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Lookup NU author(s): Professor Stephen Larter
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A suite of heavy oils from a single Eocene sandstone reservoir section in the Liaohe basin (northeastern China) was analyzed to study the geological controls on oil viscosity, which spans a range of almost three orders of magnitude. The heaviest oils are biodegraded, as determined from the absence of n-alkanes and the low relative amount of isoprenoid alkanes. The large variation in viscosity can be explained by mixing, to various extents, of heavy biodegraded oils with less degraded oils. This is supported by a simple mixing model, which reproduces the observed data excellently. The model may assist in predicting the viscosity of reservoired oils before production by analyzing reservoir core extracts prior to deciding which intervals to steamflood.
Author(s): Koopmans MP, Larter SR, Zhang CM, Mei BW, Wu TS, Chen YX
Publication type: Article
Publication status: Published
Journal: AAPG Bulletin
Year: 2002
Volume: 86
Issue: 10
Pages: 1833-1843
ISSN (print): 0149-1423
ISSN (electronic): 1558-9153
Publisher: American Association of Petroleum Geologists
