Statistical Recovery Factor Calculation
Gas Reservoirs
Reservoir Name = Lower Hackberry A Sand 12/2/2011
Input Data
Average Depth = 11095 Est. Value
Effective Porosity (.24) = 0.22 Sgas = 0.67
Water Saturation( .35) = 0.33 Based on Arps statistical equations Tc = 370.264
Gas Gravity (.65) = 0.65 for typical sands and gases Pc = 671.432
in the Gulf Coast and GOM Tr = 1.731
H.D.Cowan (1993) Pr = 8.936
Form. Temp. (ºF) = 182 181 Pra = 6.702
Form. Pressure (Psig) = 6000 5103.7
Aban. Pressure (Psig) = 4500 static well conditions
Recovery Efficiency (%) = 62.50
Depletion Drive Water Drive
Initial Z = 0.9502 OGIP(MCF/AF) = 2240
Final Z = 0.9615 R. F. (MCF/AF) = 1344
OGIP(MCF/AF) = 2240 Calc. Eff. = 0.60
R. F. (MCF/AF) = 580 At Given Eff. = 1400
Calc. Eff. = 0.26
At Given Eff. (MCF/AF) = 1400
Oil Yield 94.2 Bbls/MMCF