Well Productivity Index
Compute an oil well's productivity index (PI), PI = Q/(Pr − Pwf), the ratio of the produced rate to the pressure differential (drawdown) between the reservoir (Pr) and the bottomhole (Pwf). It measures how easily the well produces: a high PI indicates good permeability and reservoir connection. It is the basis of lift design and production forecasting. Enter the rate and the reservoir and bottomhole pressures.
Result
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Índice de produtividade do poço
O índice de produtividade (IP) mede a 'generosidade' de um poço: quantos barris por dia ele produz para cada psi de queda de pressão. IP = Q/(Pr − Pwf), onde a diferença Pr − Pwf é o drawdown — o quanto se 'puxa' a pressão no fundo do poço (Pwf) abaixo da pressão do reservatório (Pr) para fazer o óleo fluir. Um IP alto revela boa permeabilidade, espessura produtiva generosa e boa conexão poço-reservatório (sem dano de formação); um IP baixo sinaliza rocha apertada ou um poço 'machucado' que talvez precise de estimulação (acidificação, fraturamento). O IP é a base da curva de IPR (Inflow Performance Relationship), que prevê quanto o poço produzirá em diferentes pressões de fundo — informação essencial para projetar o sistema de elevação (bombas, gas lift) e otimizar a produção. Informe a vazão e as pressões de reservatório e de fundo.
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Pore Pressure Gradient
Compute a formation's pore pressure gradient by dividing the pore pressure by the vertical depth, in psi/ft (or kPa/m). The normal saltwater gradient is ~0.465 psi/ft; higher values indicate overpressure (dangerous, can cause kicks and blowouts) and lower ones, underpressure. It is a critical drilling-safety parameter, since it sets the mud weight needed to balance the formation. Enter the pore pressure and the vertical depth.
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.