DISSOCIATION

作品数：371被引量：393H指数：8
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Microscopic experimental study on the effects of NaCl concentration on the self-preservation effect of methane hydrates under 268.15 K
《Chinese Journal of Chemical Engineering》2024年第9期1-14,共14页Yu-Jie Zhu Yu-Zhou Chen Yan Xie Jin-Rong Zhong Xiao-Hui Wang Peng Xiao Yi-Fei Sun Chang-Yu Sun Guang-Jin Chen 
financial support received from the Basic Research Program of Qinghai Province(2023-ZJ-703);the National Natural Science Foundation of China(22178379,42206223);the National Key Research and Development Programof China(2021YFC2800902)is gratefully acknowledged.
It is known that salt ions are abundant in the natural environment where natural gas hydrates are located;thus,it is essential to investigate the self-preservation effect of salt ions on methane hydrates.The dissociat...
关键词：Gas hydrate SELF-PRESERVATION SALINITY In situ Raman spectroscopy Endothermic behavior DISSOCIATION 
Nuclear magnetic resonance study of the formation and dissociation process of nature gas hydrate in sandstone
《China Geology》2022年第4期630-636,共7页Dong-hui Xing Xu-wen Qin Hai-jun Qiu Hong-feng Lu Yi-ren Fan Xin-min Ge Cheng Lu Jin-wen Du 
supported by the Guangdong Province Marine Economic Development(Six Major Marine Industries)Special Fund Project([2021]56);the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(GML2019ZD0105);the Guangzhou Science and Technology Project(202201011463);project of the China Geological Survey(DD20211350).
In this work,the authors monitored the formation and dissociation process of methane hydrate in four different rock core samples through nuclear magnetic resonance(NMR)relaxation time(T_(2))and 2D imaging measurement....
关键词：Nature gas hydrates(NGHs) Methane hydrate Nuclear magnetic resonance(NMR) Magnetic resonance imaging(MRI) Formation and dissociation Saturation Berea sandstone Marine hydrates production test Oil and gas exploration engineering 
Downward shift of gas hydrate stability zone due to seafloor erosion in the eastern Dongsha Island,South China Sea被引量：8
《Journal of Oceanology and Limnology》2020年第4期1188-1200,共13页JIN Jiapeng WANG Xiujuan HE Min LI Jie YAN Chengzhi LI Yuanping ZHOU Jilin QIAN Jin 
the National Key R&D Program of China(No.2017YFC0307301-1);the National Natural Science Foundation of China(No.41676041);the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(No.GML2019ZD0104);the National High Technology Research and Development Program of China(863 Program)(No.2013AA092601)。
New acquired and reprocessed three-dimensional(3D)seismic data were used to delineate the distribution and characterization of bottom simulating reflections(BSRs)in the Chaoshan Sag,in the eastern part of Dongsha Isla...
关键词：bottom simulating reflections(BSRs) downward shift seafloor erosion gas hydrate dissociation 
Metastable state of gas hydrate during decomposition: A novel phenomenon被引量：2
《Chinese Journal of Chemical Engineering》2020年第4期949-954,共6页Ronghui Sun Zhen Fan Lei Yang Yuanping Li Xin Lü Yang Miao 
supported by the National Key R&D Program of China(Grant Nos.2018YFC0310006 and 2017YFC0307300);the National Natural Science Foundation of China(Grant Nos.51806027 and 51890911);PetroChina Innovation Foundation。
Natural gas hydrates are solid compounds with cage-like structures formed by gas and water.An intriguing phenomenon that gas hydrates can dissociate at a low rate below the ice freezing point has been viewed as the me...
关键词：HYDRATES DISSOCIATION METASTABILITY SELF-PRESERVATION SUPERSATURATION 
Mechanical properties of gas hydrate-bearing sediments during hydrate dissociation被引量：13
《Acta Mechanica Sinica》2018年第2期266-274,共9页X.H.Zhang D.S.Luo X.B.Lu L.L.Liu C.L.Liu 
supported by the National Natural Science Foundation of China(Grants 41376078,51639008,and 51239010);the China Geological Survey(Grant DD20160216);the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant 2017027)
The changes in the mechanical properties of gas hydrate-bearing sediments(GHBS) induced by gas hydrate(GH) dissociation are essential to the evaluation of GH exploration and stratum instabilities. Previous studies pre...
关键词：Gas hydrate-bearing sediments DISSOCIATION Mechanical properties Shear strength Triaxial test 
Numerical study on the deformation of soil stratum and vertical wells with gas hydrate dissociation被引量：5
《Acta Mechanica Sinica》2016年第5期905-914,共10页Xudong Chen Xuhui Zhang Xiaobing Lu Wei Wei Yaohong Shi 
supported by the National Natural Science Foundation of China (Grants 11272314, 51239010, 41376078);a joint project of the Chinese National Petroleum Corporation and the Chinese Academy of Sciences (Grant 2015A-4813);a project of the China Geological Survey (Grant GZH201100311)
Gas hydrate（GH） dissociates owing to thermal injection or pressure reduction from the well in gas/oil or GH exploitation. GH dissociation leads to, for example, decreases in soil strength, engineering failures such ...
关键词：Gas hydrate DISSOCIATION FLAC3D Soil stratum WELL 
Meso-level simulation of gas hydrate dissociation in low-permeability sediments
《Theoretical & Applied Mechanics Letters》2014年第6期35-41,共7页Jianhong Zhang Chao Zhao Zhongsheng Xiong 
supported by the National Basic Research Program of China(2013CB035902);the National Natural Science Foundation of China(51038007);the State Key Laboratory of Hydroscience and Engineering Project(2013-KY-04 and 2014-KY-03)
This paper presents a meso-level simulation of gas hydrate dissociation in low-permeability marine sediments. Interstitial pores are defined to describe fluid flow and particle movement. The proposed model couples mul...
关键词：gas hydrate dissociation particle movements pore pressure discrete elementmodel 
Lipid Distribution in Marine Sediments from the Northern South China Sea and Association with Gas Hydrate被引量：4
《Acta Geologica Sinica(English Edition)》2014年第1期226-237,共12页OU Wenjia LEI Huaiyan LU Wanjun ZHANG Jie SHI Chunxiao GONG Chujun HAN Chao 
supported by the National Major Fundamental Research and Development Project of China (No. 2009CB219501);the National Natural Science Foundation of China (No. 40976035 and No. 41276046)
The distributions of lipids in surface and subsurface sediments from the northern South China Sea were determined. The n-alkanes were in bimodal distribution that is characterized by a centre at n-C16 –n-C20 with max...
关键词：SEDIMENTS N-ALKANES fatty acid methyl esters gas hydrate dissociation northern South China Sea 
Numerical studies of hydrate dissociation and gas production behavior in porous media during depressurization process被引量：4
《Journal of Natural Gas Chemistry》2012年第4期381-392,共12页Xuke Ruan Mingjun Yang Yongchen Song Haifeng Liang Yanghui Li 
supported by the National Science and Technology Major Project,China (Grant No. 2011ZX05026-004-07);the National High Technology Research and Development Program of China (863 Program,Grant No. 2006AA09209-5);Major State Basic Research Development Program of China (973 Program,Grant No. 2009CB219507)
In this study, a numerical model is developed to investigate the hydrate dissociation and gas production in porous media by depressurization. A series of simulation runs are conducted to study the impacts of permeabil...
关键词：gas hydrate numerical simulation PERMEABILITY DISSOCIATION gas production DEPRESSURIZATION 
Thermally induced evolution of phase transformations in gas hydrate sediment被引量：8
《Science China(Physics,Mechanics & Astronomy)》2010年第8期1530-1535,共6页ZHANG XuHui LU XiaoBing LI QingPing YAO HaiYuan 
supported by the National High Technology Research and Development Program of China (Grant N. 2006AA09A209-7);the Major Oil and Gas Program of China (Grant No. 2008ZX05026-04-011);Knowledge Innovative Program of the Chinese Academy of Sciences (Grant No. KJCX2-YW-L02);the National Natural Science Foundation of China (Grant No. 1077218)
Thermally induced evolution of phase transformations is a basic physical-chemical process in the dissociation of gas hydrate in sediment (GHS). Heat transfer leads to the weakening of the bed soil and the simultaneous...
关键词：gas hydrate dissociation front phase transformation thermal conduction 
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