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The following PVT data are from a volumetric reservoir at an initial pressure of 2000 psia. (Average connate water=25%). Assume negligible rock and water compressibility. Answer questions A,B and C below:-

A. The reservoir is initially :- 1. -Saturated reservoir 2. -Under-saturated reservoir 3. -Gas cap reservoir B. When the reservoir pressure fell to 1500 psia,

the cumulative production of oil and gas were 7.5 MMSTB and 9.5 MMMscf respectively. The initial oil in place is:- 1. 56 x 10^6 STB 2. 169 X 10^6 STB 3. 260 X 10^6 STB

C. The initial reservoir pore volume is:- 1. 325.5 x 10^6 bbl 2. 225.5 X 10^6 bbl 3. 125.5 X 10^6 bbl 4. 425.5 x 10^6 bbl

P (psia) bbl/STB 1.4446 Rs SCF/STB 885 Bg bbl/SCF 2000 1725 1.4509 885 1700 1600 1500 1.4468 1.4303 1.4139 876 842 807 0.00141 0.00151 0.00162