$(10$ points$).$

$2.$ An oil well is produced for $600$ hrs followed by a buildup test for $500hrs.$ Sketch a typical pressure profile at the wellbore knowing that the pressure at the wellbore is affected by wellbore storage Cs$1,$ Cs$2,$ and $),$ initial reservoir pressure $=7000$ psi, wellbore pressure at the end of drawdown test $=6200$ and the average pressure at the end of the test $=6950.$ Label all of the important features.