Predicting gas generation by depressurization of gas hydrates where the sharp-interface assumption is not valid

Gerami, Shahab; Pooladi‐Darvish, Mehran

doi:10.1016/j.petrol.2006.01.012

Cited by 54 publications

(30 citation statements)

References 14 publications

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“…It is defined as the ratio of sensible heat of the sediment, hydrate, and fluids, to the heat of hydrate dissociation. It is given by the following expression [53]:…”

Section: Effect Of the Sensible Heat Of The Reservoirmentioning

confidence: 99%

Analyzing the process of gas production for natural gas hydrate using depressurization

et al. 2015

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“…It is defined as the ratio of sensible heat of the sediment, hydrate, and fluids, to the heat of hydrate dissociation. It is given by the following expression [53]:…”

Section: Effect Of the Sensible Heat Of The Reservoirmentioning

confidence: 99%

Analyzing the process of gas production for natural gas hydrate using depressurization

et al. 2015

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“…Furthermore, the pressure response indicated flow within the porous medium, implying mobility of the formation water (Hancock et al, 2005b). Gerami and Pooladi-Darvish (2007a) and Tabatabaie and Pooladi-Darvish (2009) have shown that the rate of gas production by depressurization strongly depends on whether hydrate dissociation occurs over a zone or on a surface, with the former providing substantially larger rate of hydrate dissociation. Hancock et al (2005b) reported application of conventional PTA techniques developed for single-phase isothermal well testing to the MDT results.…”

Section: Well Testing and Interpretation Issuesmentioning

confidence: 99%

Challenges, Uncertainties, and Issues Facing Gas Production From Gas-Hydrate Deposits

Moridis

Collett

Pooladi‐Darvish

et al. 2011

SPE Reservoir Evaluation &Amp; Engineering

280

110

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Summary The current paper complements the Moridis et al. (2009) review of the status of the effort toward commercial gas production from hydrates. We aim to describe the concept of the gas-hydrate (GH) petroleum system; to discuss advances, requirements, and suggested practices in GH prospecting and GH deposit characterization; and to review the associated technical, economic, and environmental challenges and uncertainties, which include the following: accurate assessment of producible fractions of the GH resource; development of methods for identifying suitable production targets; sampling of hydrate-bearing sediments (HBS) and sample analysis; analysis and interpretation of geophysical surveys of GH reservoirs; well-testing methods; interpretation of well-testing results; geomechanical and reservoir/well stability concerns; well design, operation, and installation; field operations and extending production beyond sand-dominated GH reservoirs; monitoring production and geomechanical stability; laboratory investigations; fundamental knowledge of hydrate behavior; the economics of commercial gas production from hydrates; and associated environmental concerns.

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“…The depressurization-induced hydrate dissociation is limited by heat transfer [17,29]. The results of experimental and numerical simulations have shown that in the process of the gas production by depressurization, the temperatures can significantly be reduced so as to the pore water probably freezes and the hydrate reforms [9,16,[30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…Numerical analysis is an effective approach in modeling and simulating hydrate dissociation in porous media, many numerical models have been systematically developed to simulate natural gas production from hydrates and predict the possible behaviors [8,26,29,[35][36][37][38][39]. Sung et al [35] developed a three-dimensional, multi-phase flow finite-difference numerical model to evaluate the gas recovery performances with Kim-Bishnoi kinetic dissociation model.…”

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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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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Predicting gas generation by depressurization of gas hydrates where the sharp-interface assumption is not valid

Cited by 54 publications

References 14 publications

Analyzing the process of gas production for natural gas hydrate using depressurization

Analyzing the process of gas production for natural gas hydrate using depressurization

Challenges, Uncertainties, and Issues Facing Gas Production From Gas-Hydrate Deposits

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

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