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Effects of Steam Soak on the Two Eocene Heavy Crude Oils from the Urdaneta District (Venezuela)

Abstract:

Simulation studies of steam-alkaline injection were made using the only two Eocene viscous crude oils from the Urdaneta District (Venezuela). Reactors were stainless steel and work conditions were a temperature of 200C, 20 days' reaction time, and an alkali concentration of 4000 ppm. The aim of this work was to evaluate chemistry changes in the saturates and aromatics of both crudes as a result of the crude-alkaline-solid phase interactions. There were significant variations in the biomarker distribution in the two crudes (higher for the Boscan crude), particularly in the mono- and triaromatic steranes, and benzotiophenes of the two crudes.