IDENTIFICATION OF TYPE OF RESERVOIR FLUID - Petroleum Reservoir Fluid Property Correlations - page 192

80

Oils Gases

70

60

50

40

30

20

10

0

10 4 10 5 10 6 10 100 1000

Solution Gas-Liquid Ratio at p b or p d , scf/STB

Fig. 5-1. Stock-tank oil gravity, API, is not an indicator of reservoir fluid type. Data from 2,828
reservoir fluid studies or production tests.

Stock-Tank Liquid Color
as an Indicator of Reservoir Fluid Type

Table 1 from McCain (1994) also lists guidelines with respect
to stock-tank liquid color. 3 While the colors listed in the table are
generally correct, the color of the stock-tank liquid is not necessary for
determining or confirming the reservoir fluid type.