Evaluation of the Gas Production Potential of Some Particularly Challenging Types of Oceanic Hydrate Deposits |
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Authors: | George J Moridis Matthew T Reagan Katie L Boyle Keni Zhang |
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Institution: | (1) Department of Ingegneria Chimica, University of Rome La Sapienza, Via Eudossiana 18, 00184 Rome, Italy;(2) S Quaker Ave 4514, Tulsa, OK, 74105, USA |
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Abstract: | We use the TOUGH+HYDRATE code to assess the production potential of some particularly challenging hydrate deposits, i.e.,
deposits that are characterized by any combination of the following factors: absence of confining boundaries, high thermodynamic
stability, low temperatures, low formation permeability. Using high-resolution grids, we show that a new horizontal well design
using thermal stimulation coupled with mild depressurization yields production rates that appear modest and insufficient for
commercially viable production levels. The use of parallel horizontal wells (with the lower one providing thermal stimulation
through heat addition, direct injection or circulation of warm water, and the upper one producing under a mild depressurization
regime) offers tantalizing possibilities, and has the potential of allowing commercial production from a very large number
of hydrate deposits that are not currently considered as production candidates if the problem of the corresponding large water
production can be solved. |
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Keywords: | |
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