Two oil types on North slope of Alaska; implications for exploration

Magoon, L. B.; Claypool, G. E.

Abstract:

40 oil samples from across the N Slope of Alaska have been analyzed by the US Bureau of Mines and the US Geological Survey. Results of these analyses suggest 2 separate genetic oil types. The first, the Simpson-Umiat oil type, occurs in reservoir rocks of Cretaceous and Quaternary age. These are higher gravity, low- sulfur oils with no, or slight, odd-numbered n-alkane predominance and pristane to phytane ratios greater than 1.5. The second type, the Barrow-Prudhoe oil type, occurs in reservoir rocks of Carboniferous to Cretaceous age. Physical properties of these oils are variable, but in general the oils are medium-gravity, high-sulfur oils with slight even-numbered n-alkane predominance and pristane to phytane ratios less than l.5. The 2 types are believed to originate from different source rocks.

Genre:

Article

ProdID:

70011728

Citation Author:

Magoon, L. B.; Claypool, G. E.

Citation Contributing Office:

Energy Resources Program

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Citation End Page:

652

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Citation Language:

English

Citation Larger Work Title:

American Association of Petroleum Geologists Bulletin

Citation LatN:

71.39

Citation LatS:

51.21

Citation LonE:

-130.0

Citation LonW:

172.45

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Citation Phsyical Description:

9 p.

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Citation Publisher:

AAPG

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Citation Search Results Text:

Two oil types on North slope of Alaska; implications for exploration; 1981; Article; Journal; American Association of Petroleum Geologists Bulletin; Magoon, L. B.; Claypool, G. E.

Citation Start Page:

644

Citation Volume:

Citation Year:

1981

Type:

citation/reference

Text:

Two oil types on North slope of Alaska; implications for exploration; 1981; Article; Journal; American Association of Petroleum Geologists Bulletin; Magoon, L. B.; Claypool, G. E.