More about Discovery Process Models
85
Impact of Nonproductive and Noncommercial Pools
The areal extent of a play does not directly infl uence the pool-size distribution derived from the two discovery process methods LDSCV and
NDSCV. In cases when the additional area includes wildcats with substantial drill stem test recoveries that might become pools with additional development, the play area might increase because more pools are
included. Therefore, play area is not a direct factor infl uencing pool-size
distribution. In this aspect, the models differ from the methods of Arps
and Roberts (1958), and Drew (1990; Drew et al., 1980, 1982).
100000
100000
10000
10000
1000
1000
100
1000
800
600
400
In-Place Volume, 10 9
m 3
200
241
Pre-1983
Pre-1994
702
772
95th to 5th percentile
Total play resource
292
0
100
10
61 71 73 74 75 76 78 79 82 85 89 91
Pre-1994
Pre-1983
61 71 72 73 74
75 76 78 79
In-Place Pool Size, 10 6
m 3
A
B
Figure 4.17. (A, B) Gas pools of the Devonian Swan Hills Shelf Margin play (A),
divided into two time windows. (B) Play resource distributions after evaluation
by LDSCV displayed as upper 95th percentile (lower end), 5th percentile (upper
end), and the mean (circle). Data from the Western Canada Sedimentary Basin.