Discovered (reserves)
Discovered (reserves) : The term applied to a petroleum accumulation/ reservoir whose existence has been determined by its actual penetration by a well, which has also clearly demonstrated the existence of moveable petroleum by flow to the surface or at least some recovery of a sample of petroleum. Log and/or core data may suffice for proof of existence of moveable petroleum if an analogous reservoir is available for comparison. (See also: "Known Accumulation": Petroleum quantities that are discovered are in "known accumulations" or "known reservoirs") (SPE)