Laboratory Investigation Into the Formation and Dissociation Process of Gas Hydrate by Low‐Field NMR Technique
We monitored the gas hydrate through low‐field nuclear magnetic resonance measurement. An observed decrease of the relaxation time (T2) intensity corresponds to the formation process, whereas an increase of the intensity corresponds to the dissociation process. The right domain of the spectrum with...
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Veröffentlicht in: | Journal of geophysical research. Solid earth 2018-05, Vol.123 (5), p.3339-3346 |
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creator | Ge, Xinmin Liu, Jianyu Fan, Yiren Xing, Donghui Deng, Shaogui Cai, Jianchao |
description | We monitored the gas hydrate through low‐field nuclear magnetic resonance measurement. An observed decrease of the relaxation time (T2) intensity corresponds to the formation process, whereas an increase of the intensity corresponds to the dissociation process. The right domain of the spectrum with T2 larger than 10 ms disappears gradually with the formation time, whereas the left domain with T2 smaller than 1 ms remains invariant, indicating the gas hydrate forms preferentially in larger pores. In addition, the right domain increases rapidly with the dissociation time, revealing that the gas hydrate preferentially decomposes in large pores. The spectrum distributions move toward the fast relaxation domain with the growth of gas hydrate, because the generated gas hydrate occupies the large pore and accelerate the relaxation rate. There is no obvious relationship between the gas hydrate saturation and the porosity, whereas the volume and preliminary dissociation ratio are strongly correlated with the porosity.
Key Points
An equipment to form the methane gas hydrate in porous rock is developed
Low‐field NMR responses of the gas hydrate bearing samples are measured and analyzed during the formation and dissociation processes
The formation and dissociate behaviors and habits for gas hydrate bearing samples are investigated |
doi_str_mv | 10.1029/2017JB014705 |
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Key Points
An equipment to form the methane gas hydrate in porous rock is developed
Low‐field NMR responses of the gas hydrate bearing samples are measured and analyzed during the formation and dissociation processes
The formation and dissociate behaviors and habits for gas hydrate bearing samples are investigated</description><identifier>ISSN: 2169-9313</identifier><identifier>EISSN: 2169-9356</identifier><identifier>DOI: 10.1029/2017JB014705</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Dissociation ; formation and dissociation ; Gas hydrate ; Gas hydrates ; Geophysics ; Hydrates ; low field NMR ; Magnetic resonance ; NMR ; Nuclear magnetic resonance ; Pores ; Porosity ; Relaxation time ; Saturation ; Shear strength ; T2 spectrum</subject><ispartof>Journal of geophysical research. Solid earth, 2018-05, Vol.123 (5), p.3339-3346</ispartof><rights>2018. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a3731-8a56bbffddafe7c2a0bd444e01a2560ebb7a6520d5eee5a37994ce21a52b04803</citedby><cites>FETCH-LOGICAL-a3731-8a56bbffddafe7c2a0bd444e01a2560ebb7a6520d5eee5a37994ce21a52b04803</cites><orcidid>0000-0003-2950-888X ; 0000-0001-7995-4146 ; 0000-0001-6196-8654</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2017JB014705$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2017JB014705$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,1427,27901,27902,45550,45551,46384,46808</link.rule.ids></links><search><creatorcontrib>Ge, Xinmin</creatorcontrib><creatorcontrib>Liu, Jianyu</creatorcontrib><creatorcontrib>Fan, Yiren</creatorcontrib><creatorcontrib>Xing, Donghui</creatorcontrib><creatorcontrib>Deng, Shaogui</creatorcontrib><creatorcontrib>Cai, Jianchao</creatorcontrib><title>Laboratory Investigation Into the Formation and Dissociation Process of Gas Hydrate by Low‐Field NMR Technique</title><title>Journal of geophysical research. Solid earth</title><description>We monitored the gas hydrate through low‐field nuclear magnetic resonance measurement. An observed decrease of the relaxation time (T2) intensity corresponds to the formation process, whereas an increase of the intensity corresponds to the dissociation process. The right domain of the spectrum with T2 larger than 10 ms disappears gradually with the formation time, whereas the left domain with T2 smaller than 1 ms remains invariant, indicating the gas hydrate forms preferentially in larger pores. In addition, the right domain increases rapidly with the dissociation time, revealing that the gas hydrate preferentially decomposes in large pores. The spectrum distributions move toward the fast relaxation domain with the growth of gas hydrate, because the generated gas hydrate occupies the large pore and accelerate the relaxation rate. There is no obvious relationship between the gas hydrate saturation and the porosity, whereas the volume and preliminary dissociation ratio are strongly correlated with the porosity.
Key Points
An equipment to form the methane gas hydrate in porous rock is developed
Low‐field NMR responses of the gas hydrate bearing samples are measured and analyzed during the formation and dissociation processes
The formation and dissociate behaviors and habits for gas hydrate bearing samples are investigated</description><subject>Dissociation</subject><subject>formation and dissociation</subject><subject>Gas hydrate</subject><subject>Gas hydrates</subject><subject>Geophysics</subject><subject>Hydrates</subject><subject>low field NMR</subject><subject>Magnetic resonance</subject><subject>NMR</subject><subject>Nuclear magnetic resonance</subject><subject>Pores</subject><subject>Porosity</subject><subject>Relaxation time</subject><subject>Saturation</subject><subject>Shear strength</subject><subject>T2 spectrum</subject><issn>2169-9313</issn><issn>2169-9356</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kE1OwzAQhSMEElXpjgNYYkvAduw4WdJC_xR-VJV1ZCcT6qqNi51SZccROCMnwSgIsWI2M_P0zTzpBcE5wVcE0_SaYiLmQ0yYwPwo6FESp2Ea8fj4dybRaTBwbo19JV4irBfsMqmMlY2xLZrVb-Aa_SIbbWq_NQY1K0BjY7edJOsS3WrnTKE74cmaApxDpkIT6dC0Lf0rQKpFmTl8vn-MNWxK9HC_QEsoVrV-3cNZcFLJjYPBT-8Hz-O75WgaZo-T2egmC2UkIhImksdKVVVZygpEQSVWJWMMMJGUxxiUEjLmFJccALi_SVNWACWSU4VZgqN-cNH93VnjbV2Tr83e1t4yp5gLJhLBmacuO6qwxjkLVb6zeittmxOcf8ea_43V41GHH_QG2n_ZfD5ZDDmNBYm-AHAeej8</recordid><startdate>201805</startdate><enddate>201805</enddate><creator>Ge, Xinmin</creator><creator>Liu, Jianyu</creator><creator>Fan, Yiren</creator><creator>Xing, Donghui</creator><creator>Deng, Shaogui</creator><creator>Cai, Jianchao</creator><general>Blackwell Publishing Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TG</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0003-2950-888X</orcidid><orcidid>https://orcid.org/0000-0001-7995-4146</orcidid><orcidid>https://orcid.org/0000-0001-6196-8654</orcidid></search><sort><creationdate>201805</creationdate><title>Laboratory Investigation Into the Formation and Dissociation Process of Gas Hydrate by Low‐Field NMR Technique</title><author>Ge, Xinmin ; Liu, Jianyu ; Fan, Yiren ; Xing, Donghui ; Deng, Shaogui ; Cai, Jianchao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a3731-8a56bbffddafe7c2a0bd444e01a2560ebb7a6520d5eee5a37994ce21a52b04803</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Dissociation</topic><topic>formation and dissociation</topic><topic>Gas hydrate</topic><topic>Gas hydrates</topic><topic>Geophysics</topic><topic>Hydrates</topic><topic>low field NMR</topic><topic>Magnetic resonance</topic><topic>NMR</topic><topic>Nuclear magnetic resonance</topic><topic>Pores</topic><topic>Porosity</topic><topic>Relaxation time</topic><topic>Saturation</topic><topic>Shear strength</topic><topic>T2 spectrum</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ge, Xinmin</creatorcontrib><creatorcontrib>Liu, Jianyu</creatorcontrib><creatorcontrib>Fan, Yiren</creatorcontrib><creatorcontrib>Xing, Donghui</creatorcontrib><creatorcontrib>Deng, Shaogui</creatorcontrib><creatorcontrib>Cai, Jianchao</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>Journal of geophysical research. Solid earth</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ge, Xinmin</au><au>Liu, Jianyu</au><au>Fan, Yiren</au><au>Xing, Donghui</au><au>Deng, Shaogui</au><au>Cai, Jianchao</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Laboratory Investigation Into the Formation and Dissociation Process of Gas Hydrate by Low‐Field NMR Technique</atitle><jtitle>Journal of geophysical research. Solid earth</jtitle><date>2018-05</date><risdate>2018</risdate><volume>123</volume><issue>5</issue><spage>3339</spage><epage>3346</epage><pages>3339-3346</pages><issn>2169-9313</issn><eissn>2169-9356</eissn><abstract>We monitored the gas hydrate through low‐field nuclear magnetic resonance measurement. An observed decrease of the relaxation time (T2) intensity corresponds to the formation process, whereas an increase of the intensity corresponds to the dissociation process. The right domain of the spectrum with T2 larger than 10 ms disappears gradually with the formation time, whereas the left domain with T2 smaller than 1 ms remains invariant, indicating the gas hydrate forms preferentially in larger pores. In addition, the right domain increases rapidly with the dissociation time, revealing that the gas hydrate preferentially decomposes in large pores. The spectrum distributions move toward the fast relaxation domain with the growth of gas hydrate, because the generated gas hydrate occupies the large pore and accelerate the relaxation rate. There is no obvious relationship between the gas hydrate saturation and the porosity, whereas the volume and preliminary dissociation ratio are strongly correlated with the porosity.
Key Points
An equipment to form the methane gas hydrate in porous rock is developed
Low‐field NMR responses of the gas hydrate bearing samples are measured and analyzed during the formation and dissociation processes
The formation and dissociate behaviors and habits for gas hydrate bearing samples are investigated</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2017JB014705</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-2950-888X</orcidid><orcidid>https://orcid.org/0000-0001-7995-4146</orcidid><orcidid>https://orcid.org/0000-0001-6196-8654</orcidid></addata></record> |
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subjects | Dissociation formation and dissociation Gas hydrate Gas hydrates Geophysics Hydrates low field NMR Magnetic resonance NMR Nuclear magnetic resonance Pores Porosity Relaxation time Saturation Shear strength T2 spectrum |
title | Laboratory Investigation Into the Formation and Dissociation Process of Gas Hydrate by Low‐Field NMR Technique |
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