hi everyone , i am studying transient pressure analysis right now , I am finding it difficult to determine the required straight line on the pressure vs time semi-log plot , since there are more than one straight line portion on the graph (like the wellbore storage effect) .

anyone knows how can i be 100% sure that the points i am taking are the correct ones ?

hi everyone , i am studying transient pressure analysis right now , I am finding it difficult to determine the required straight line on the pressure vs time semi-log plot , since there are more than one straight line portion on the graph (like the wellbore storage effect) .

anyone knows how can i be 100% sure that the points i am taking are the correct ones ?