Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska.
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Abstract
Two types of natural gas occurrences are present in the Cook Inlet basin. The major reserves (1.8 × 1011m3) occur in shallow (less than 2,300 m), nonassociated dry gas fields that contain methane with ^dgr13C in the range of -63 to -56 per mil. These gas fields are in sandstones interbedded with coals of the Sterling and Beluga Formations; the gas fields are interpreted as biogenic in origin. Lesser reserves (1.1 × 1010 m3) of natural gas are associated with oil in the deeper Hemlock Conglomerate at the base of the Tertiary section; associated gas contains methane with ^dgr13C of about -46 per mil. The gases associated with oil in the Hemlock Conglomerate are thermogenic in origin.
Suggested Citation
Claypool, G., Threlkeld, C.N., Magoon, L.B., 1980, Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska.: American Association of Petroleum Geologists Bulletin, v. 64, no. 8, p. 1131-1139, https://doi.org/10.1306/2F91944F-16CE-11D7-8645000102C1865D.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska. |
| Series title | American Association of Petroleum Geologists Bulletin |
| DOI | 10.1306/2F91944F-16CE-11D7-8645000102C1865D |
| Volume | 64 |
| Issue | 8 |
| Year Published | 1980 |
| Language | English |
| Publisher | American Association of Petroleum Geologists |
| Description | 9 p. |
| First page | 1131 |
| Last page | 1139 |
| Country | United States |
| State | Alaska |
| Other Geospatial | Cook Inlet Basin |