Gas Production from the Debolt/Elkton

Gas production from the Debolt Formation and Elkton Member is concentrated along porous wedge edges from southern through to northern Alberta, as well as in northeast B.C. and in the foothills disturbed belt. Included are fields producing from the Turner Valley, Debolt, Livingstone and Mt. Head formations and the overlying Stoddart Group. There is no gas production from this zone in Saskatchewan.

There are 55 Debolt/Elkton gas fields with Initial Established Marketable Gas Reserves of over 1000 x 10⁶m³ (35 BCF). The ten largest Debolt/Elkton gas fields, listed in order of Initial Established Marketable gas reserves, are shown in Table 1. Cumulative production data for Alberta and British Columbia are updated to the end of 1990.

Table 1- Ten Largest Debolt/Elkton Gas Fields (in units of 10⁶m³)

**Initial Established**
No.	Field	Stratigraphic Unit	No. of Pools	Marketable Reserves	In-place Volume	Cumulative Production	Discovery Year
1	Waterton	Rundle/Livingstone	10	65,563	123,223	49,159	1956
2	Jumping Pound W	Rundle/TV	5	52,701	77,215	26,645	1960
3	Crossfield	Rundle/TV	13	51,057	67,267	44,493	1951
4	Edson	Elkton	4	43,391	56,756	38,116	1961
5	Brazeau River	Elkton-Shunda	2	36,800	49,638	26,583	1959
6	Harmattan East	Rundle/TV	3	29,894	42,490	16,936	1954
7	Dunvegan	Debolt	24	29,487	39,066	16,437	1952
8	Harmattan-Elktn	Rundle/TV	3	27,864	41,240	11,466	1953
9	Carstairs	Elkton	2	23,916	30,339	21,784	1958
10	Wildcat Hills	Rundle/Livingstone	1	22,000	29,411	16,756	1958

The Waterton, Jumping Pound West and Wildcat Hills gas fields occur in structural traps in the foothills disturbed belt of southern and central Alberta. The remaining seven are located at porous wedge edges within the Stoddart to Elkton interval.

Total recoverable gas reserves in the Debolt/Elkton are estimated at 499.0 x 10⁹m³, of which 233.0 x 10⁹m³ (i.e. 47%) have already been produced. Initial Established In-Place Volume of Debolt/Elkton gas reserves totals 956.8 x 10⁹m³. There are a total of 409 Debolt/Elkton gas pools, with an average 120 x 10⁶m³ recoverable gas reserves/pool Table 2 lists the distribution of Debolt/Elkton gas reserves according to In-Place Pool Size.

Table 2 - Size Distribution of Debolt/Elkton Gas Pools (in units of 10⁶m³)

In-Place Pool Size Class	No. of Pools	Recoverable Reserves	Cumulative Production
1.0 to 10	14	49	9
10 to 100	124	4,039	614
100 to 1000	190	41,819	8,620
1000 to 10000	62	95,535	25,016
over 10000	19	357,555	198,694
Total	409	498,996 x 10⁶m³	232,953 x 10⁶m³

Last modified: August 14, 2008