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Experimental Modeling of Methane Recovery by Flue Gas Injection Into Frozen Hydrate-bearing ReservoirNormal access

Authors: E. Chuvilin, V. Istomin, V. Ekimova, B. Bukhanov, A. Hassanpouryouzband, J. Yang and B. Tohidi
Event name: Geomodel 2018
Session: Инженерные вопросы разработки месторождений
Publication date: 10 September 2018
DOI: 10.3997/2214-4609.201802425
Organisations: EAGE
Language: Russian
Info: Extended abstract, PDF ( 646.48Kb )
Price: € 20

In the course of experimental study, an assessment was made of the methane recovery from hydrate-bearing sandy reservoirs by flue gas injection. The experiments used a flue gas consisting of 14.6 mole% carbon dioxide (CO2) and 85.4 mole% % of nitrogen (N2) which is similar in composition of combustion products of coal-fired power plants. Experiments were carried out in the temperature range from +0.2 to -12 C at a pressure around 5 MPa, to determine optimal conditions for methane recovery from subpermafrost and intrapermafrost hydrate-saturated reservoirs. The results show that, despite the differences in recovery kinetics of natural gas from hydrate phase under different temperature conditions (the high rate of decomposition of methane hydrate was observed at a temperatures above 0 oC than at temperatures below 0 oC), the total methane recovery rate was practically the same. Thus, it has been shown that the method of flue gas injection can be used for methane recovery from intrapermafrost gas hydrates.

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