RE:utkant: show your back of envelope calculations. - STOOIP = 7758 (bbls/acre-ft) x Oil Reservoir Area (acres) x Average Net Pay Thickness (ft) x Porosity (fraction) x Oil Saturation (fraction) x Oil Shrinkage (1/Bo)
7758 x 3156 acres x 1000 feet x 0,26 poro x 0,5 (50% water?) x 0,8 (shrinkage) = 2 546 361 792
With a recovery factor of 20% you get 509 million barrels!