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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum Reservoir / Hydrocarbon Reserves / Hydrocarbon Reserves Classification / Hydrocarbon Reserves Uncertainty / Proven P90
[ Probable P50 ][ Possible P10 Proven Developed Producing Reserves (PDP) ] [ Proven Developed Non-Producing Reserves (PDN) ]