Question

• A reservoir has 500 Af from the takepoint down to the oil water contact, porosity of 28%, Swi of 25%. Calculate the original oil in place. Use Boi = 1.25 RB/STB ( reservoir barrels/stock tank barrel) •

Calculate water-drive recovery to calculate reserves. •

Assume J=1.5 BOPD/psi and a drawdown of 400 psi to calculate the initial rate •

Calculate the rate on each anniversary of initial production (assume 1/1/20) down to 50 BOPD. •

Remember now we know ∆Np, equal to reserves. We will calculate the initial rate, and the final rate is 50 BOPD. All that is unknown is “a”.

• Would this be proved reserves?

Answer 1

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