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The AAPG/Datapages Combined Publications Database

CSPG Bulletin

Abstract


Bulletin of Canadian Petroleum Geology
Vol. 23 (1975), No. 2. (June), Pages 295-303

Properties of Previous HitBeaufortNext Hit Basin Liquid Hydrocarbons

B. J. Burns, J. T. C. Hogarth, C. W. D. Milner

ABSTRACT

Some twenty oil samples from ten wells have been recovered in the Mackenzie Delta of the Previous HitBeaufortNext Hit Basin, Northwest Territories. The oils range in API gravity from 16.5° to 48°, with pour points from -75°F to + 75°F, and viscosities from 31 to 106 SUS (100°F). On the basis of chemical and physical properties, these oils can be divided into two groups. Group I oils generally occur deeper and have higher API gravities and pour points and lower viscosities than the Group II oils. From geochemical data, it is interpreted that the Group I oils have been bacterially degraded to Group II oils with the resultant loss of n-paraffins, including the wax components. Other physical transformations have also occurred. Such transformations usually have adverse effects on the properties of oils by reducing API gravities and increasing viscosities and sulphur content. However, for the Previous HitBeaufortTop oils, the over-all biodegradation effects have not appreciably altered the viscosities or sulphur content but have drastically lowered the pour point, which has a highly beneficial effect on the flow properties of the oils in the arctic climate.


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