Formation of methane hydrate from water sorbed by anthracite: An investgation by low-field NMR relaxation

Turakhanov, A.H.; Shumskayte, M.Y.; Ildyakov, A. V.; Manakov, Andrey Yu.; Смирнов, В. Г.; Глинских, В.Н.; Дучков, А. Д.

doi:10.1016/j.fuel.2019.116656

Cited by 17 publications

(11 citation statements)

References 28 publications

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“…But recently the possibility of the hydrate formation from bound water in natural Fig. 1 Thermobaric conditions for some Russian coal basins in comparison with phase boundaries of hydrates of methane and its mixture with other gases (Smirnov 2014) coals was confirmed by experiments (Bustin et al 2015;Smirnov et al 2016Smirnov et al , 2018Smirnov et al , 2020Turakhanov et al 2020).…”

Section: Introductionmentioning

confidence: 93%

Temperature Dependencies of Compressional Wave Velocity and Attenuation in Hydrate-Bearing Coal Samples

2021

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Gas hydrates are widespread in nature. Hydrate-bearing sands are well studied due to their high permeability and potential as a new resource of natural gas. Other hydrate-bearing deposits are studied less, in spite of the fact that earlier it was hypothesized the possible presence of gas hydrates in coal. But the possibility of the formation of gas hydrate from bound water in coal was confirmed in experiments recently. This work considers the results of a series of experiments to study the acoustic properties of coal samples containing methane hydrate. As a result, the temperature dependence of compressional wave velocity and attenuation was revealed.

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Section: Introductionmentioning

confidence: 93%

Temperature Dependencies of Compressional Wave Velocity and Attenuation in Hydrate-Bearing Coal Samples

2021

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“…The gas hydrate showing a short T 2 cannot be identified because complete relaxation occurs before the first echo is detected [73]. Therefore, it is assumed that the NMR signals of hydrate and gas can be ignored by the LF-NMR [49,52,[54][55][56]66,69,70,74]. That is, the effective signals in the NMR T 2 measurement of gas hydrates are all from the water.…”

Section: Nmr T2 Relaxation Of Hydrate Water and Gasmentioning

confidence: 99%

“…Therefore, the NMR T 2 method is also widely used for monitoring the pore structure and the formation process of gas hydrate in sediments [45][46][47][48][49][50][51][52][53]. NMR T 2 is an effective method for microscopic detection of hydrate-bearing sediments with considerable advantages (e.g., fast response, high resolution, and no damage) in the quantitative analysis of gas hydrate in sediments by low-field NMR (LF-NMR) [54][55][56]. For instance, Minagawa et al [57] calculated the pore-size distribution of hydrate-bearing sediments using the transverse relaxation time (T 2 ).…”

Section: Introductionmentioning

confidence: 99%

Advances in Characterizing Gas Hydrate Formation in Sediments with NMR Transverse Relaxation Time

Liu

Zhan

et al. 2022

Water

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The formation process, structure, and distribution of gas hydrate in sediments have become focal points in exploring and exploiting natural gas hydrate. To better understand the dynamic behavior of gas hydrate formation in sediments, transverse relaxation time (T2) of nuclear magnetic resonance (NMR) is widely used to quantitatively characterize the formation process of gas hydrate and the change in pore characteristics of sediments. NMR T2 has been considered as a rapid and non-destructive method to distinguish the phase states of water, gas, and gas hydrate, estimate the saturations of water and gas hydrate, and analyze the kinetics of gas hydrate formation in sediments. NMR T2 is also widely employed to specify the pore structure in sediments in terms of pore size distribution, porosity, and permeability. For the recognition of the advantages and shortage of NMR T2 method, comparisons with other methods as X-ray CT, cryo-SEM, etc., are made regarding the application characteristics including resolution, phase recognition, and scanning time. As a future perspective, combining NMR T2 with other techniques can more effectively characterize the dynamic behavior of gas hydrate formation and pore structure in sediments.

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“…Today, low-field NMR is applied in various areas of science and industry. These are biotechnology and medicine [9], geophysical research [10], monitoring the distribution of cryogel in the environment when used to strengthen building structures in conditions of the Extreme North [11], studying the properties of hydrates of hydrocarbon gases, which are considered today as a promising hydrocarbon source [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Every year, the issue of effective development of fields with hard-to-recover oil reserves is becoming increasingly urgent, many NMR works being devoted to high-viscosity oils and oil-saturated shales [18][19][20][21]. Today, interest is also growing in unconventional natural gas reserves; active work is underway on creating a methodology for identifying the main stages of gas hydrate dissociation from their NMR characteristics [12,13,22,23]. For formation fluids (liquid hydrocarbons, formation water, etc.…”

Section: Introductionmentioning

confidence: 99%

Estimating Water Content in Water-oil Mixtures and Porous Media they Saturate: Joint Interpretation of NMR Relaxometry and Dielectric Spectroscopy

Shumskayte¹,

Mezin²,

Chernova³

et al. 2021

Preprint

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The article is devoted to the topical problem of estimating water content in water-oil mixtures and porous media they saturate, according to low-field NMR relaxometry and dielectric spectroscopy. The aim of the research is to theoretically substantiate and experimentally validate the capability of joint interpretation of data from these methods to acquire information on the filtration-volumetric properties of drill cuttings, relaxation characteristics of oil-containing fluids, water/oil ratio in water-oil mixtures and saturated with them drill cuttings in order to control the composition of liquids produced from boreholes. The studies were carried out on samples of cuttings and oils taken from fields in the northern and Arctic regions of the West Siberian oil-and-gas province. Based on the experimental data obtained, we evaluated the water content in the water-oil mixtures, determined the main NMR parameters of the mixtures in terms of properties of the constituent oils, and specified the parameters and shapes of NMR and complex dielectric permittivity spectra. The NMR method was found to be effective in examining high-viscosity and medium-viscosity oils, while the dielectric spectroscopy method – in the study of light oils; their integration allows obtaining reliable data for all the samples under study. We also showed how the shapes of NMR and complex dielectric permittivity spectra depend on the rheological properties of oil belonging to the mixture.

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Formation of methane hydrate from water sorbed by anthracite: An investgation by low-field NMR relaxation

Cited by 17 publications

References 28 publications

Temperature Dependencies of Compressional Wave Velocity and Attenuation in Hydrate-Bearing Coal Samples

Temperature Dependencies of Compressional Wave Velocity and Attenuation in Hydrate-Bearing Coal Samples

Advances in Characterizing Gas Hydrate Formation in Sediments with NMR Transverse Relaxation Time

Estimating Water Content in Water-oil Mixtures and Porous Media they Saturate: Joint Interpretation of NMR Relaxometry and Dielectric Spectroscopy

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