典型文献
Experimental study on characteristics of pore water conversion during methane hydrates formation in unsaturated sand
文献摘要：
Understanding the pore water conversion characteristics during hydrate formation in porous media is important to study the accumulation mechanism of marine gas hydrate. In this study, low-field NMR was used to study the pore water conversion characteristics during methane hydrate formation in unsaturated sand samples. Results show that the signal intensity of T2 distribution isn't affected by sediment type and pore pressure, but is affected by temperature. The increase in the pressure of hydrogen-containing gas can cause the increase in the signal intensity of T2 distribution. The heterogeneity of pore structure is aggravated due to the hydrate formation in porous media. The water conversion rate fluctuates during the hydrate formation. The sand size affects the water conversion ratio and rate by affecting the specific surface of sand in unsaturated porous media. For the fine sand sample, the large specific surface causes a large gas-water contact area resulting in a higher water conversion rate, but causes a large water-sand contact area resulting in a low water conversion ratio (Cw=96.2％). The clay can reduce the water conversion rate and ratio, especially montmorillonite (Cw=95.8％). The crystal layer of montmorillonite affects the pore water conversion characteristics by hindering the conversion of interlayer water.
文献关键词：
中图分类号：
作者姓名：
Yun-kai Ji;Chang-ling Liu;Zhun Zhang;Qing-guo Meng;Le-le Liu;Yong-chao Zhang;Neng-you Wu
作者机构：
Key Laboratory of Gas Hydrate,Ministry of Natural Resources,Qingdao Institute of Marine Geology,Qingdao 266237,China;Laboratory for Marine Mineral Resources,Pilot National Laboratory for Marine Science and Technology,Qingdao 266237,China;Faculty of Engineering,China University of Geosciences,Wuhan 430074,China
文献出处：
引用格式：
[1]Yun-kai Ji;Chang-ling Liu;Zhun Zhang;Qing-guo Meng;Le-le Liu;Yong-chao Zhang;Neng-you Wu-.Experimental study on characteristics of pore water conversion during methane hydrates formation in unsaturated sand)[J].中国地质（英文）,2022(02):276-284
A类：
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Experimental,study,characteristics,pore,water,conversion,during,methane,hydrates,formation,unsaturated,sand,Understanding,porous,media,important,accumulation,mechanism,marine,gas,In,this,low,field,NMR,was,used,samples,Results,show,that,signal,intensity,distribution,isn,affected,by,sediment,type,pressure,temperature,increase,hydrogen,containing,can,heterogeneity,structure,aggravated,due,fluctuates,size,affects,ratio,affecting,specific,surface,For,fine,large,causes,contact,area,resulting,higher,Cw,clay,reduce,especially,montmorillonite,crystal,hindering,interlayer
AB值：
0.39032
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