Diketahui :rw = 2,875 inch = 0,239583 ftq = 125 STB/DPwf = 1800 psiP rata-rata = 2200 psih = 18 ftre = 1700 ftµ = 0,6 cpB = 1,76 RB/STBkeff = 175 md (NIM)

Prata−rata−Pwf=141,2q .μ .Bk .h ( ln

ℜrw

−34+S)

2200−1800=141,2(125 ) . (0,6 ) .(1,76)

(175 ) .(18) ( ln1700

0,239583−

34+S)

400=5,91695 (8,86724−0,75+S )67,60237=8,86724−0,75+SS=67,60237−8,86724+0,75

S=59,4851Harga skin positif (59,4851) menunjukkan bahwa sumur DAMAGED.

Diketahui :ri = 1300 ftk = 130 mdΦ = 0,13Ct = 1,5 x 10-5 psi-1

µ = 13 cpditanya :t (hari) … ?Penyelesaian :

ri=( k . t948.∅ . μ .C t )

1 /2

t=ri2.948 .∅ . μ .C t

k

t=13002 .948 .0,13. 13.1,5 x10−5

130

t=40613,742130

=312,4134 jam=13,01723hari