Layer Data Input
Program Internal Calculations
Results: Initial Calculations
Results: Relative Permeability Data
Results: Derivative of Fractional Flow Curve
Results: Performance to Interference
Results: Performance to Fillup
Results: Performance from Fillup to Breakthrough
Layer Data Input
A : 
Reservoir Pattern Area , acres 

Average formation layer thickness , ft. 

Average Porosity , fraction 

Oil Saturation @ start of flood , fraction 

Oil formation volume factor @ start of flood , RB / STB 

Water formation volume factor @ start of flood, RB / STB 

Initial water saturation ; fraction 

Oil viscosity , cp 

Water viscosity , cp 

1/2 the distance between adjacent injectors, ft.' 

Well radius , ft. 

Distance between adjacent rows of wells , ft. 

Absolute Permeability  Base permeability is permeability to oil at irreducible
water saturation , (Ko ) @ S_{wi}.


Pressure difference beween formation face injection pressure and pressure @ the
leading edge of the oil bank in the reservoir , psig

Relative Permeability Data: 
User manually inputs
relative permeability data or can use default algorithm 


Program Internal Auto Calculations
Calculations of the Fractional Flow Curve
Calculations of the Derivative of the Fractional Flow Curve

M :

Program calculates mobility ratio prior to water breakthrough utilizing the fractional flow curve

E_{abt} : 
Program calculates the areal sweep efficiency at water breakthrough using Figure
E.6

S_{g}* : 
Program calculates maximum gas saturation, S_{g}*, for which the CGM method is valid


S_{g}* : C * (S_{oi}S_{obt} )
figure E.7

S_{obt} 
Program calculates the average oil saturation in the swept zone at water breakthrough

Test 
Program tests validity of program by comparing calculated S_{g}, the current gas
saturation at flood start to S_{g}* 

The condition S_{g} < S_{g}* must be met for calculations to be performed 
RESULTS: INITIAL CALCULATIONS
RESULTS: RELATIVE PERMEABILITY DATA
RESULTS: DERIVATIVE OF THE FRACTIONAL FLOW CURVE
RESULTS: PERFORMANCE TO INTERFERENCE
RESULTS: PERFORMANCE TO FILLUP
RESULTS: PERFORMANCE FROM FILLUP TO WATER BREAKTHROUGH
RESULTS: PERFORMANCE FROM FILLUP BREAKTHROUGH TO FLOODOUT
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