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He recommended Standing's (1947) correlations for formation volume factor at and below the bubble point pressure.
The correlation was developed with 11,728 experimentally obtained formation volume factors at, above, and below the bubble point pressure.
For heavy oils, oil viscosity is a strong function of pressure when the pressure is below the bubble point.
Solution gas drive following depressurization of oil reservoirs below the bubble point is the oldest and perhaps one of the most challenging oil recovery mechanisms to quantify.
The oil viscosity decreases exponentially with increasing gas solubility when the pressure of interest is below the bubble point pressure (Economides et al. 1994).
For saturated systems (Fig. 14), on the other hand, below the bubble point, an increase with the pressure until the bubble-point pressure was reached.
Similar(46)
In the compositional model, the fluids system was maintained above the bubble point and below the miscibility pressure to ensure the secondary flood.
Below the onset of asphaltene precipitation and above the bubble point, the pressure reduction led to an increase in the size of aggregates; however, the presence of dispersant in the solution inhibited the growth of aggregated asphaltenes.
Each data set contains reservoir temperature, oil gravity, total solution gas oil ratio, and average gas gravity, bubble point pressure, oil formation volume factor at the bubble point pressure, and viscosity at the bubble point pressure.
A total of 1503 data measurements above the bubble point pressure were used to derive the correlation which is simply based on crude bubble point viscosity, pressure, and bubble point pressure.
If the oil bubble point pressure exceeded the estimated MMP, the miscibility pressure was set to the bubble point pressure of the oil.
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