Page 471 - Petrophysics

RADIAL FLOW SYSTEMS 439

TABLE 7.1
VALUES OF THE SHAPE FACTOR FOR VARIOUS WELL LOCATIONS
AND DRAINAGE AREA SHAPES

System CA System CA
0 31.62 +j1 21.83

rl 30.88
0 4.51

31.6
2.08
// 27.6 2.69

mo. 0.232

27.1

0.1 15
t& 21.9

3.335
21.83

5.38 3.1 57

5
1 1 . I 2.36
0.581

F11 12.98
1
0.1 11
F{ 4.51
1

Kumar presented an equation giving the flow rate at any radius r
between r, and re 1211:

[ r," 121
q,=q 1-(1-f)- (7.65)

where q is the wellbore flow rate. If Equation 7.65 is substituted in Darcy's
law (Equation 7.52), and integration is carried out between r, and re,