n=b
di
3.026464471 0.125631264
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
t
Month
Dec-90
Jan-91
Feb-91
Mar-91
Apr-91
May-91
Jun-91
Jul-91
Aug-91
Sep-91
Oct-91
Nov-91
Dec-91
Jan-92
Feb-92
Mar-92
Apr-92
May-92
Jun-92
Jul-92
Aug-92
Sep-92
Oct-92
Nov-92
qt
(stb/month)
213
1033
1520
1453
1334
1284
1077
1081
1057
973
962
924
953
904
829
869
806
889
822
840
829
785
753
763
Np(actual) =
21707
qi
1561
R2
0.969997
t
qt
qt'
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1520
1453
1334
1284
1077
1081
1057
973
962
924
953
904
829
869
806
889
822
840
829
785
753
763
1561
1403
1295
1214
1150
1098
1054
1016
984
955
929
906
885
866
848
832
817
803
790
778
766
755
745
23
24
After 10 years(from Nov-92):
25
26
q(STB/m)=
416.1 , t = 10*12+21=141 months
27
Np(STB)=
62604.2 , @ t= 141months 28
Np(actual) =
21707.0 , for the first 21 months
29
30
31
32
33
34
35
36
37
38
39
735
726
717
709
701
693
686
679
672
666
660
654
648
642
637
632
627
q avag
987
SSE
31362
(qt-qt')^2 (qt-qtavg)^2
1640
2511
1559
4965
5285
274
10
1873
469
951
564
4
3132
9
1785
3196
23
1340
1494
51
172
57
284458
217471
120637
88396
8161
8896
4943
186
608
3925
1138
6837
24805
13853
32570
9586
27125
21571
24933
40680
54509
50033
62435
SST
1045322
Np
STB
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
622
617
612
608
603
599
595
591
587
584
580
576
573
569
566
563
560
556
553
550
547
545
542
539
536
534
531
529
526
524
521
519
517
514
512
510
508
506
504
502
500
498
496
494
492
490
488
486
485
483
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
481
479
478
476
474
473
471
470
468
467
465
464
462
461
459
458
456
455
454
452
451
450
448
447
446
445
443
442
441
440
438
437
436
435
434
433
432
430
429
428
427
426
425
424
423
422
421
420
419
418
140
141
417
416
q (STB/month)
q vs. time
1800
1600
1400
1200
1000
800
600
400
200
0
0
20
40
60
80
100
120
140
160
Time
q vs. time
y = -1.0141x + 35048
R² = 0.8099
q (STB/month)
10000
1000
100
Series1
10
1
Nov-90
Linear (Series1)
Jun-91
Dec-91
Time
Jul-92
Jan-93