INDEX gravity field

PVT analyses representing 15 oils from the Rainbow field and adjacent Muskeg-Keg River fields were examined, as detailed in Table 1. As shown in Figure 2 and equation (3), API gravity is correlated with SF(Pio+), confirming the role of SF(Pio+) as an index of maturity (Kissin 1987). 

The so-caUed Sigma concept has been widely used in the field of centrifugal sedimentation ever since its first development by Ambler in 1952. It is a simplified relation between the machine performance in terms of X50, total volumetric flow rate Q and an index of the centrifuge size E. The cut size X50 is represented by its terminal settling velocity Vg in the given liquid under gravity so that from Stokes law (using equation 7.5b for the definition of K)... 

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