Skip to Main Content
Book Chapter

Geochemistry of Oils in the Northern Viking Graben

By
H. M. Chung
H. M. Chung
Mobil Research and Development Corp. Dallas, Texas, U.S.A.
Search for other works by this author on:
W. S. Wingert
W. S. Wingert
Mobil Research and Development Corp. Dallas, Texas, U.S.A.
Search for other works by this author on:
G. E. Claypool
G. E. Claypool
Mobil Research and Development Corp. Dallas, Texas, U.S.A.
Search for other works by this author on:
Published:
January 01, 1992

ABSTRACT

The compositions of crude oils in the northern Viking graben area reflect the influence of both the types of organic matter and the thermal maturity of Jurassic source rocks in the major basin depocenters, referred to as the Oseberg and Troll kitchens. Forty-four oil samples were analyzed and classified primarily on the basis of chemical composition, but with recognition of constraints on origins imposed by geographic and stratigraphic locations. Five groups are recognized: (1) Snorre oils, (2) Statfjord-Gullfaks oils, (3) Brent-Oseberg Beta-Veslefrikk oils, (4) Oseberg Alpha-Troll oils, and (5) Agat and Blocks 35/8 and 35/11 oils. The compositions of oils in the first three groups reflect the large relative proportions of marine organic matter and the lower temperatures of expulsion characteristic of oils derived from the Draupne Formation. The compositions of oils in the last two groups reflect source rocks having more terrestrial organic matter and higher temperatures of expulsion.

The initial phase of hydrocarbon expulsion and migration from the Draupne Formation in the northern Viking graben began about 56 m.y.a. in the Troll kitchen and about 45 m.y.a. in the Oseberg kitchen. With continued subsidence and heating of Jurassic source rocks, gases and condensates were expelled, beginning about 40 m.y.a. in the Troll kitchen and about 30 m.y.a. in the Oseberg kitchen. This secondary phase of hydrocarbon generation has mixed with and displaced some of the earlier accumulations.

You do not currently have access to this article.

Figures & Tables

Contents

AAPG Memoir

Giant Oil and Gas Fields of the Decade 1978-1988

Michel T. Halbouty
Michel T. Halbouty
Search for other works by this author on:
American Association of Petroleum Geologists
Volume
54
ISBN electronic:
9781629811086
Publication date:
January 01, 1992

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal