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Characterization of the Structural–Stratigraphic and Reservoir Controls on the Occurrence of Gas Hydrates in the Eileen Gas Hydrate Trend, Alaska North Slope

Journal Article · · Journal of Marine Science and Engineering
DOI:https://doi.org/10.3390/jmse12030472· OSTI ID:2327006
 [1];  [1];  [2]
  1. US Geological Survey, Denver, CO (United States)
  2. National Energy Technology Laboratory (NETL), Pittsburgh, PA (United States)
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One of the most studied permafrost-associated gas hydrate accumulations in Arctic Alaska is the Eileen Gas Hydrate Trend. This study provides a detailed re-examination of the Eileen Gas Hydrate Trend with a focus on the gas hydrate accumulation in the western part of the Prudhoe Bay Unit. This integrated analysis of downhole well log data and published geophysical data has provided new insight on structural, stratigraphic, and reservoir controls on the occurrence of gas hydrates in the Eileen Gas Hydrate Trend. This study revealed the relatively complex nature of the gas hydrate occurrences in the Eileen Gas Hydrate Trend, with gas hydrates present in a series of coarsening upward, laterally pervasive, mostly fine-grained sand beds exhibiting high gas hydrate saturations. Most of the gas hydrate-bearing reservoirs in the Eileen Gas Hydrate Trend are laterally segmented into distinct northwest- to southeast-trending fault blocks, occur in a combination of structural–stratigraphic traps, and are only partially hydrate filled with distinct down-dip water contacts. These findings suggest that the traditional parts of a petroleum system (i.e., reservoir, gas source, gas migration, and geologic timing of the system formation) also control the occurrence of gas hydrates in the Eileen Gas Hydrate Trend.
Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
U.S. Bureau of Land Management; US Geological Survey (USGS); USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0022898
OSTI ID:
2327006
Journal Information:
Journal of Marine Science and Engineering, Journal Name: Journal of Marine Science and Engineering Journal Issue: 3 Vol. 12; ISSN 2077-1312
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (26)

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Table 1(p. 12)table Table 1
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Table 2(p. 27)table Table 2
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