Effects of Reservoir Boundary Conditions, Drainage Shape, and Well Location on Productivity of a Vertical Well

Table 9

Comparisons of productivity index of a well at the center of a closed rectangular reservoir calculated by Dietz’s method and Lu’s method.

Aspect ratio	Shape factor	PI calculated by Dietz’s Method (Equation 68) (STB/day/psi)	PI calculated by Lu’s Method (Equation 66) (STB/day/psi)
1	30.9	4.609	4.612
2	22.6	4.299	4.289
4	5.38	3.764	3.764
5	2.36	3.547	3.547
4.5	N/A	N/A	3.653