Based on the research of biomarker , geochemical
characters of mixed - heavy oilhave been studied. It indicates
that mixed - heavy oil the mixture which is undergone
biodegradation earlier an injected non - biodegradation later.
The geochemical parameters are not coordination and
composition and property have opposite tendency to
biodegradation. After biodegradation , the mix may lead to
heavy iol dilution and improve its pysics - chemical property.
Mixed - heavy oils in different oil reservoirs are non -
equilibrinm. It shows that the nearer oil generating
depression is ,the more dilution heavy - oil is.
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