Q3/A/Calculate depletion-drive index for undersaturated reservoir.
Given:
Bti = 1.348
Bt = 1.365
Connate water Cw = 0.27
Bw = 3.76E-06
Cf = 1.07
Pi = 7E-06
P = 4800 psi
Np = 3600 MSTB
Wp = 1500000 MSTB
We = 50000 MSTB
Q3/B/For these field production and PVT data:
Average pressure psi: 4150, 3900, 3601, 3100, 2600
Bo bbl/STB: 1.3102, 1.3105, 1.3129, 1.315, 1.317
Np MSTB: 0, 0, 201.5, 890.7, 1691.89, 2575.33
Wp MSTB: 0, 0, 0.159, 5.008
Sw = 24%
Cw = 3.62x10-6
Cf = 4.95x10-6
Bw = 1 bbl/STB
Estimate the initial oil in place by MBE straight line method.