D Depletion during the production period lowered reservoir energy and reduced the flow capability of the wic-09, wic-10 dan wic-11 wells. accordingly, well deliverability and the performance of the installed pumping system were assessed as an integrated system. the inflow capacity was established from the inflow performance relationship (ipr), with oil and water contributions evaluated separately because water cut was above 71.2%. hydraulic pumping unit (hpu) performance was then measured through volumetric efficiency; a result below 45% was taken as evidence that the operating setup required revision. the optimization variables were pump speed in strokes per minute (spm) and stroke length (sl). initially, the system delivered 71.2 bfpd at 5 spm and a 110-inch stroke, corresponding to 23.31% volumetric efficiency. recalculation using the ipr response and well characteristics recommended 29.6 spm and a 47-inch stroke. this configuration yielded 660 bfpd and increased volumetric efficiency to 93.18%. the findings show that matching hpu settings with reservoir data, production history, and mechanical pump calculations can substantially restore pumping effectiveness. the same evaluation framework may be considered for wic-09, wic-10 dan wic-11 and for other wap field wells with similar operating constraints