Assessment of methane gas production from Indian gas hydrate petroleum systems

N. Vedachalam, S. Ramesh, S. Srinivasalu, G. Rajendran, G.A. Ramadass and M.A. Atmanand

Applied Energy, 2016, vol. 168, issue C, 649-660

Abstract: The effectiveness of the electro-thermal and depressurisation based techniques applied to three marine gas hydrate reservoir settings of India is modeled and simulated using MATLAB and TOUGH+HYDRATE reservoir modeling software. The results indicate that the depressurisation technique (with an achievable ΔP of >90bar) will be effective in dissociating gas hydrates up to 145m from a well bore in the Krishna Godavari (KG) reservoir. The technique when applied to the Andaman and Mahanadi reservoirs is found to produce a maximum ΔP of 64 and 70bar against the minimum required threshold of 134 and 152bar, and hence, found to be less effective for hydrate dissociation. The in-situ electro-thermal technique will be effective in the KG and Andaman reservoirs; and in the Mahanadi reservoir, if the gas hydrate saturations are >17%. The depressurization technique when applied to a hypothetical sandy reservoir in the KG basin shows that the spatial pressure drop is nearly double that in a clayey setting, which is conducive for hydrate dissociation.

Keywords: Depressurization; Gas hydrate; Marine settings; Methane; Thermal; TOUGH+HYDRAT (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (8)

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DOI: 10.1016/j.apenergy.2016.01.117

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