Petroleum geology of Kodiak Shelf, Alaska.
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Abstract
Organic geochemical data show that Cenozoic rocks on Kodiak Island, in Albatross basin, and under the continental slope generally contain less than 0.5 wt. % organic carbon. Moreover, kerogen from all rocks analyzed is predominantly (60 to 100%) herbaceous; woody and coaly kerogens are present in secondary (20 to 40%) amounts. Most strata in shelf basins are thermally immature; however, Eocene and Oligocene strata, which probably floor the shelf basins, are mature on the basis of comparison with coeval strata onshore. Eocene and Oligocene rocks have poor reservoir properties; the best reservoirs are probably in upper Miocene or Pliocene and younger rocks. Potential traps for hydrocarbons include Tugidak uplift, parts of Albatross Bank, structures in the central-shelf upli t, and Portlock anticline. Overall, unless hydrocarbon source rock properties improve offshore, gas and gas condensate are the most likely hydrocarbons to have been generated.
Study Area
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | Petroleum geology of Kodiak Shelf, Alaska. |
Series title | American Association of Petroleum Geologists Bulletin |
DOI | 10.1306/2F919454-16CE-11D7-8645000102C1865D |
Volume | 64 |
Issue | 8 |
Year Published | 1980 |
Language | English |
Publisher | American Association of Petroleum Geologists |
Description | 18 p. |
First page | 1140 |
Last page | 1157 |
Country | United States |
State | Alaska |
Other Geospatial | Kodiak Shelf |
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