--> A Comparison of Crude Oil Chemistry on the American North Slope: Chukchi Sea-Mackenzie Delta, by A. C. Banet, Jr.; #90986 (1994).

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Abstract: A Comparison of Crude Oil Chemistry on the American North Slope: Chukchi Sea-Mackenzie Delta

Arthur C. Banet, Jr.

Publicly available geochemical data provide the basis for updating correlations, and comparing the major North Slope oil types. These data define ten oil types, representing independent petroleum systems germane to the area. Prudhoe type oils are shown to extend to immediately of west of the Arctic National Wildlife Refuge 1002 area. Comparisons of the geochemical data show considerable mixing of the Prudhoe and Umiat oil types occurs along the Barrow Arch. Recent Colville Delta discoveries fit within the Prudhoe, or mixed oil suite chemistry.

Biological marker analysis of the ANWR 1002 area oils differentiate three types. The Jago-Katakturuk-Manning Pt. type correlates with Mackenzie Type A oils and is derived from the Upper Cretaceous Bentonitic Shale Unit. The Angun Pt. oil is of marine origin, and is likely derived from multiple sources. The Kavik oil stain is unique. Biomarker data indicate that some nonmarine Mackenzie type C2 oils have migrated into reservoirs which typically yield type C1 oils.

The geochemistry of Chukchi Sea oil represents a newly described and independent petroleum system. The multi-faceted chemistry of the Hammerhead oil shows it is the most unique and enigmatic type on the North Slope. It represents another independent petroleum system. Data are not yet available to determine whether the major Kuvlum discovery, in the Beaufort Sea, correlates to the Prudhoe, Hammerhead, Mackenzie Delta or ANWR oil suites.

AAPG Search and Discovery Article #90986©1994 AAPG Annual Convention, Denver, Colorado, June 12-15, 1994