Additional contributing factors include pressure depletion being the dominant recovery mechanism with little to no evidence of water support, resulting in a lower recovery factor, as well as lower-than-anticipated well productivity that may be due to potential formation damage in the oil-bearing zones.
KrisEnergy says the estimated ultimate recovery from the five development wells in the Apsara oil development is “likely to be a small fraction” of the pre-development estimates due to significantly lower volume of hydrocarbon-in-place connected to the wells.
The underperformance is also attributed to the geographical complexity resulting in smaller oil accumulations.
