Reservoir Recovery Factor
Compute a reservoir's recovery factor, RF = (Np/N)·100%, the fraction of the original oil (N, or OOIP) that will actually be produced (Np). It is one of the most important — and uncertain — numbers in the industry: primary recovery (natural energy) is usually 5–15%; with secondary recovery (water/gas injection) it rises to 30–50%; and advanced methods (EOR) can go further. It defines the field's economic value. Enter the cumulative production and the original oil in place.
Resultado
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Fator de recuperação do reservatório
Aqui está a verdade incômoda do petróleo: a maior parte dele fica no subsolo. O fator de recuperação FR = (Np/N)·100% mede que fração do óleo original (N, o OOIP) será de fato extraída (Np). E os números são humildes: a recuperação primária, que usa apenas a energia natural do reservatório (gás dissolvido, capa de gás, influxo de água), tira tipicamente só 5 a 15%. A recuperação secundária — injetar água ou gás para varrer o óleo e manter a pressão — eleva para 30 a 50%. E os métodos avançados (EOR: injeção de vapor, polímeros, CO₂, surfactantes) podem espremer mais alguns pontos, a custo alto. Cada ponto percentual de recuperação, num campo gigante, vale bilhões — por isso a indústria investe tanto em entender e melhorar esse número. O FR é também o que separa o óleo presente (geológico) das reservas (economicamente produzíveis). Informe a produção acumulada e o óleo original in place.
Related Tools
Recoverable Oil Reserves
Compute the recoverable oil reserves by multiplying the original oil in place (OOIP) by the recovery factor (%). While the OOIP is the total volume present in the rock, only a fraction is technically and economically extractable — those are the reserves that actually have value and enter oil companies' books. It is the number behind asset valuations and investment decisions. Enter the OOIP and the recovery factor.
Oil in Place (OOIP)
Compute a reservoir's original oil in place (OOIP) by the volumetric method, OOIP = 7758·A·h·φ·(1−Sw)/Boi, in stock-tank barrels (STB). It combines the reservoir area (acres), the porous thickness (ft), the porosity (φ), the water saturation (Sw) and the oil formation volume factor (Boi). The constant 7758 converts acre-feet into barrels. It is the basis of any oil-field evaluation. Enter the area, thickness, porosity, water saturation and Boi.
Mining Recovery
Compute the mining recovery, R = (mined ore / in-situ ore)·100%, the fraction of the ore originally present in the deposit that is actually extracted. Not all ore is recoverable: support pillars, blasting losses and contacts leave part behind. Together with dilution, it defines the extraction efficiency and the mineable reserves. Enter the mined ore and the in-situ ore.
The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.