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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Properties of Beaufort Basin Liquid Hydrocarbons
ABSTRACT
Some twenty oil samples from ten wells have been recovered in the Mackenzie Delta of the Beaufort 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 Beaufort 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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