate formation by 10% and 17%, respectively. This inhibition effect may be attributed to the hydrophilicity, amount and aggregation of silica nanoparticle according to the results of water activity and zeta po-tential measurements. Our work also elucidates hydrophilic, instead of hydrophobic, nanoparticles can be added to the drilling fluid to maintain wellbore stability and to protect the hydrate reservoir from drilling mud damage, because they exhibit certain degree of hydrate inhibition which can reduce the risk of hy-drate reformation and aggregation during gas hydrate or deep water dr 展开更多
关键词 HYDRATE DRILLING fluid HYDROPHILIC NANO-SIO2 Concentration GRAIN size HYDRATE formation Inhibition mechanism
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Patterns of gas hydrate accumulation in mass transport deposits related to canyon activity:Example from Shenhu drilling area in the South China Sea 预览
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作者 Chao Fu Shengli Li +4 位作者 Xinghe Yu Jinqiang Liang Zenggui Kuang Yulin He Lina Jin 《海洋学报:英文版》 SCIE CAS CSCD 2019年第5期118-128,共11页
Since 2017,a plenty of gas hydrates have been drilled in a new area of Shenhu,and good heterogeneity has been found throughout the spatial distribution of the reservoir.After distinguishing different sedimentary seque... Since 2017,a plenty of gas hydrates have been drilled in a new area of Shenhu,and good heterogeneity has been found throughout the spatial distribution of the reservoir.After distinguishing different sedimentary sequence types and matching their formation with slope deposition settings,this study proposes three mass transport deposit(MTD)patterns related to canyon activity that occurred contemporaneously or epigenetically with it:well preserved MTDs,MTDs eroded by canyon migration,and MTDs dislocated by contemporaneous faults.Based on seismic reflection characteristics,this study proposed methods of quantitatively analyzing sedimentary factors,such as measuring the turbidities flow rate in the canyon,and results are interpreted with respect to canyon activity.Combining the above parameters and their relationship with gas hydrate accumulation,fine-grained seals overlapping coarse MTDs reservoirs are found to be indispensable to gas hydrate accumulation,as they prevent the release of free gas.Based on grain size data of hydrate samples from drilling wells,multi-layered gas hydrate reservoirs capped by fine-grained sediments and overlapping mud show favorable hydrate-bearing prospects.The release of gas hydrates,however,is mostly caused by the lack of mud sealing in relation to canyon activity,such as turbidities flow erosion and contemporaneous fault breaking.Canyon migration with respect to MTDs may be the actual cause of erosion of overlapping syn-sedimentary layers,and high bottom flows may contribute to an increase in the release of free gas.It is believed that contemporaneous faults caused by unstable canyon walls may break the muddy over layers and decrease the accumulation pressure of gas hydrate bearing.Thus,according to the sedimentary characteristics of MTDs and the hydrate accumulation process,three responding accumulation or releasing patterns are proposed,which respond to the different types of MTDs distinguished above:a well-preserved MTD accumulation pattern;a canyon migration eroded MTD release patt 展开更多
关键词 South China Sea gas HYDRATE SEDIMENTARY characteristics MTDs HYDRATE responding pattern
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Effect of Nanobubble Evolution on Hydrate Process: A Review
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作者 ZHANG Yue ZHAO Li +3 位作者 DENG Shuai ZHAO Ruikai NIE Xianhua LIU Yinan 《热科学学报:英文版》 SCIE EI CAS CSCD 2019年第5期948-961,共14页
As a huge reserve for potential energy, natural gas hydrates(NGHs) are attracting increasingly extra attentions, and a series of researches on gas recovery from NGHs sediments have been carried out. But the slow forma... As a huge reserve for potential energy, natural gas hydrates(NGHs) are attracting increasingly extra attentions, and a series of researches on gas recovery from NGHs sediments have been carried out. But the slow formation and dissociation kinetics of NGHs is a major bottleneck in the applications of NGHs technology. Previous studies have shown that nanobubbles, which formed from melt hydrates, have significant promotion effects on dissociation and reformation dynamics of gas hydrates. Nanobubbles can persist for a long time in liquids, disaccording with the standpoint of classical thermodynamic theories, thus they can participate in the hydrate process. Based on different types of hydrate systems(gas + water, gas +water +inhibitors/promoters, gas + water + hydrophilic/hydrophobic surface), the effects of nanobubble evolution on nucleation, dissociation, reformation process and "memory effect" of gas hydrates are discussed in this paper. Researches on the nanobubbles in hydrate process are also summarized and prospected in this study. 展开更多
关键词 gas HYDRATES NANOBUBBLES memory EFFECT HYDRATE process
Sedimentary characteristics comparison and genesis analysis of the deepwater channel in the hydrate enrichment zones on the north slope of the South China Sea 预览
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作者 Chao Fu Xinghe Yu +3 位作者 Yiis Dong Yulin He Jinqiang Liang Zenggui Kuang 《海洋学报:英文版》 SCIE CAS CSCD 2019年第3期103-113,共11页
Natural gas hydrate(NGH) is one of the important clean energy at present and even in the future. The study of its sedimentary environment and minerogenetic condition has long been a hot issue that has received much co... Natural gas hydrate(NGH) is one of the important clean energy at present and even in the future. The study of its sedimentary environment and minerogenetic condition has long been a hot issue that has received much concern from geologists all over the world. China has successfully obtained the samples of NGH in Shenhu and Dongsha sea areas in 2007, 2013 and 2015, respectively. From this, the continental slope north of the South China Sea becomes an important test site for the study of NGH sedimentary genesis and minerogenetic condition. NGH has been found in Shenhu, Dongsha and Qiongdongnan areas within the continental slope north of South China Sea,at different depths of water, with different sedimentary characteristics, gas genesis, and minerogenetic conditions.Using a seismic sedimentology theory, combining seismic facies results of each facies, sedimentary facies and evolution of each area are documented in turn establishing a sedimentary model by considering palaeogeomorphology, sea level change and tectonic movement. The channel system and MTD(Mass Transport Deposition) system among these three areas were compared focusing on the developing position, appearance and controlling factors. Relative location among three areas is firstly defined that Dongsha area in a nearprovenance steep upper slope, Shenhu area in a normal gentle slope and Qiongdongnan area in an awayprovenance flat plain. Besides, their channel systems are classified into erosional, erosional-aggradational and aggradational channel, and MTD systems into headwall domain, translational domain and toe domain. 展开更多
关键词 sedimentary characteristics DEEP-SEA channel GENESIS COMPARISON HYDRATE ENRICHMENT ZONES
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Undrained shear strength evaluation for hydrate-bearing sediment overlying strata in the Shenhu area, northern South China Sea 预览
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作者 Yanlong Li Gaowei Hu +3 位作者 Nengyou Wu Changling Liu Qiang Chen Chen’an Li 《海洋学报:英文版》 SCIE CAS CSCD 2019年第3期114-123,共10页
The undrained shear strength of shallow strata is a critical parameter for safety design in deep-water operations.In situ piezocone penetration tests(CPTU) and laboratory experiments are performed at Site W18-19 in th... The undrained shear strength of shallow strata is a critical parameter for safety design in deep-water operations.In situ piezocone penetration tests(CPTU) and laboratory experiments are performed at Site W18-19 in the Shenhu area, northern South China Sea, where China’s first marine hydrate exploitation operation is due to be located. The validation of the undrained shear strength prediction model based on CPTU parameters. Different laboratory tests, including pocket penetrometer, torvane, miniature vane and unconsolidated undrained triaxial tests, are employed to solve empirical cone coefficients by statistical and mathematical methods. Finally, an optimized model is proposed to describe the longitudinal distribution of undrained shear strength in calcareous clay strata in the Shenhu area. Research results reveal that average empirical cone coefficients based on total cone resistance, effective resistance, and excess-pore pressure are 13.8, 4.2 and 14.4, respectively. The undrained shear strength prediction model shows a good fit with the laboratory results only within specific intervals based on their compaction degree and gas-bearing conditions. The optimized prediction model in piecewise function format can be used to describe the longitudinal distribution of the undrained shear strength for calcareous clay within all depth intervals from the mud-line to the upper boundary of hydrate-bearing sediments(HBS). The optimized prediction result indicates that the effective cone resistance model is suitable for very soft to firm calcareous clays,the excess-pore pressure model can depict the undrained shear strength for firm to very stiff but gas-free clays,while the total cone resistance model is advantageous for evaluating the undrained shear strength for very stiff and gassy clays. The optimized model in piecewise function format can considerably improve the adaptability of empirical models for calcareous clay in the Shenhu area. These results are significant for safety evaluations of proposed hydrate exploitat 展开更多
关键词 piezocone penetration TEST HYDRATE EXPLOITATION TEST UNDRAINED shear strength CALCAREOUS clay Shenhu area South China Sea
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利用水合物法分离捕集二氧化碳研究进展 预览
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作者 谢文俊 徐纯刚 李小森 《新能源进展》 2019年第3期277-286,共10页
我国是以煤炭为主要能源的国家,面临着严峻的碳减排挑战。相对于传统气体分离技术,水合物法CO2分离捕集技术具有环境友好、工艺简单、能耗低等特点,被认为是具有应用前景的CO2分离捕集技术,因而被广泛研究。综合调研了国内外水合物法分... 我国是以煤炭为主要能源的国家,面临着严峻的碳减排挑战。相对于传统气体分离技术,水合物法CO2分离捕集技术具有环境友好、工艺简单、能耗低等特点,被认为是具有应用前景的CO2分离捕集技术,因而被广泛研究。综合调研了国内外水合物法分离捕集CO2的研究,从热力学、动力学、微观分析、分离工艺及分离装备、成本比较等方面对相关研究进行了系统分析及综合评价,并详细讨论了水合物平衡条件和不同类型添加剂对水合物平衡条件的影响。为进一步开发水合物法CO2分离捕集技术的研究提供指导。 展开更多
关键词 水合物 二氧化碳 碳减排 气体分离
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低水化热水泥浆用微胶囊型热控材料制备及应用
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作者 冯茜 刘先杰 +2 位作者 彭志刚 霍锦华 刘欢 《精细化工》 EI CAS CSCD 北大核心 2019年第7期1453-1458,共6页
基于天然气水合物低温、高压及电解质条件下的分解特性,以常规波特兰油井水泥为基料,外掺入微胶囊型热控材料(PCM-1),制备了一种低水化热水泥浆体系。采用自研半绝热测试实验设备对水泥浆体系早期水化过程中的温度进行了连续测量,以水... 基于天然气水合物低温、高压及电解质条件下的分解特性,以常规波特兰油井水泥为基料,外掺入微胶囊型热控材料(PCM-1),制备了一种低水化热水泥浆体系。采用自研半绝热测试实验设备对水泥浆体系早期水化过程中的温度进行了连续测量,以水泥浆体系最高温度(Tm)及最大水化温升(Tr)表征了PCM-1对水泥浆体系水化热的控制效应。结果表明,PCM-1的含量15%时(以水泥的质量为基准,下同),该水泥浆较纯水泥浆的水化最高温度下降了22.3℃,最大水化温升下降了23.6℃;24 h及48h水化热分别下降了7.68×10^4J及7.28×10^4J。微胶囊能够有效地控制水泥浆的水化温升及水化热,大幅降低了深水水合物层的固井风险。 展开更多
关键词 深水固井 水合物 微胶囊型热控材料 水化温升 水泥浆水化热 油田化学品与油品添加剂
炼油厂轻烃管道水合物生成模拟与预防 预览
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作者 孟锐 《炼油技术与工程》 CAS 2019年第5期61-64,共4页
冬季气温较低时,C1~C4等轻烃类输送管道由于含有水分易发生冻堵,镇海炼化Ⅱ焦化富气线、脱后焦化液化石油气、焦气回收富乙烷气及低压燃料气等在冬季均因水合物(可燃冰)的生成发生过冻堵,严重威胁装置生产。借助于RSIM流程模拟软件,对... 冬季气温较低时,C1~C4等轻烃类输送管道由于含有水分易发生冻堵,镇海炼化Ⅱ焦化富气线、脱后焦化液化石油气、焦气回收富乙烷气及低压燃料气等在冬季均因水合物(可燃冰)的生成发生过冻堵,严重威胁装置生产。借助于RSIM流程模拟软件,对冻堵原因即水合物生成条件进行模拟。模拟结果表明,水合物生成由易到难顺序为硫化氢>乙烷>乙烯>丙烷>异丁烷>二氧化碳>甲烷,炼油厂常见的焦化和常减压饱和液化烃水合物生成温度约2.2℃。从工艺和工程方面给出预防措施。 展开更多
关键词 炼油厂 轻烃管道 堵塞 水合物 模拟 冻结 预防
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Impacts of C02 and H2S on the risk of hydrate formation during pipeline transport of natural gas
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作者 Solomon A. Aromada Bjorn Kvamme 《化学科学与工程前沿:英文版》 EI CAS CSCD 2019年第3期616-627,共12页
Evaluation of maximum content of water in natural gas before water condenses out at a given temperature and pressure is the initial step in hydrate risk analysis during pipeline transport of natural gas, The impacts o... Evaluation of maximum content of water in natural gas before water condenses out at a given temperature and pressure is the initial step in hydrate risk analysis during pipeline transport of natural gas, The impacts of CO2 and ELS in natural gas on the maximum mole-fractions of water that can be tolerated during pipeline transport without the risk of hydrate nucleation has been studied using our novel thermodynamic scheme. Troll gas from the North Sea is used as a reference ease, it contains very negligible amount of CO2 and no H2S. Varying mole-fractions of CO2 and INS were introduced into the Troll gas, and the effects these inorganic impurities on the water tolerance of the system were evaluated. It is observed that CO2 does not cause any distinguishable impact on water tolerance of the system, but H2S does. Water tolerance decreases with increase in concentration of H2S. The impact of ethane on the system was also investigated. The maximum mole-fraction of water permitted in the gas to ensure prevention of hydrate formation also decreases with increase in the concentration of C?Hft like H2S. H2S has the most impact, it tolerates the least amount of water among the components studied. 展开更多
关键词 HYDRATE hydrogen SULPHIDE C02 dewpoint PIPELINE
天然气水合物生产系统流程的风险分析 预览
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作者 范锦涛 范豆 《石化技术》 CAS 2019年第3期78-79,共2页
从天然水合物沉积物中释放出来的烃类在海底气体收集网络中的运输与更传统的烃类生产面临的许多风险相同。人们熟知的是,有必要确保这些流体不会在流动网络中重新组合成水合物,保证可以流动。本文描述了一种评估产出水合物矿床运输流线... 从天然水合物沉积物中释放出来的烃类在海底气体收集网络中的运输与更传统的烃类生产面临的许多风险相同。人们熟知的是,有必要确保这些流体不会在流动网络中重新组合成水合物,保证可以流动。本文描述了一种评估产出水合物矿床运输流线中水合物形成的风险分析方法。通过澳大利亚海岸发现的典型测深,分析出其具有富含甲烷的天然水合物沉积物的流体特性。全面评估水合物形成的风险,基于蒙特卡罗模拟排污压力和成核温度的概率分析,与水合物形成的严重性的目标瞬态分析相结合,这种分析方法聚焦于天然气运输系统中水合物形成的机制。 展开更多
关键词 天然气 水合物 风险
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海底油气管道流动保障技术研究进展 预览
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作者 朱梦影 程涛 +2 位作者 孔冰 李少芳 郭奕杉 《当代化工》 CAS 2019年第8期1755-1758,1762共5页
面对深海低温高压的特殊环境,在深海油气田的不断开发过程中,流动保障成为了深海油气资源输送过程中亟待解决的问题之一.在深海油气田的流动保障中所要解决的主要问题是流动堵塞,即水合物、蜡、水垢、沥青质等固相的沉积.主要从蜡沉积... 面对深海低温高压的特殊环境,在深海油气田的不断开发过程中,流动保障成为了深海油气资源输送过程中亟待解决的问题之一.在深海油气田的流动保障中所要解决的主要问题是流动堵塞,即水合物、蜡、水垢、沥青质等固相的沉积.主要从蜡沉积、水合物生成以及二者之间的相互影响等三个方面进行论述,介绍了国内外深海管道流动保障技术研究的最新进展,为我国在深海油气田流动保障技术的进一步研究提供了参考. 展开更多
关键词 深海油气田 流动保障 水合物 蜡沉积
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13X分子筛耦合四丁基溴化铵促进剂作用下CO2/H2水合物形成动力学 预览
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作者 燕然 陈朝阳 +4 位作者 夏志明 李小森 徐纯刚 颜克凤 蔡晶 《化工进展》 EI CAS CSCD 北大核心 2019年第9期4036-4043,共8页
水合物法捕集CO2技术因其清洁环保、工艺简单等优点成为研究热点。但气液传热传质速度慢导致的形成速率慢、储气能力低等关键问题亟待解决。利用13X分子筛耦合四丁基溴化铵(TBAB)促进剂在279.15~280.65K、3.0~6.0MPa研究了CO2/H2(39.8%C... 水合物法捕集CO2技术因其清洁环保、工艺简单等优点成为研究热点。但气液传热传质速度慢导致的形成速率慢、储气能力低等关键问题亟待解决。利用13X分子筛耦合四丁基溴化铵(TBAB)促进剂在279.15~280.65K、3.0~6.0MPa研究了CO2/H2(39.8%CO2/60.2%H2)水合物的形成过程的压降曲线和气体消耗量,并对比分析了TBAB浓度、压力对其促进效果的影响。实验结果表明,与采用搅拌方式的TBAB/CO2/H2水合物形成过程相比,13X分子筛可显著提高TBAB/CO2/H2水合物的压降速率和气体消耗量。在279.15K、3.0MPa,随着TBAB溶液浓度增大,CO2/H2水合物形成过程的气体消耗量先增大后减小;而当温压条件为280.65K、3.0MPa时,气体消耗量随耦合促进剂中TBAB浓度变化仍遵循类似规律。此外,13X分子筛耦合TBAB促进剂对CO2/H2水合物压降速率和气体消耗量的影响随着实验压力升高而升高。 展开更多
关键词 四丁基溴化铵 水合物 合成气 动力学 13X分子筛
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有机相变乳液中HCFC-141b水合物生成及稳定性 预览
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作者 周麟晨 孙志高 +3 位作者 陆玲 王赛 李娟 李翠敏 《化工学报》 EI CAS CSCD 北大核心 2019年第5期1674-1681,共8页
为了促进水合物形成,在HCFC-141b、有机相变材料(正癸酸和十二醇)和水体系中添加表面活性剂Tween80和Span80作为乳化剂,采用高速搅拌的方法制备了有机相变材料-表面活性剂-制冷剂-水乳液体系,增大水分子与制冷剂的接触面积。实验研究了... 为了促进水合物形成,在HCFC-141b、有机相变材料(正癸酸和十二醇)和水体系中添加表面活性剂Tween80和Span80作为乳化剂,采用高速搅拌的方法制备了有机相变材料-表面活性剂-制冷剂-水乳液体系,增大水分子与制冷剂的接触面积。实验研究了静态条件下有机相变材料和表面活性剂添加量对水合物形成的影响。研究结果表明添加乳化剂可以有效提高水合物的蓄冷量,减少水合物形成诱导时间,降低水合物生成的随机性;温度越低,水合物促进效果越好。水合物生成/分解循环实验表明,添加Tween80的乳液体系的稳定性好,有机相变乳液提高了水合物生成/分解循环过程的稳定性。 展开更多
关键词 水合物 表面活性剂 HCFC-141B 蓄冷 相变 乳液 稳定性 诱导时间
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Introduction to Key Laboratory of Gas Hydrate,Ministry of Natural Resources 预览
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作者 Neng-you Wu Chang-ling Liu Cheng-feng Li 《中国地质(英文)》 2019年第2期254-256,共3页
The Key Laboratory of Gas Hydrate, Ministry of Natural Resources, established in 2012 belongs to Qingdao Institute of Marine Geology, China Geological Survey. Prof. Neng-you Wu is the Director of Laboratory and Prof. ... The Key Laboratory of Gas Hydrate, Ministry of Natural Resources, established in 2012 belongs to Qingdao Institute of Marine Geology, China Geological Survey. Prof. Neng-you Wu is the Director of Laboratory and Prof. Yu-guang Ye is the Director of Academic Committee (Fig. 1). Now, the laboratory has been recognized as one of the leading laboratories in the world in terms of gas hydrate experimental technology. 展开更多
关键词 Gas HYDRATE MINISTRY of Natural RESOURCES LABORATORY
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黄连素-染料木素有机盐水合物的制备、晶体结构及溶解性 预览
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作者 周凯 翁莹 +1 位作者 侯青青 娄本勇 《应用化学》 CAS CSCD 北大核心 2019年第2期230-235,共6页
合成了黄连素和染料木素的有机盐水合物[C20H18NO4]^+·[C15H9O5]^-·2.5H2O·0.5(C2H5OH),并测定了其晶体结构。解析结果表明,该有机盐水合物属于单斜晶系,P21/c空间群。染料木素7取代位的羟基失去了质子变成了染料木素阴... 合成了黄连素和染料木素的有机盐水合物[C20H18NO4]^+·[C15H9O5]^-·2.5H2O·0.5(C2H5OH),并测定了其晶体结构。解析结果表明,该有机盐水合物属于单斜晶系,P21/c空间群。染料木素7取代位的羟基失去了质子变成了染料木素阴离子。羟基阴离子与4′取代位上的羟基形成了O-H…O^-氢键,产生了一维的氢键链状结构。两个水分子通过氢键作用形成了链状结构,并与染料木素阴离子形成二维的氢键结构。加热失去水分子后,有机盐水合物变成无定型状态。在乙醇水溶液中悬浮后,无定型可以转变成结晶的水合物结构。形成黄连素-染料木素有机盐水合物后,染料木素在水中的溶解度略有增加。 展开更多
关键词 黄连素 染料木素 有机盐 水合物 氢键
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水合物热力学抑制剂临界最低加剂量的计算方法
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作者 于一帆 史博会 +4 位作者 王嘉琪 赵仁杰 刘思良 孟祥华 宫敬 《油气储运》 CAS 北大核心 2019年第5期547-553,561共8页
在油气管道输送过程中,低温高压工况易生成水合物从而影响管道输送效率,严重时会引起管道堵塞。在实际工程应用中,通常采用添加热力学抑制剂的方式防止水合物的生成,常用的热力学抑制剂有甲醇、乙二醇等。确定合理的热力学抑制剂加剂量... 在油气管道输送过程中,低温高压工况易生成水合物从而影响管道输送效率,严重时会引起管道堵塞。在实际工程应用中,通常采用添加热力学抑制剂的方式防止水合物的生成,常用的热力学抑制剂有甲醇、乙二醇等。确定合理的热力学抑制剂加剂量,对于保证管道的安全经济运行具有重要意义。在Chen-Guo双过程水合物热力学模型的基础上,应用Wilson模型确定水-醇溶液中水的活度,建立了含抑制剂体系水合物生成平衡条件的计算方法,并提出采用预估-试算-调整的思路确定管道运行工况点所需抑制剂的临界最低加剂量。实例验证表明,所提方法计算简单,精度高,能够满足实际工程需要。 展开更多
关键词 水合物 抑制剂 Chen-Guo模型 加剂量
水合物形成促进剂研究进展 预览
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作者 周麟晨 孙志高 +1 位作者 李娟 李翠敏 《化工进展》 EI CAS CSCD 北大核心 2019年第9期4131-4141,共11页
添加促进剂是高效制备水合物的研究热点,促进剂及其添加量对水合物生成效果至关重要。本文主要从热力学促进剂和动力学促进剂两大类型进行分析:总结了可溶水相热力学促进剂和不可溶水相热力学促进剂的浓度对水合物形成相平衡的影响;从... 添加促进剂是高效制备水合物的研究热点,促进剂及其添加量对水合物生成效果至关重要。本文主要从热力学促进剂和动力学促进剂两大类型进行分析:总结了可溶水相热力学促进剂和不可溶水相热力学促进剂的浓度对水合物形成相平衡的影响;从表面活性剂、纳米粒子和相变材料等添加剂,阐述了动力学促进剂添加量对水合物生成诱导时间、储气量和生成速率等方面的影响。促进剂都存在最佳浓度的添加量,并且不同类型促进剂复配更有利于水合物生成。目前添加促进剂后水合物形成机理的研究大多从宏观现象推测,部分学者通过拉曼光谱、X射线衍射和显微观察探索分析促进剂对水合物形成的微观影响,这方面研究有待于进一步开展。添加量作为水合物形成促进剂的重要指标,研究者应得到水合物形成促进剂的最佳浓度与所研究对象的关联性。 展开更多
关键词 水合物 相平衡 表面活性剂 纳米粒子 相变材料 动力学 成核
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