@wikipedia
Synonym : Proven & Probable & Possible Hydrocarbon Reserves = 3P
3P = Proven P90 + Probable P50 + Possible P10
See Also
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 ]