Sirius Petroleum Software

Oil Forecast for Windows

The OilForc program generated the following graphs using an example file supplied with the program. In this example, a single well produces from a large reservoir. The PVT data, Core Permeability data and Well IPR data was specified. The example was taken from Craft, and Hawkins, revised by Terry, Applied Petroleum Reservoir Engineering, Prentice-Hall, Chemical Engineering Series 1991, Chapter 10, Example Problem, Case no. 1, pp.391-419.

This is a graph of Oil Formation Volume Factor (Bo) versus PVT pressure. Note that the Bubble point for this example is at 620 psia.

This is a graph Solution Gas-Oil Ratio (Rs) versus PVT pressure.

This is a graph of Oil Relative Permeability versus Liquid Saturation. Note that the residual fluid saturation for this example is at 65%

This is a graph of the Gas/Oil Permeability Ratio versus Liquid Saturation. Based on the Kro and the Krg/Kro ratio, the Krg is calculated at any fluid saturation.

 

 This is a graph of the production forecast versus time. Note that the pool is abandoned around year 2013. Also note, that in this example, the critical gas saturation is reached around year 2005.

 

 This is a graph of the forecasted pool GOR versus time in years. Note that during year 2005, the critical gas saturation is reached, and the producing GOR increases dramatically.

 This is a graph of the forecasted pool pressure and the cumulative oil recovery versus time in years. Note the increasing pressure decline as more and more gas is produced.

 

 This is a graph of the forecasted reservoir pressure versus cumulative oil recovery. For this example, at abandonment, oil recovery reached 10%.

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