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SPE/WPC/AAPG joint definitions. PRODUCTION. Producing. RESERVES. COMMERCIAL. Being developed. Proved + Probable + Possible (3P). Proved + Probable (2P). Development planned. Proved (1P). Discovered Petroleum-Initially-in-Place. Technology proved. CONTINGENT RESOURCES.
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SPE/WPC/AAPG joint definitions PRODUCTION Producing RESERVES COMMERCIAL Being developed Proved + Probable + Possible (3P) Proved + Probable (2P) Development planned Proved (1P) Discovered Petroleum-Initially-in-Place Technology proved CONTINGENTRESOURCES Technology not proved Best Estimate SUB- COMMERCIAL PETROLEUM-INITIALLY-IN-PLACE Low Estimate HIgh Estimate Non commercial Unrecoverable PROSPECT PROSPECTIVE RESOURCES LEAD Undiscovered Petroleum-Initially-in-Place Best Estimate Low Estimate HIgh Estimate PLAY Unrecoverable Not to scale