Investigate the effect of skin factor (positive and negative) on productivity of well with the parameters described below. Calculate effective wellbore radius for the skin factor you use. Creates separate figures for effect of positive and negative skin.
Assume steady state conditions, and under-saturated oil reservoir.
Write your conclusions and explain the reasons behind your conclusions.
Submit spread sheet(s), and word document including typed equations in native format.
a.Depth 8500 ft
b.Initial reservoir pressure 2950 psi
c.Reservoir Temperature 175oF
d.Porosity 10%
e.Total reservoir area 2700 acres
f.Average formation thickness 100 ft
g.Average water saturation 25%
h.Irreducible water saturation 25%
i.Oil viscosity 2 cp
j.Oil compressibility, 15×10-6
k.Water compressibility, 5×10-6
l.Water viscosity 1 cp
m.Oil Bubble Point pressure 1750 psi
n.Gas solubility at bubble point pressure 350 scf/STB
o.Formation Volume Factor at initial reservoir pressure 1.25 BBL/STB
p.Z factor at initial reservoir conditions 0.97