Radial and horizontal flow through cylindrical layers. An oil well has a intermediate zone with reduced reservoir permeability k1. Calculate the pressure at the outer boundary pe when the oil rate is 100 bbl/d and the following data is given:
rw 6 in, k1 50 mD, pw 2000 psia,
r1 10 ft, k2 200 mD, ?o 5 cp,
k3 330 ft, h 20 ft.What is the pressure at outside the damage zone r1?