A well is currently producing 173 bfpd. The well file records show that after the initial...

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A well is currently producing 173 bfpd. The well file records show that after the initial perforating, the well was killed with a brine that has recently shown to be damaging to the clays in the pay zone. During the completion, 63 bbls of the brine were lost at the 200 ft perforated interval. The initial undamaged average permeability was 610 md, and the permeability is homogeneous throughout the zone. The well is not fractured. The porosity is 30%, the wellbore diameter rw = 8 inches, and the drainage radius re=2150 ft. The permeability now is estimated at 65 md from rate and pressured data. - Calculate the volume of the fluid that will fill the pore space surrounding the wellbore. Calculate the damage radius and the depth of the damaged zone. If we assume that the fluid leaked off evenly in the zone, what would be the productivity if the damage was removed from the well? Calculate the skin factor. A well is currently producing 173 bfpd. The well file records show that after the initial perforating, the well was killed with a brine that has recently shown to be damaging to the clays in the pay zone. During the completion, 63 bbls of the brine were lost at the 200 ft perforated interval. The initial undamaged average permeability was 610 md, and the permeability is homogeneous throughout the zone. The well is not fractured. The porosity is 30%, the wellbore diameter rw = 8 inches, and the drainage radius re=2150 ft. The permeability now is estimated at 65 md from rate and pressured data. - Calculate the volume of the fluid that will fill the pore space surrounding the wellbore. Calculate the damage radius and the depth of the damaged zone. If we assume that the fluid leaked off evenly in the zone, what would be the productivity if the damage was removed from the well? Calculate the skin factor.

Answer rating: 100% (QA)

Calculations for Wellbore Damage 1 Pore Space Volume Wellbore radius rw 8 inches 2 033 ft Drainage r... View the full answer