It is obvious that the total wellbore storage coefficient is the sum of wellbore storage effect caused by fluid expansion and wellbore storage effect due to changing fluid level. The following data is given for an oil well that is scheduled for a drawdown test: volume of oil in the wellbore = 180 STB average oil density in the wellbore = 45 lb/ft3 the cross-sectional area of the wellbore = 0.2995 ft2 Calculate: a) the total wellbore storage coefficient in (STB/psi) the dimensionless wellbore storage coefficient b)