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Energies 2017, 10(2), 187; doi:10.3390/en10020187

Using a Reactive Transport Simulator to Simulate CH4 Production from Bear Island Basin in the Barents Sea Utilizing the Depressurization Method†

Department of Physics and Technology, University of Bergen, Allegaten 55, 5007 Bergen, Norway
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Author to whom correspondence should be addressed.
Received: 31 December 2016 / Accepted: 4 February 2017 / Published: 8 February 2017
(This article belongs to the Special Issue Methane Hydrate Research and Development)
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Abstract

The enormous amount of methane stored in natural gas hydrates (NGHs)worldwide offers a significant potential source of energy. NGHs will be generally unable to reach thermodynamic equilibrium at their in situ reservoir conditions due to the number of active phases involved. Lack of reliable field data makes it difficult to predict the production potential and safety of CH4 production from NGHs. While the computer simulations will never be able to replace field data, one can apply state-of-the-artmodellingtechniquestoevaluateseveralpossiblelong-termscenarios. Realistic kinetic models for hydrate dissociation and reformation will be required, as well as analysis of all phase transition routes. This work utilizes our in-house extension of RetrasoCodeBright (RCB), a reactive transport simulator, to perform a gas hydrate production case study of the Bjørnøya (Bear Island) basin, a promising field with very limited geological data reported by available field studies. The use of a reactive transport simulator allowed us to implement non-equilibrium thermodynamics for analysisofCH4 production from the gas hydrates by treating each phase transition involving hydrates as a pseudo reaction. Our results showed a rapid propagation of the pressure drop through the reservoir following the imposition of pressure drawdown at the well. Consequently, gas hydrate dissociation and CH4 production began in the early stages of the five-year simulation period. View Full-Text
Keywords: methane hydrate; mixed hydrate; gas hydrate production; CO2 hydrate; CO2 storage methane hydrate; mixed hydrate; gas hydrate production; CO2 hydrate; CO2 storage
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Qorbani, K.; Kvamme, B.; Kuznetsova, T. Using a Reactive Transport Simulator to Simulate CH4 Production from Bear Island Basin in the Barents Sea Utilizing the Depressurization Method†. Energies 2017, 10, 187.

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