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TitleGas hydrate production from the Mallik reservoir: numerical history matching and long-term production forecasting
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorUddin, M; Wright, J F; Dallimore, S RORCID logo; Coombe, D
SourceScientific results from the JOGMEC/NRCan/Aurora Mallik 2007-2008 gas hydrate production research well program, Mackenzie Delta, Northwest Territories, Canada; by Dallimore, S RORCID logo (ed.); Yamamoto, K (ed.); Wright, J F (ed.); Bellefleur, GORCID logo (ed.); Geological Survey of Canada, Bulletin 601, 2012 p. 261-289, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Scientific results from the JOGMEC/NRCan/Aurora Mallik 2007-2008 gas hydrate production research well program, Mackenzie Delta, Northwest Territories, Canada
File formatpdf
ProvinceNorthwest Territories
AreaMackenzie Delta
Lat/Long WENS-134.5000 -134.0000 69.5000 69.2500
Subjectsfossil fuels; engineering geology; geophysics; hydrocarbons; gas; hydrocarbon gases; hydrate; methane; methane hydrate; petroleum resources; geophysical surveys; gamma ray logging; gamma-ray surveys; seismic surveys; porosity; permeability; geothermics; modelling; production tests; drilling techniques; pressure-temperature conditions; logging techniques; Tertiary; Cenozoic
Illustrationstables; plots; profiles; logs; location maps
ProgramGas Hydrates
Released2012 12 14 (13:00)
AbstractThe first sustained production of methane from gas hydrate was achieved at the Mallik site over a 6-day period during March 2008, as part of a co-operative research and development effort by the Japan Oil, Gas and Metals National Corporation and the Geological Survey of Canada, a part of Natural Resources Canada. Basic operational parameters, such as gas/water flow rates and bottom-hole flowing pressure and temperature, were continuously recorded throughout the production period. These data have enabled subsequent history matching, interpretation, and long-term production forecasting of the Aurora/JOGMEC/NRCan Mallik 2L-38 test well. In this work, a numerical history matching of the Mallik 2L-38 field test is conducted utilizing a single-well radial model with appropriate gridding choices. Importantly, our investigation reveals that the assumption of conventional gas-flow behaviour in a producing gas hydrate reservoir is inadequate for explaining the pattern of gas production observed during the Mallik test. A new gas-evolution model with characteristics similar to gas exsolution via depressurization of heavy oil is applied to successfully history match the Mallik production data.
Utilizing our base-case history match, we assess the effects and relative importance of reservoir heterogeneity, thermal conductivity, salinity, and permeability. The effect of reservoir extent (radial boundary distance) on long-term gas production is also explored. Overall, long-term gas hydrate production from the Mallik reservoir appears feasible, assuming sufficient internal continuity of the deposit, such that effective limits to production will depend on the location of the effective outer boundary of the resource.

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