· From this rate (q) calculate the bottom hole flowing pressure (Pwf) using productivity index (J) equation you are using commonly we use this equation: Pwf = (J * Pr – q)/J.
· Look at the list of your available pump you have in the stock that match with design rate
· Calculate the average specific gravity of liquid you have using this equation: SG fluid = Wc * SGw + (1 - Wc) SGo
· Calculate the pressure gradient along the tubing in the well with this : Gradien = SG fluid x 0.433
· Calculate the applied intake pump pressure using : PIP = Pwf - Gradien(Depth@pwf – Depth @ pumpsetting) note: the depth must in TVD
· Calculate the TDH (total dynamic head) that is Head due to tubing or WHP pressure + Net vertical lift + Friction lost or for quick calculation based on my experience is : TDH = ( WHP (psia) / 2.31 ) + ( Pump setting depth - (PIP/2.31) ) + 250 ( I normally used for friction loss)
· Calculate the required stages of the pump: Stages = ( TDH / (Head/Stages) using pump chart )
· Calculate the HP of the pump : HP = Q.TDH.SG/(135770.eff)
· Choose the proper motor type for this pimp
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