The volume of Hydrocarbon Reserves having a 90% certainty of getting this volume economically produced.
It corresponds to the P90 cut-off on the Hydrocarbon Reserves Probability Distribution.
It is often split into the following subcategories:
See Also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum Reservoir / Hydrocarbon Reserves / Hydrocarbon Reserves Classification / Hydrocarbon Reserves Uncertainty
[ Probable P50 ][ Possible P10 ]
[ Proven Developed Reserves = PD ]