Two Phase Geothermal Well Deliverability Output Curve Linearization Analysis

Abstract

Several attempts have been made in the past to transform the two phase Deliverability Output curve in a linear relationship by means of different types of graphics such as log-log and log-linear but there has been unsuccessfull. The present work plot Log (W) vs Log (MDP–Pwh) in order to give an answer at this issue. It has been proposed to use the Maximum Discharge Pressure (MDP) instead of Reservoir stabilized pressure (Pr) and the Wellhead pressure (Pwh) instead of flowing bottom reservoir (Pwf) to calculate pressure drop; in the case of steady state flow has been achieved the stabilized flow condition, the plot should give a straight line at wellhead condition. Data from three geothermal wells is analyzed in order to show this procedure, coefficients obtained by means of least squares techniques will be used to determine the Deliverability Output curve equation.