Table 13.35b

Reports

Reports

Table 13.35b

Chapter 13 Table Gas Production from the Wabamun Group

View Table 13.35b as an image.

Gas production from the Wabamun Group is primarily derived from Crossfield Member stratigraphic traps in southern Alberta, structural traps in the foothills and from unconformity edge traps in east-central Alberta.

There are nineteen Wabamun gas fields with Initial Established Marketable Gas Reserves of over 1000 x 106m3 (35 BCF), 17 in Alberta and 2 in British Columbia. The ten largest Wabamun gas fields, listed in order of Initial Established Marketable gas reserves, are shown in Table 1. Cumulative production totals include Alberta and British Columbia data released to December 31, 1990.

Table 1. Ten Largest Wabamun Gas Fields (in units of 106m3).

Initial Established
No. Field Formation No. of Pools Marketable Reserves In-place Volume Cumulative Production Discovery Year
1 Nevis Wabamun 2 17,195 36,774 17,170 1952
2 Crossfield Crossfield 1 13,573 37,725 11,282 1954
3 Crossfield E Crossfield 2 12,450 34,424 10,254 1959
4 Lone Pine Creek Crossfield 3 9,067 16,500 6,795 1954
5 Pine Creek Wabamun 4 8,303 14,873 6,498 1955
6 Okotoks Crossfield 3 6,146 25,939 4,027 1950
7 Parkland Wabamun 2 5,859 6,510 3,057 1955
8 Garrington Wab'n sol'n 3 5,800 10,588 4,536 1951
9 Limestone Wabamun 3 3,963 7,606 1,564 1974
10 Waterton Wabamun 6 2,447 3,937 314 1957

Four of these ten largest Wabamun gas fields occur m Crossfield Member stratigraphic traps and result from updip porosity pinchout due to increasing anhydrite content. The Limestone and Waterton fields occur in structural traps m the foothills. The Parkland field is in northeastern B.C. Many smaller Wabamun gas fields are present along the eroded Wabamun unconformity edge m eastern Alberta.

Total recoverable gas reserves in the Wabamun Group are estimated at 102.8 x 109m3 of which 53.5 x 109m3 (i e. 52%) have already been produced. Initial Established In-Place Volume of Wabamun gas reserves totals 260.6 x 109m3. There are a total of 338 Wabamun gas pools, with an average 304 x 106m3 recoverable gas reserves/pool. Table 2 lists the distribution of Wabamun gas reserves according to In-Place Pool Size.

Table 2. Size Distribution of Wabamun Gas Pools (in units of 106m3).

In-Place Pool Size Class No. of Pools Recoverable Reserves Cumulative Production
1.0 to 10 28 85 31
10 to 100 162 3,818 627
100 to 1000 122 25,684 5,739
1000 to 10000 21 27,168 14,515
over 10000 5 46,093 32,544
Total 338 102,848 x 106m3 53,456 x 106m3