1. For the 1D governing equation used in the reservoir
problem, the stability criterion is: or
Note: Stability depends on the ratio of t to (x)2
Maximum t allowed increases as x increases.

2. t Implicit Solution: Traditional Approach n+1 m+3 Iteration planes

3. x t Implicit Solution Spreadsheet Model: a different view of iteration
Time as a
spatial dimension t

4. Solution of the Reservoir Problem using a direct (matrix solution) as coded in the FORTRAN programs in Figures 5.1 and 5.2 in Wang and Anderson.
t = 10