Gas production from layered methane hydrate reservoirs

Bhade, Piyush; Phirani, Jyoti

doi:10.1016/j.energy.2015.01.077

Cited by 82 publications

(26 citation statements)

References 25 publications

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“…The heterogeneity of gas hydrate reservoir is one of the geological factors that affect the hydrate recovery (Bhade & Phirani, 2015). At present, relevant researches mainly focus on the distribution of gas hydrate and the spatial variation of lithology in the reservoir (Boswell et al, 2011;Noguchi et al, 2011).…”

Section: Methodsmentioning

confidence: 99%

Study on the Effects of Heterogeneous Distribution of Methane Hydrate on Permeability of Porous Media Using Low‐Field NMR Technique

Hou

Zhao

et al. 2020

JGR Solid Earth

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The permeability of sediments is an important parameter that effects flow characteristics of the gas and water in the process of natural gas hydrates development. The distribution of gas hydrate is generally heterogeneous in porous media. It poses a great challenge to the permeability measurement of hydrate‐bearing sediments. To study the effect of heterogeneous distribution of methane hydrate on the permeability of porous media, methane hydrate formation in the sandstone and permeability measurement was carried out using a low‐field nuclear magnetic resonance (NMR) measurement system in situ conditions. The spatial distribution of methane hydrate in the core samples was determined by combining the T2 distribution with magnetic resonance imaging. The results show that the distribution of methane hydrate is heterogeneous in the core samples. The temporal and spatial variation of permeability happens in the process of hydrate dissociation. The heterogeneity of methane hydrate distribution severely affects the analysis of permeability change. Considering the heterogeneity of methane hydrate distribution, a new method was proposed to obtain the quantitative relationship between hydrate saturation and relative permeability based on magnetic resonance imaging and the equivalent seepage capacity method. The results show that the relative permeability models obtained by this method agree better with experimental results. The optimum coefficients of relative permeability models obtained by equivalent seepage capacity method change significantly in contrast with the direct fitting method. The variation of the optimum coefficient is up to 300% in this study. The model coefficients are related to the pore characteristic of hydrate‐free porous media.

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Section: Methodsmentioning

confidence: 99%

Study on the Effects of Heterogeneous Distribution of Methane Hydrate on Permeability of Porous Media Using Low‐Field NMR Technique

Hou

Zhao

et al. 2020

JGR Solid Earth

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“…Class 1 deposits include an upper layer (the hydrate layer) and the lower layer of free gas in a two‐phase flow; hydrate accumulations in the North Slope in Alaska are an example . Class 2 deposits include the upper (hydrate) layer and a lower layer consisting of free mobile water; a part of the eastern Nankai Trough of Japan is an example . Class 3 deposits include only a single hydrate layer that is not connected with other mobile layers; part of the Mallik site is an example of this .…”

Section: Introductionmentioning

confidence: 99%

“…Class 3 deposits include only a single hydrate layer that is not connected with other mobile layers; part of the Mallik site is an example of this . Class 4 deposits include a layer of low (<10%) methane hydrate saturation with no impermeable layers, such as the Krishna Godavari Basin in India . Gas and hydrate distributions differ among the classes of NGH deposits, and the liquid, gas, and production characteristics during exploitation vary among them.…”

Section: Introductionmentioning

confidence: 99%

Gas production from different classes of methane hydrate deposits by the depressurization method

et al. 2019

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Summary There are four primary classes of natural gas hydrate deposits in natural world. The differences between them are in the distribution of the methane hydrate, free gas, and free water layers. A reactor which the height was 120 mm and the inner diameter was 103 mm was used in hydrate formation and dissociation, and 17 thermocouples measured the distribution of temperature during the mining process. Different experimental means were applied to simulate three classes of methane hydrate deposits, in which water and glass beads filled in different orders. The hydrate samples were dissociated by depressurization, and the results showed no need to test a backpressure greater than 94% of the equilibrium pressure of methane hydrate. Class 1 sample's methane hydrate decomposition rate was slower than that of class 3 sample at the beginning of depressurization when backpressure was 2.3 and 2.6 MPa, but then, the opposite happened. The average dissociation rate decreased nearly linearly with the increase in backpressure for the class 1 samples.

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“…This complex behaviour, if not identified before the production will affect the flow of fluids towards the well compelling revisions in the production strategies for efficient recovery. Bhade and Phirani (2015) showed that for two layered hydrate reservoir the gas recovery and recovery rate for hydrate reservoirs depend on the total volume of hydrate present in the reservoir, depressurisation potential and enthalpy available from surroundings irrespective of the layering. In the present work we have studied a multi-layered hydrate reservoir with cross-flow between the layers.…”

Section: Introductionmentioning

confidence: 99%

Effect of geological layers on hydrate dissociation in natural gas hydrate reservoirs

Bhade

Phirani

2015

Journal of Natural Gas Science and Engineering

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Gas production from layered methane hydrate reservoirs

Cited by 82 publications

References 25 publications

Study on the Effects of Heterogeneous Distribution of Methane Hydrate on Permeability of Porous Media Using Low‐Field NMR Technique

Study on the Effects of Heterogeneous Distribution of Methane Hydrate on Permeability of Porous Media Using Low‐Field NMR Technique

Gas production from different classes of methane hydrate deposits by the depressurization method

Effect of geological layers on hydrate dissociation in natural gas hydrate reservoirs

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