Question 1 (10 Marks) As shown in figure below, the reservoir has two different flow boundaries on both sides of geometry, Ax = 1000 ft, ay = 750 ft, Az = 50 ft, B = B = 1RB/STB, C = 1.6 x 10-" psi kx = 50 md, 0 = 0.27, Fe = 0.001127, /4 = 30 cp,ac = 5.615. The initial reservoir pressure is 4500 psi. Generate a system of finite- difference equations for the first timestep of (Implicit) formulation for At =15 days of one month of production. Other values and the necessary boundary conditions are illustrated in the Figure 1. Let partial differential equation ** (BA%).ax + qsc = V ; aB' at 50 STB/D 80 STB/D/ No-flow boundary is Ap 31 MB Ox i : * 1 2 3 5 JP =0 Ox Figure 1