Simulation of CO2 storage and methane gas production from gas hydrates in a large scale laboratory reactor

Castellani, Beatrice; Rossetti, Giacomo G.; Tupsakhare, Swanand S.; Rossi, Federico; Nicolini, Andrea; Castaldi, Marco J.

doi:10.1016/j.petrol.2016.09.016

Cited by 63 publications

(29 citation statements)

References 29 publications

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“…m h mass rate by hydrate dissociated per unit volume (kg/(m 3 ·s)) M g molecular weight of gas (kg/kmol) M w molecular weight of water (kg/kmol) N h hydrate number n w empirical constant (n w = 4) n g empirical constant (n g = 2) N permeability reduction index P pressure (Pa) P e equilibrium pressure (Pa) P g gas pressure (Pa) P w water pressure (Pa) P 0 initial pressure (Pa) ∆P BHP bottom-hole pressure (Pa) ∆P 6 production pressure depressurized to 5.95 MPa ∆P 6 + ∆T production pressure depressurized to 5.95 MPa with the well-wall heating . q g mass rate in terms of injection/production of gas (kg/(m 3 ·s))…”

Section: Discussionmentioning

confidence: 99%

“…The natural gas hydrate resource has been considered as a potential strategic energy resource for the future [2,3]. Several efficient and feasible gas recovery methods for in-situ CH 4 recovery from the hydrate reservoirs have been proposed, such as hot water injection [4,5], in situ combustion [6,7], depressurization [8][9][10][11], inhibitor injection [12,13], CO 2 replacement [14,15] and the combined methods [16][17][18][19][20]. Using these technologies, extensive research on natural gas production from hydrate in field trials has been conducted within the last decade [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of the Production Behavior of Methane Hydrates under Depressurization Conditions Combined with Well-Wall Heating

Ruan

2017

Energies

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Abstract:In this study, a 2D hydrate dissociation simulator has been improved and verified to be valid in numerical simulations of the gas production behavior using depressurization combined with a well-wall heating method. A series of numerical simulations were performed and the results showed that well-wall heating had an influence enhancing the depressurization-induced gas production, but the influence was limited, and it was even gradually weakened with the increase of well-wall heating temperature. Meanwhile, the results of the sensitivity analysis demonstrated the gas production depended on the initial hydrate saturation, initial pressure and the thermal boundary conditions. The supply of heat for hydrate dissociation mainly originates from the thermal boundaries, which control the hydrate dissociation and gas production by depressurization combined with well-wall heating. However, the effect of initial temperature on the gas production could be nearly negligible under depressurization conditions combined with well-wall heating.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Production Behavior of Methane Hydrates under Depressurization Conditions Combined with Well-Wall Heating

Ruan

2017

Energies

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“…The in-situ combustion process consists in locating a point heat source in the hydrate region, via direct combustion of a liquid fuel and an oxidant [23,24].…”

Section: Introductionmentioning

confidence: 99%

“…Recovering methane from hydrate reservoirs can be also combined with simultaneous permanent CO 2 sequestration [23,25,26]. The CO 2 injection into the NGH sediments causes the gaseous CH 4 release and the formation of CO 2 hydrate, even if global conditions of pressure and temperature remain within the CH 4 hydrate stability zone.…”

Section: Introductionmentioning

confidence: 99%

Energy and Environmental Analysis of Membrane-Based CH4-CO2 Replacement Processes in Natural Gas Hydrates

et al. 2019

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Natural gas hydrates are the largest reservoir of natural gas worldwide. This paper proposes and analyzes the CH4-CO2 replacement in the hydrate phase and pure methane collection through the use of membrane-based separation. The investigation uses a 1 L lab reactor, in which the CH4 hydrates are formed in a quartz sand matrix partially saturated with water. CH4 is subsequently dissociated with a CO2 stream supplied within the sediment inside the reactor. An energy and environmental analysis was carried out to prove the sustainability of the process. Results show that the process energy consumption constitutes 4.75% of the energy stored in the recovered methane. The carbon footprint of the CH4-CO2 exchange process is calculated as a balance of the CO2 produced in the process and the CO2 stored in system. Results provide an estimated negative value, equal to 0.004 moles sequestrated, thus proving the environmental benefit of the exchange process.

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“…Gas hydrates are non-stoichiometric inclusion compounds made from water and light molecules, which are stable under high-pressure and low-temperature conditions [6][7][8]. Recently, a vast amount of gas hydrate has been naturally confirmed Knowing the physical properties of sediments can aid in the basic understanding of the gas hydrate occurrence rates and is important for the design and optimization of gas hydrate production technologies [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Physical Properties of Hydrate Sediments Recovered from the Pearl River Mouth Basin in the South China Sea: Preliminary Investigation for Gas Hydrate Exploitation

et al. 2017

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Laboratory based research on the physical properties of gas hydrate hosting sediment matrix was carried out on the non-pressurized hydrate-bearing sediment samples from the Chinese Guangzhou Marine Geological Survey 2 (GMGS2) drilling expedition in the Pearl River Mouth (PRM) basin. Measurements of index properties, surface characteristics, and thermal and mechanical properties were performed on ten sediment cores. The grains were very fine with a mean grain size ranging from 7 to 11 µm throughout all intervals, which provide guidance for the option of a screen system. Based on X-ray Computed Tomography (CT) and SEM images, bioclasts, which could promote hydrate formation, were not found in the PRM basin. However, the flaky clay might be conducive to hydrate formation in pore spaces. The measured sediment thermal conductivities are relatively low compared to those measured at other mines, ranging from 1.3 to 1.45 W/(m·K). This suggests that thermal stimulation may not be a good option for gas production from hydrate-bearing sediments in the PRM basin, and depressurization could exacerbate the problems of gas hydrate reformation and/or ice generation. Therefore, the heat transfer problem needs to be considered when exploiting the natural gas hydrate resource within these areas. In addition, the results of testing the mechanical property indicate the stability of hydrate-bearing sediments decreases with hydrate dissociation, suggesting that a holistic approach should be considered when establishing a drilling platform. Both the heat-transfer characteristic and mechanical property provide the foundation for the establishment of a safe and efficient production technology for utilizing the hydrate resource.

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Simulation of CO2 storage and methane gas production from gas hydrates in a large scale laboratory reactor

Cited by 63 publications

References 29 publications

Numerical Investigation of the Production Behavior of Methane Hydrates under Depressurization Conditions Combined with Well-Wall Heating

Numerical Investigation of the Production Behavior of Methane Hydrates under Depressurization Conditions Combined with Well-Wall Heating

Energy and Environmental Analysis of Membrane-Based CH4-CO2 Replacement Processes in Natural Gas Hydrates

Analysis of the Physical Properties of Hydrate Sediments Recovered from the Pearl River Mouth Basin in the South China Sea: Preliminary Investigation for Gas Hydrate Exploitation

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