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Figure 18. Figure expands upon the data of Figure 17. The pyrolysates and unalterd Rainbow oils are depicted in the lower left. The range of continuous variation in these oils ends at values of SF(C3-nC5) of 1.7 and of SF(P10+) at 1.175. A large number of paired SF(P10+) and SF(C3-nC5) data are added, representing a random selection of oils from western Canada. Note the major increase in range of values of SF(C3-nC5) without comensurate increase in SF(P10+), i.e., increases in SF(C3-nC5) that are not due to increasing maturity. The extended range of SF(C3-nC5) in these oils overlaps the range of values of SF(C3-nC5) observed in gas-condensates. This is contributory evidence to the hypothesis that high-value SF(C3-nC5) oils have undergone mixing, the advection of gas-condensate. Futher evidence of gas-enrichment is presented in Section 5 and in Thompson, 2002, 2004 and 2006. |