3P = Proven P90 + Probable P50 + Possible P10
2P = Proven P90 + Probable P50
1P = Proven P90			Probable P50	Possible P10
Proven Developed Reserves(PD)		Proven Undeveloped Reserves (PUD)
Proven Developed Producing (PDP)	Proven Developed Non-Producing (PDN)

See also Russian Hydrocarbon Reserves Uncertainty Categories.

See Also

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum Reservoir / Hydrocarbon Reserves / Hydrocarbon Reserves Classification

[ Hydrocarbon Reserves Probability Distribution ]

[ Russian Hydrocarbon Reserves Uncertainty Categories ]