Effect of Temperature Gradient on Process of Methane Hydrate Formation-dissociation and Its Resistivity Changes in Coarse Sand
Received date: 2011-09-06
Revised date: 2011-11-01
Online published: 2012-02-10
It is important for methane hydrate exploration in the permafrost region to evaluate the resistivity changes during the process of methane hydrate formation and decomposition of gas hydrate.In this paper,we use the devices of frozen phase transition temperature and resistivity distribution which are self designed to elucidate the methane hydrate formation and decomposition process in the coarse sand.The experimental results show that the processes of hydrate nucleation,formation,aggregation and decomposition can be detected accurately and efficiently by the experimental devices.The differences temperature gradients obviously influence the formation and distribution of the methane hydrate in the coarse sand.With increase of temperature gradient,the distribution of the methane hydrate becomes uneven.The methane hydrate is aggregated more easily at the apex of high-temperature while the time interval of the hydrate aggregation is shorter.The resistivity of the samples increased with increase of hydrate saturation.
Key words: Methane hydrate; Temperature gradient; Resistivity; Coarse sand; Hydrate saturation.
WANG Yang-Mei, WU Qing-Bai, PU Yi-Ban, ZHAN Jing . Effect of Temperature Gradient on Process of Methane Hydrate Formation-dissociation and Its Resistivity Changes in Coarse Sand[J]. Natural Gas Geoscience, 2012 , 23(1) : 19 -25 . DOI: 10.11764/j.issn.1672-1926.2012.01.19
[1]Wang Shuhong,Song Haibin,Yan Wen.The change of external conditions effects on the phase equilibrium curve of gas hydrate and the thickness of hydrate stability zone[J].Chinese Journal Geophysics,2005,20(3):761-768.[王淑红,宋海斌,颜文.外界条件变化对天然气水合物相平衡曲线及稳定带厚度的影响[J].地球物理学进展,2005,20(3):761-768.]
[2]Bower P G.Deep ocean field tests of methane hydrate formation from a remotely operated vehicle[J].Geology,1997,25:407-410.
[3]Chuvilin E M,Yakushev V S,Perlova E V.Experimental study of gas hydrate formation in porous media[J].Vniigan,1999,9:431-440.
[4]Wu Baoxiang,Duan Yi,Lei Huaiyan,et al.Filling rates of methane hydrate in water-sediment system[J].Natural Gas Industry,2004,24(8):27-29.[吴保祥,段毅,雷怀彦,等.水+沉积物体系中CH4水合物的填充率[J].天然气工业,2004,24(8):27-29.]
[5]Chen Min,Cao Zhimin,Ye Yuguang.Experimental technology on elemental geochemical study during the formation of marine gas hydrates[J].Acta Oceanologica Sinica,2006,28(6):39-43.[陈敏,曹志敏,业渝光.海洋天然气水合物合成的模拟实验研究[J].海洋学报,2006,28(6):39-43.]
[6]Hyndman R D,Yuan T,Mo ran K.The concentration of deep sea gas hydrates from down hole electrical resistivity logs and laboratory data[J].Earth and Planetary Science Letters,1999,172: 167-177.
[7]Pearson C F,Halleck P M,McGuire P L.Natural gas hydrate: A review of in situ properties[J].Journal of Physical Chemistry,1983,87:4180-4185.
[8]Spangenberg E,Kulenkampff J.Influence of methane hydrate contention electrical sediment properties[J].Geophysical Research Letters,2006,33: 243-251.
[9]Buffett B A,Zatsepina O Y.Experiment study of the stability of CO2-hydrate in a porous medium[J].Fluid Phase Equilibria,2001,192:85-102.
[10]Zatsepina O Y,Buffett B A.Nucleation of CO2-hydrate in a porous medium[J].Fluid Phase Equilibria,2002,5012:1-13.
[11]Zhou Xitang,Fan Shuanshi,Liang Deqing.Deteching formation and decomposition of NGH by measuring conductivity[J].Natural Gas Geoscience,2007,18(4):593-595.[周锡堂,樊栓狮,梁德青.用电导性监测天然气水合物的形成和分解[J].天然气地球科学,2007,18(4):593-595.]
[12]Zhao Hongwei,Diao Shaobo,Ye Yuguang,et al.Technique of detecting impedance of hydrate in porous medium[J].Marine Geology & Quaternary Geology,2005,25(1):137-142.[赵宏伟,刁少波,业渝光,等.多孔介质中水合物阻抗探测技术[J].海洋地质与第四纪地质,2005,25(1):137-142.]
[13]Chen Qiang,Ye Yuguang,Meng Qingguo,et al.Simulation experiment of the relationship between CO2 hydrate saturation and resistance in porous media[J].Natural Gas Geoscience,2009,20(2):249-253.[陈强,业渝光,孟庆国,等.多孔介质中CO2水合物饱和度与阻抗关系模拟实验研究[J].天然气地球科学,2009,20(2):249-253.]
[14]Stern L A,Kirby S H.Scanning electron microscopy investigations of laboratory-grown gas clathrate hydrates formed from melting ice,and comparison to natural hydrates[J].American Mineralogist,2004,89:1162-1175.
[15]Wang Yingmei,Wu Qingbai,Zhang Peng,et al.Experimental study on the isobaric decomposition of methane hydrate
[J].Natural Gas Geoscience,2009,20(2):244-248.
[ 王英梅,吴青柏,张鹏,等,冰点以下甲烷水合物等压分解实验研究
[J].天然气地球科学,2009,20(2) :244-248.]
[16]Wu Qingbai,Pu Yibin,Jiang Guanli.Experimental research of formation and decomposition processes of methane hydrate by computerized tomography[J].Progress in Natural Science,2006,16(1):61-65.[吴青柏,蒲毅彬,蒋观利.X射线断层扫描系统研究CH4水合物形成和分解过程[J].自然科学进展.2006,16(1):61-65.]
[17]Zhang Peng,Wu Qingbai,Wang Yingmei.Water characteristics inside loess during formation and dissociation processes of methane hydrate
[J].Natural Gas Geoscience,2009,20(4):616-619,626.
[张鹏,吴青柏,王英梅.粉土内甲烷水合物形成与分解过程中的水分特征
[J].天然气地球科学,2009,20(4):616-619,626.]
[18]Li Shuxia,Chen Yueming,Wang Ruihe,et al.On the influence of initial pressure on natural gas hydrate formation in a porous medium[J].Journal of Experimental Mechanics,2009,24(4):313-319.[李淑霞,陈月明,王瑞和,等,初始压力对多孔介质中气体水合物生成的影响[J].实验力学,2009,24(4):313-319.]
[19]Chen Xinzhi,Cai Zhengyun,Hu Wangming,et al.Chemical Engineering Thermodynamics:First Edition[M].Beijing:Chemical Industry Press,2009:43-44.[陈新志,蔡振云,胡望明,等.化工热力学:第一版[M].北京:化学工业出版社,2009:43-44.]
[20]Chen Qiang,Liu Changling,Ye Yuguang.Preliminary research about the nucleation of gas hydrate in porous media[J].Acta Petrolei Sinica:Petroleum Processing Section,2008,24(3):345-349.[陈强,刘昌岭,业渝光.多孔介质中气体水合物的成核研究[J].石油学报:石油加工,2008,24(3):345-349.]
/
〈 |
|
〉 |