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TitleDown-hole-monitoring data analysis and interpretation for the JOGMEC/NRCan/Aurora Mallik 2007-2008 Gas Hydrate Production Research Well Program
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorFujii, K; Sakiyama, N; Morikami, Y; Ikegami, T; Pimenov, V; Shako, V; Parshin, A; Inada, N; Nakatsuka, Y; Wright, J F; Dallimore, S RORCID logo
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. 91-105, 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
Illustrationsschematic diagrams; plots; tables
ProgramGas Hydrates
Released2012 12 14 (13:00)
AbstractPermanently installed monitoring-sensor cables behind the production-well casings were used to acquire distributed-temperature data, and electrical potentials were passively monitored at the down-hole electrodes in the winters of 2007 and 2008 for the JOGMEC/NRCan/Aurora Mallik Gas Hydrate Production Research Well Program. The data could be almost continuously acquired during the production-test periods without interfering with production operations once the down-hole-sensor cables were connected to the surface system. Some useful information related to production activities was obtained from the distributed-temperature data. The temperature-depth profiles obtained during the depressurizations in the 2008 test indicated a promising potential for tracking of the fluid levels in the annulus, which qualitatively corresponds to the fluid-volume change estimated from the differential pres-sures. Temperature profiles also contributed a complementary estimation of production parameters, such as the water-production rate under assumed conditions. The temperature disturbance observed during cement curing suggests a thermal impact on the gas hydrate by the heat of cement hydration. Passive electrical-potential measurement is considered a promising candidate for further development. The measurement was attempted to acquire streaming-potential signals from formation-fluid movement in porous media under the pressure gradient during various operations. Qualitative observation shows a rela-tionship between signal-polarity change and the direction of possible fluid flows in the formation, which suggests local-scale fluid flow near the electrodes.

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