ABSTRACT
Technical data Well location: offshore Depth: 8000 ft Wellhead pressure: 80 psi Initial reservoir pressure: 3,000 psi Expected pressure decline: 250 psi drop every year until it reaches 2000
psi, at which time a water injection operation will maintain a constant pressure
Productivity index = 10 BPD/psi (assumed constant)
290 Aggour
Production: all oil Produced gas-oil ratio: 600 scf/bbl
Economic data Average price of oil: $1O.0/bbl Average operating cost: $4.0/bbl
Difference in costs of drilling and completing with 4 in. and 3 in. tubings = $2,520,000
Discount rate: 14% Solution For the purpose of illustration, we will perform the analysis over a period of 5 years only. The same procedure is used for a detailed analysis over the life of the well.
