Page 45 - Fundamentals of Reservoir Engineering

CONTENTS XLV

(p wf N − p wf n ) versus n ∆ q j ( t ) (7.76) 217

D
q − q N jN 1 q − q N p δ D n − t δ D − j 1
n
n
=+
∆ p (7.77) 225
1 versus log t ∆
1−
Ct
∆
162.6q B
µ
kh = o (7.78) 226
m

p − p k
−
S = 1.151 wf(1 hr) wf − log 2 + 3.23 (7.79) 226
−
11/ C t ∆ φµ cr w
m
∆ pF T ∆ pT
× = (7.80) 229
q F q

s.cc / sec r.cc / sec
Q Mscf / d

atm Mscf / d s.cc / sec r 3
( pp wf ) psi = µ ln e − + S
(8.1) 241
−
psi 2k mD D h ft cm r w 4
π

mD ft
711 Qµ ZT r 3
pp wf = ln e − + S (8.2) 242
−

khp r w 4
pp
+

p = wf (8.3) 242
2
pp
pp
+ +
µ = µ wf and Z = Z wf (8.4) 242
2 2
1422 Q ZT r 3
µ
2
p − p 2 wf = kh ln r w e − 4 + S (8.5) 242

711 Q ZT 4 .000264kt
µ
2
p − p 2 wf = ln + 2S (8.6) 242
i
kh γ φ µ i w 2
( ) c r
p pdp
mp 2 (8.7) 243
() =
p b µ Z
()
∂ mp 2p ∂ p
Then = (8.8) 248
r ∂ µΖ r ∂
()
∂ mp 2p ∂ p
and similarly = (8.9) 248
t ∂ µΖ t ∂