Laboratory investigations into the velocities and attenuation of ultrasonic waves in sand samples containing water/ice and methane and tetrahydrofuran hydrates

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Laboratory investigations into the velocities and attenuation of ultrasonic waves in sand samples containing water/ice and methane and tetrahydrofuran hydrates. / Duchkov, A. D.; Dugarov, G. A.; Duchkov, A. A. et al.

In: Russian Geology and Geophysics, Vol. 60, No. 2, 02.2019, p. 193-203.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{9fd3a0ee71c84bcdb4ebc953b536b356,

title = "Laboratory investigations into the velocities and attenuation of ultrasonic waves in sand samples containing water/ice and methane and tetrahydrofuran hydrates",

abstract = "The paper considers the results of a series of laboratory experiments (more than 100) on the formation of synthetic sand samples containing water/ice and methane or tetrahydrofuran hydrates in the pore space and of the measurement of their acoustic properties (velocities and attenuation of acoustic waves). The main aim of the experiments was to establish the relationship between the velocities of acoustic waves and the ice or hydrate saturation of the samples. An increase in the content of ice and hydrates always leads to a velocity increase. However, the rate of the velocity increase is determined by the localization of ice and hydrates in the samples: at the contacts between the sand grains (“cementing” model) or in the pore space (“filling” model). It has been established that the “cementing” model, characterized by a drastic initial increase in velocities, works for ice or gas hydrates formed from free methane and localized in the pores. On the contrary, tetrahydrofuran hydrates form by the “filling” model and cause a slow increase in velocities.",

keywords = "Acoustic properties, Laboratory measurements, Methane and tetrahydrofuran hydrates, Velocities and attenuation, Water/ice-containing sand samples, methane and tetrahydrofuran hydrates, GAS HYDRATE, SEDIMENTS, laboratory measurements, SEISMIC VELOCITIES, ACOUSTIC PROPERTIES, ELASTICITY, velocities and attenuation, BEARING SAND, water/ice-containing sand samples, acoustic properties",

author = "Duchkov, {A. D.} and Dugarov, {G. A.} and Duchkov, {A. A.} and Drobchik, {A. A.}",

year = "2019",

month = feb,

doi = "10.15372/RGG2019015",

language = "English",

volume = "60",

pages = "193--203",

journal = "Russian Geology and Geophysics",

issn = "1068-7971",

publisher = "Elsevier Science B.V.",

number = "2",

}

RIS

TY - JOUR

T1 - Laboratory investigations into the velocities and attenuation of ultrasonic waves in sand samples containing water/ice and methane and tetrahydrofuran hydrates

AU - Duchkov, A. D.

AU - Dugarov, G. A.

AU - Duchkov, A. A.

AU - Drobchik, A. A.

PY - 2019/2

Y1 - 2019/2

N2 - The paper considers the results of a series of laboratory experiments (more than 100) on the formation of synthetic sand samples containing water/ice and methane or tetrahydrofuran hydrates in the pore space and of the measurement of their acoustic properties (velocities and attenuation of acoustic waves). The main aim of the experiments was to establish the relationship between the velocities of acoustic waves and the ice or hydrate saturation of the samples. An increase in the content of ice and hydrates always leads to a velocity increase. However, the rate of the velocity increase is determined by the localization of ice and hydrates in the samples: at the contacts between the sand grains (“cementing” model) or in the pore space (“filling” model). It has been established that the “cementing” model, characterized by a drastic initial increase in velocities, works for ice or gas hydrates formed from free methane and localized in the pores. On the contrary, tetrahydrofuran hydrates form by the “filling” model and cause a slow increase in velocities.

AB - The paper considers the results of a series of laboratory experiments (more than 100) on the formation of synthetic sand samples containing water/ice and methane or tetrahydrofuran hydrates in the pore space and of the measurement of their acoustic properties (velocities and attenuation of acoustic waves). The main aim of the experiments was to establish the relationship between the velocities of acoustic waves and the ice or hydrate saturation of the samples. An increase in the content of ice and hydrates always leads to a velocity increase. However, the rate of the velocity increase is determined by the localization of ice and hydrates in the samples: at the contacts between the sand grains (“cementing” model) or in the pore space (“filling” model). It has been established that the “cementing” model, characterized by a drastic initial increase in velocities, works for ice or gas hydrates formed from free methane and localized in the pores. On the contrary, tetrahydrofuran hydrates form by the “filling” model and cause a slow increase in velocities.

KW - Acoustic properties

KW - Laboratory measurements

KW - Methane and tetrahydrofuran hydrates

KW - Velocities and attenuation

KW - Water/ice-containing sand samples

KW - methane and tetrahydrofuran hydrates

KW - GAS HYDRATE

KW - SEDIMENTS

KW - laboratory measurements

KW - SEISMIC VELOCITIES

KW - ACOUSTIC PROPERTIES

KW - ELASTICITY

KW - velocities and attenuation

KW - BEARING SAND

KW - water/ice-containing sand samples

KW - acoustic properties

UR - http://www.scopus.com/inward/record.url?scp=85065620485&partnerID=8YFLogxK

U2 - 10.15372/RGG2019015

DO - 10.15372/RGG2019015

M3 - Article

AN - SCOPUS:85065620485

VL - 60

SP - 193

EP - 203

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 2

ER -

ID: 20047134