(Solved): reservoir engineering The following data are available for a tight naturally-fractured chalk reservo ...

The following data are available for a tight naturally-fractured chalk reservoir: STOIIP $=650$ MMSTB (Latest Volumetric Estimate) $P_i=7150$ psia (Initial reservoir pressure) $P_b=4500$ psia (Bubble point pressure) $B_{oi}=1.743\mathrm{rb}/\mathrm{stb}$, ( initial oil FVF) $B_{\mathrm{ob}}=1.850\mathrm{rb}/\mathrm{stb}$, (FVF at the bubble point) $C_w=3.0\times 10^{?6}/\mathrm{psi}$ $C_f=3.3\times 10^{?6}/\mathrm{psi}$ $S_{\mathrm{wc}}=0.43\mathrm{PV}$ $N_{pb}=43.473\mathrm{MMstb}$ (Oil recovery at the bubble point pressure) $W_p=0$ (Negligible water production) a-) Calculate the initial oil in place after 72 months of production. Please use the Havlena and Odeh straight line method for the computations. Furthermore, please also compute the gas saturation in the reservoir for each time entry. Make a plot of time (months) vs. gas saturation. b-) This time (using the same technique) ignore the water and rock compressibilities and calculate the initial oil in place and the gas saturation after 72 months of production.