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Geological Conditions and Prospect Forecast of Shale Gas Formation in Qiangtang Basin, Qinghai-Tibet Plateau 被引量:3
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作者 YU Yuanjiang ZOU Caineng +7 位作者 DONG Dazhong WANG Shejiao LI Jianzhong YANG Hua LI Denghua LI Xinjing WANG Yuman HUANG Jinliang 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第2期598-619,共22页
The presence of shale gas has been confirmed in almost every marine shale distribution area in North America.Formation conditions of shale gas in China are the most favorable for marine,organic-rich shale as well.But ... The presence of shale gas has been confirmed in almost every marine shale distribution area in North America.Formation conditions of shale gas in China are the most favorable for marine,organic-rich shale as well.But there has been little research focusing on shale gas in Qiangtang Basin,Qinghai-Tibet Plateau,where a lot of Mesozoic marine shale formations developed.Based on the survey results of petroleum geology and comprehensive test analysis data for Qinghai-Tibet Plateau,for the first time,this paper discusses characteristics of sedimentary development,thickness distribution,geochemistry,reservoir and burial depth of organic-rich shale,and geological conditions for shale gas formation in Qiangtang Basin.There are four sets of marine shale strata in Qiangtang Basin including Upper Triassic Xiaochaka Formation (T3x),Middle Jurassic Buqu Formation (J2b),Xiali Formation (J2x) and Upper Jurassic Suowa Formation (J3s),the sedimentary types of which are mainly bathyal-basin facies,open platform-platform margin slope facies,lagoon and tidal-fiat facies,as well as delta facies.By comparing it with the indicators of gas shale in the main U.S.basins,it was found that the four marine shale formations in Qiangtang Basin constitute a multi-layer distribution of organic-rich shale,featuring a high degree of thickness and low abundance of organic matter,high thermal evolution maturity,many kinds of brittle minerals,an equivalent content of quartz and clay minerals,a high content of feldspar and low porosity,which provide basic conditions for an accumulation of shale gas resources.Xiaochaka Formation shale is widely distributed,with big thickness and the best gas generating indicators.It is the main gas source layer.Xiali Formation shale is of intermediate thickness and coverage area,with relatively good gas generating indicators and moderate gas formation potential.Buqu Formation shale and Suowa Formation shale are of relatively large thickness,and covering a small area,with poor gas generating indicators,and limited gas formation potential.The shale gas geological resources and technically recoverable resources were estimated by using geologic analogy method,and the prospective areas and potentially favorable areas for Mesozoic marine shale gas in Qiangtang Basin are forecast and analyzed.It is relatively favorable in a tectonic setting and indication of oil and gas,shale maturity,sedimentary thickness and gypsum-salt beds,and in terms of mineral association for shale gas accumulation.But the challenge lies in overcoming the harsh natural conditions which contributes to great difficulties in ground engineering and exploration,and high exploration costs. 展开更多
关键词 Shale gas marine shale geological characteristics geological conditions for gas formation resources prospect forecast Qiangtang Basin
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INVESTIGATION OF THE PALEOGEOTHERMAL TECTONIC HISTORY ON DONGPU DEPRESSION AND OIL/GAS FORMATION BY FISSION-TRACK METHOD
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作者 WANG Lu (Cnang sha Institute of Geoteetonies, Acad emia Sinica, Chang sha, 410013) 《Geotectonica et Metallogenia》 1994年第Z1期38-50,共2页
Dongpu depression is a fault basin at residual-mobility period of Diwa stage, it developed on the strata of the Mesozoie and Pre-Mesozoie. It is one of the important oil/gas- bearing basin during Cenozoie era along th... Dongpu depression is a fault basin at residual-mobility period of Diwa stage, it developed on the strata of the Mesozoie and Pre-Mesozoie. It is one of the important oil/gas- bearing basin during Cenozoie era along the East China. The strueture in Dongpu geodepression is very complex. There exists a strueture pattern with east- and west-depression belts and one central swell belt, it is divided into the southern- and northern-division by Gaopingji (orMeng Ju ) -Xieheng fault. 展开更多
关键词 gas INVESTIGATION OF THE PALEOGEOTHERMAL TECTONIC HISTORY ON DONGPU DEPRESSION AND OIL/gas formation BY FISSION-TRACK METHOD PB
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Formation of Natural Bitumen and its Implication for Oil/gas Prospect in Dabashan Foreland 被引量:7
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作者 LI Rongxi DONG Shuwen +1 位作者 ZHANG Xue ZHU Ruijing 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2012年第2期462-472,共11页
Natural bitumen is the evolutionary residue of hydrocarbon of sedimentary organic matter. Several kinds of bitumen with different occurrences, including bitumen in source rock, migration bitumen filled in fault, oil-b... Natural bitumen is the evolutionary residue of hydrocarbon of sedimentary organic matter. Several kinds of bitumen with different occurrences, including bitumen in source rock, migration bitumen filled in fault, oil-bed bitumen and paleo-reservoir bitumen, are distributed widely in the Dabashan foreland. These kinds of bitumen represent the process of oil/gas formation, migration and accumulation in the region. Bitumen in source rock fiUed in fractures and stylolite and experienced deformation simultaneously together with source rock themselves. It indicated that oil/gas generation and expelling from source rock occurred under normal buried thermal conditions during prototype basin evolution stages prior to orogeny. Occurrences of bitumen in source rock indicated that paleo- reservoir formation conditions existed in the Dabashan foreland. Migration bitumen being widespread in the fault revealed that the fault was the main channel for oil/gas migration, which occurred synchronously with Jurassic foreland deformation. Oil-bed bitumen was the kind of pyrolysis bitumen that distributed in solution pores of reservoir rock in the Dabashan foreland depression, the northeastern Sichuan Basin. Geochemistry of oil-bed bitumen indicated that natural gas that accumulated in the Dabashan foreland depression formed from liquid hydrocarbon by pyrolysis process. However, paleo-reservior bitumen in the Dabashan forleland was the kind of degradation bitumen that formed from liquid hydrocarbon within the paleo-reservior by oxidation, alteration and other secondary changes due to paleo-reservior damage during tectonics in the Dabashan foreland. In combination with the tectonic evolution of the Dabashan foreland, it is proposed that the oil/gas generated, migrated and accumulated to form the paleo-reservoir during the Triassic Indosinian tectonic movement. Jurassic collision orogeny, the Yanshan tectonic movement, led to intracontinental orogeny of the Dabashan area accompanied by geofluid expelling and paleo-reservoir damage in the Dabashan foreland. The present work proposed that there is liquid hydrocarbon exploration potential in the Dabashan foreland, while there are prospects for the existence of natural gas in the Dabashan foreland depression. 展开更多
关键词 BITUMEN PALEO-RESERVOIR oil/gas formation MIGRATION Dabashan foreland
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Formation Mechanism of the Changxing Formation Gas Reservoir in the Yuanba Gas Field,Sichuan Basin,China 被引量:9
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作者 LONG Shengxian HUANG Renchun +3 位作者 LI Hongtao YOU Yuchun LIU Guoping BAI Zhenrui 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2011年第1期233-242,共10页
In a very gentle platform-margin paleogeographic environment, platform-margin reef flat facies carbonate reservoir rocks were developed in the Changxing Formation of Yuanba field. Later weak structural evolution and d... In a very gentle platform-margin paleogeographic environment, platform-margin reef flat facies carbonate reservoir rocks were developed in the Changxing Formation of Yuanba field. Later weak structural evolution and diagenetic evolution caused the Changxing Formation to form lithologic traps, with good reservoirs such as dissolved bioclastic dolostone and dissolved pore dolostone. The Changxing Formation gas reservoir is a pseudo-layered porous lithologic gas reservoir under pressure depletion drive, with high H2S and moderate CO2 contents. This paper predictes that the conducting system for the Changxing Formation gas reservoir is possibly composed of the pores and microfractures in the Changxing Formation reservoir, the top erosional surface of the Changxing Formation, as well as the micropores and microfractures in the underlying formations. The Changxing Formation reservoir has experienced 3 hydrocarbon charging stages. This paper suggests that diffusion is the major formation mechanism for this gas reservoir. In the Middle and Late Yanshanian, the Yuanba area entered the major gas charging stage. The gas migrated mainly through diffusion and with the assistance of seepage flow in small faults and microfractures from the source rocks and the other oil-bearing strata to the Changxing Formation carbonate reservoir rocks, forming lithologic gas pools. In the Himalayan Epoch, the lithologic traps were uplifted as a whole without strong modification or overlapping, and were favorable for gas preservation. 展开更多
关键词 Changxing formation gas reservoir reef fiat facies carbonate reservoir rocks lithologictrap charging stage formation mechanism Yuanba gas Field Sichuan basin China
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VISUAL OBSERBATION OF HCFC141b GAS HYDRATE FORMATION/DECOMPOSITION PROCESS OUTSIDE OF A TUBE 被引量:3
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作者 谢应明 郭开华 +2 位作者 樊栓狮 梁德青 顾建明 《化工学报》 EI CAS CSCD 北大核心 2003年第z1期91-97,共7页
In order to design a kind of heat exchanger suitable to the indirect-touched gas hydrate cool storage vessel, a visual observation of HCFC141b gas hydrate formation/decomposition process was presented through a self-d... In order to design a kind of heat exchanger suitable to the indirect-touched gas hydrate cool storage vessel, a visual observation of HCFC141b gas hydrate formation/decomposition process was presented through a self-designed small-scale visualization apparatus of gas hydrate cool storage. Based on the shooted photos and recorded temperatures, the formation/decomposition process of HCFC141b are described, some characteristics are concluded, and some suggestions of designing heat exchanger are indicated according to the specific characteristics of HCFC141b gas hydrate formation/decomposition process. 展开更多
关键词 into or form as it on HCFC VISUAL OBSERBATION OF HCFC141b gas HYDRATE formation/DECOMPOSITION PROCESS OUTSIDE OF A TUBE of heat that 化工学报 from be down rate
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Source Rock and Cap Rock Controls on the Upper Ordovician Wufeng Formation–Lower Silurian Longmaxi Formation Shale Gas Accumulation in the Sichuan Basin and its Peripheral Areas 被引量:21
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作者 NIE Haikuan JIN Zhijun 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第3期1059-1060,共2页
Objective The Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation is one of the priority interval for shale gas exploration in the Sichuan Basin and its peripheral areas, and commercial shale gas has b... Objective The Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation is one of the priority interval for shale gas exploration in the Sichuan Basin and its peripheral areas, and commercial shale gas has been discovered from this interval in Jiaoshiba, Changning and Weiyuan shale gas fields in Sichuan Province. However, there is no significant discovery in other parts of the basin due to the different quality of black shale and the differences of tectonic evolution. Based on the progress of shale gas geological theory and exploration discoveries, as well as the theory of "source rock and cap rock controls on hydrocarbon accumulation", of the Upper Ordovician the main controlling factors Wufeng Formation-Lower Silurian Longmaxi Formation shale gas enrichment in the Sichuan Basin and its peripheral areas were analyzed, and the source rock and cap rock controls on the shale gas were also discussed. The results can provide new insights for the next shale gas exploration in this area. 展开更多
关键词 ROCK Lower Silurian Longmaxi formation Shale gas Accumulation in the Sichuan Basin and its Peripheral Areas Source Rock and Cap Rock Controls on the Upper Ordovician Wufeng formation
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Discovery of Marine-terrestrial Transitional Facies Shale Gas in Taiyuan Formation of Zhenjia 1 Well,Northern Shaanxi,Ordos basin 被引量:1
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作者 ZHANG Yongsheng ZHENG Mianping +7 位作者 XING Enyuan LI Yangchi GUI Baoling SHI Lizhi HE Yongtao WANG Linlin PENG Yuan ZHAO Haitong 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第3期1141-1142,共2页
Objective At present, there is controversy regarding the existence of marine-terrestrial transitional facies that can act as a source of shale gas. This detailed study of Carboniferous-Permian age geological data from... Objective At present, there is controversy regarding the existence of marine-terrestrial transitional facies that can act as a source of shale gas. This detailed study of Carboniferous-Permian age geological data from the northern Shaanxi area (China) provides new insight for this type of shale gas. In addition, a new deposition and accumulation pattern for this type of shale gas is established. 展开更多
关键词 of as is on it Discovery of Marine-terrestrial Transitional Facies Shale gas in Taiyuan formation of Zhenjia 1 Well Northern Shaanxi Ordos basin in
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MOLECULAR DYNAMICS SIMULATIONS OF FILLED AND EMPTY CAGE-LIKE WATER CLUSTERS IN LIQUID WATER AND THEIR SIGNIFICANCE TO GAS HYDRATE FORMATION MECHANISMS
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作者 GUO Guangjun,ZHANG Yigang and ZHAO Yajuan Institute of Geology and Geophysics,Chinese Academy of sciences Beijing 100029,Chinese 《化工学报》 EI CAS CSCD 北大核心 2003年第z1期62-66,共5页
Molecular dynamics simulations are performed to observe the evolutions of 512 and 51262 cage-like water clusters filled with or without a methane molecule immersed in bulk liquid water at 250 K and 230 K. The lifetime... Molecular dynamics simulations are performed to observe the evolutions of 512 and 51262 cage-like water clusters filled with or without a methane molecule immersed in bulk liquid water at 250 K and 230 K. The lifetimes of these clusters are calculated according to their Lindemann index δ (t) using the criteria of δ≥0.07. For both the filled and empty clusters, we find the dynamics of bulk water determines the lifetimes of cage-like water clusters, and that the lifetime of 512 62 cage-like cluster is the same as that of 512 cage-like cluster. Although the methane molecule indeed makes the filled cage-like cluster more stable than the empty one, the empty cage-like cluster still has chance to be long-lived compared with the filled clusters. These observations support the labile cluster hypothesis on the formation mechanisms of gas hydrates. 展开更多
关键词 like in time that were MOLECULAR DYNAMICS SIMULATIONS OF FILLED AND EMPTY CAGE-LIKE WATER CLUSTERS IN LIQUID WATER AND THEIR SIGNIFICANCE TO gas HYDRATE formation MECHANISMS of cage gas
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Conditions for the Formation of Oil and Gas Pools in Tertiary Volcanics in the Western Part of the Huimin Sag, Shandong and Their Distribution
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作者 Liu Zerong and Xin Quanlin East China Petroleum Institute, Dongying, Shandong Wang Yongjie, Xu Piqin and Zhang Xiaofeng Shengli Oilfield, Dongying, Shandong Yang Shuren 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1989年第1期23-37,共15页
Conditions for the Formation of oil and gas pools in Tertiary volcanics in the western part of the Huimin sag, Shandong and then (?)stribution have been studied based on the geological, seismic and well-logging inform... Conditions for the Formation of oil and gas pools in Tertiary volcanics in the western part of the Huimin sag, Shandong and then (?)stribution have been studied based on the geological, seismic and well-logging information. In this paper, the types and lithofacies of the volcanic rocks in the western part of the Huimin sag are described; the relationship between rocks and electrical properties, the seismic reflection structures, the development and distribution of the volcanic rocks are expounded; and the fourfold role of the volcanic activities in the formation of the oil and gas pools is also dealt with. It is considered by the authors that the volcanic activities were not destructive to the formation of oil and gas pools but a factor favourable to the accumulation of organic matters and their conversion to hydrocarbon. The volcanic rocks might have served as reservoir rocks and cap rocks, or as a synsedimentary anticline. The prerequisites and important factors for the formation of oil and gas pools and their distribution are pointed out in the paper. 展开更多
关键词 Conditions for the formation of Oil and gas Pools in Tertiary Volcanics in the Western Part of the Huimin Sag
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GEOTHERMAL EVOLUTION OF THE DIWA-TYPE SEDIMENTARY BASIN AND ITS CONTROLLING ON THE FORMATION OF OIL/GAS POOLS
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《Geotectonica et Metallogenia》 1994年第Z2期113-115,共3页
关键词 gas GEOTHERMAL EVOLUTION OF THE DIWA-TYPE SEDIMENTARY BASIN AND ITS CONTROLLING ON THE formation OF OIL/gas POOLS ITS
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TECTONIC EVOLUTION AND FORMATION OF OIL AND GAS POOLS OF THE BASINS BEARING OIL AND GAS IN CHINA
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《Geotectonica et Metallogenia》 1994年第Z2期118-119,共2页
关键词 gas TECTONIC EVOLUTION AND formation OF OIL AND gas POOLS OF THE BASINS BEARING OIL AND gas IN CHINA
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Characteristics and accumulation model of the late Quaternary shallow biogenic gas in the modern Changjiang delta area, eastern China 被引量:6
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作者 Xia Zhang Chun-Ming Lin 《Petroleum Science》 SCIE CAS CSCD 2017年第2期261-275,共15页
The Changjiang(Yangtze)is one of the largest rivers in the world.It formed a huge incised valley at its mouth during the Last Glacial Maximum;the incised-valley fill,approximately 80–110 m thick,supplies an importa... The Changjiang(Yangtze)is one of the largest rivers in the world.It formed a huge incised valley at its mouth during the Last Glacial Maximum;the incised-valley fill,approximately 80–110 m thick,supplies an important foundation for the generation of shallow biogenic-gas reservoirs.Two cores and 13 cone penetration tests were used to elaborate the characteristics,formation mechanism,and distribution of the shallow biogenic-gas reservoirs in the study area.The natural gas is mainly composed of CH4(generally[95%)with a δ^13CCH4 and δ^13CCO2 of-75.8 to-67.7% and -34.5 to-6.6%,respectively,and a δDCH4 of-215 to-185%,indicating a biogenic origin by the carbon dioxide reduction pathway.Commercial biogenic gas occurs primarily in the sand bodies of fluvial-channel,floodplain,and paleo-estuary facies with a burial depth of 50–80 m.Gas sources as well as cap beds are gray to yellowish-gray mud of floodplain,paleoestuary,and offshore shallow marine facies.The organic matter in gas sources is dominated by immature type Ⅲ kerogen(gas prone).The difference in permeability(about4–6 orders of magnitude)between cap beds and reservoirs makes the cap beds effectively prevent the upward escape of gas in the reservoirs.This formation mechanism is consistent with that for the shallow biogenic gas in the late Quaternary Qiantang River incised valley to the south.Therefore,this study should provide further insight into understanding the formation and distribution of shallow biogenic gas in other similar postglacial incised-valley systems. 展开更多
关键词 Biogenic gas - formation mechanism Late Quaternary Modern Changjiang delta Eastern China
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Modes of Shale-Gas Enrichment Controlled by Tectonic Evolution 被引量:4
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作者 LI Chaochun OU Chenghua 《Acta Geologica Sinica(English Edition)》 CAS CSCD 2018年第5期1934-1947,共14页
The typical characteristics of shale gas and the enrichment differences show that some shale gases are insufficiently explained by the existing continuous enrichment mode. These shale gases include the Wufeng–Longmax... The typical characteristics of shale gas and the enrichment differences show that some shale gases are insufficiently explained by the existing continuous enrichment mode. These shale gases include the Wufeng–Longmaxi shale gas in the Jiaoshiba and Youyang Blocks, the Lewis shale gas in the San Juan Basin. Further analysis reveals three static subsystems(hydrocarbon source rock, gas reservoirs and seal formations) and four dynamic subsystems(tectonic evolution, sedimentary sequence, diagenetic evolution and hydrocarbon-generation history) in shale-gas enrichment systems. Tectonic evolution drives the dynamic operation of the whole shale-gas enrichment system. The shale-gas enrichment modes controlled by tectonic evolution are classifiable into three groups and six subgroups. Group I modes are characterized by tectonically controlled hydrocarbon source rock, and include continuous in-situ biogenic shale gas(Ⅰ_1) and continuous in-situ thermogenic shale gas(Ⅰ_2). Group Ⅱ modes are characterized by tectonically controlled gas reservoirs, and include anticline-controlled reservoir enrichment(Ⅱ_1) and fracture-controlled reservoir enrichment(Ⅱ_2). Group Ⅲ modes possess tectonically controlled seal formations, and include faulted leakage enrichment(Ⅲ_1) and eroded residual enrichment(Ⅲ_2). In terms of quantity and exploitation potential, Ⅰ_1 and Ⅰ_2 are the best shale-gas enrichment modes, followed by Ⅱ_1 and Ⅱ_2. The least effective modes are Ⅲ_1 and Ⅲ_2. The categorization provides a different perspective for deep shale-gas exploration. 展开更多
关键词 shale gas enrichment mode tectonic evolution hydrocarbon source gas reservoir seal formation
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Large-scale gas accumulation mechanisms and reservoir-forming geological effects in sandstones of Central and Western China 被引量:1
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作者 LI Wei WANG Xueke +3 位作者 ZHANG Benjian CHEN Zhuxin PEI Senqi YU Zhichao 《Petroleum Exploration and Development》 2020年第4期714-725,共12页
Large-scale gas accumulation areas in large oil-gas basins in central and Western China have multiple special accumulation mechanisms and different accumulation effects.Based on the geological theory and method of nat... Large-scale gas accumulation areas in large oil-gas basins in central and Western China have multiple special accumulation mechanisms and different accumulation effects.Based on the geological theory and method of natural gas reservoir formation,this study examined the regional geological and structural background,formation burial evolution,basic characteristics of gas reservoirs,and fluid geology and geochemistry of typical petroliferous basins.The results show that the geological processes such as structural pumping,mudstone water absorption,water-soluble gas degasification and fluid sequestration caused by uplift and denudation since Himalayan stage all can form large-scale gas accumulation and different geological effects of gas accumulation.For example,the large-scale structural pumping effect and fluid sequestration effect are conducive to the occurrence of regional ultra-high pressure fluid and the formation of large-scale ultra-high pressure gas field;mudstone water absorption effect in the formation with low thickness ratio of sandstone to formation is conducive to the development of regional low-pressure and water free gas reservoir;the water-soluble gas degasification effect in large-scale thick sandstone can not only form large-scale natural gas accumulation;moreover,the degasification of water-soluble gas produced by the lateral migration of formation water will produce regional and regular isotopic fractionation effect of natural gas,that is,the farther the migration distance of water-soluble gas is,the heavier the carbon isotopic composition of methane formed by the accumulation. 展开更多
关键词 Central and Western China basins large-scale natural gas accumulation mechanism structural pumping effect mudstone water absorption effect water-soluble gas degasification effect fluid sequestration effect natural gas reservoir formation
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Selective synthesis of carbon monoxide via formates in reverse water–gas shift reaction over alumina-supported gold catalyst
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作者 Nobuhiro Ishito Kenji Hara +1 位作者 Kiyotaka Nakajima Atsushi Fukuoka 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第2期304-308,共5页
Thermal decomposition of formic acid on SiO2, CeO2 and γ-Al2O3 was studied as an elementary step of reverse water–gas shit reaction(RWGS) over supported Au catalysts. γ-Al2O3 showed the highest CO selectivity amo... Thermal decomposition of formic acid on SiO2, CeO2 and γ-Al2O3 was studied as an elementary step of reverse water–gas shit reaction(RWGS) over supported Au catalysts. γ-Al2O3 showed the highest CO selectivity among the tested oxides in the decomposition of formic acid. Infrared spectroscopy showed the formation of four formate species on γ-Al2O3: three η~1-type and one μ~2-type species, and these formates decomposed to CO at 473 K or higher. Au-loaded γ-Al2O3 samples were prepared by a depositionprecipitation method and used as catalysts for RWGS. The supported Au catalyst gave CO with high selectivity over 99% from CO2 and H2, which is attributed to the formation of formates on Au and subsequent decomposition to CO on γ-Al2O3. 展开更多
关键词 Reverse water–gas shift reaction Carbon dioxide Hydrogen Formate Carbon monoxide Alumina Gold
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