Question $1$:

An oil well is producing at a constant flow rate of $300$ STB$/$day under unsteady$-$state flow conditions. The reservoir has the following rock and fluid properties:

$B_o=1\mathrm{.}25bb\frac{l}{S}TB$

${}_o=1\mathrm{.}5cp$

$c_1=12{10}^{-6}{}^{-1}$

$k_o=60md$

$h=15ft$

$p_i=4000$

$=15\%$

$r_w=0\mathrm{.}25ft$

Calculate pressure at radii of $0\mathrm{.}25,5,10,50,100,500,1000,1500,2000$ feet, for $1$ hour.

Plot the results as:

a$.$ Pressure vs$.$ logarithm of radius

b$.$ Pressure vs$,$ radius

Repeat part $1$ for $t=12$ hours