Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska.
American Association of Petroleum Geologists Bulletin
By: G. E. Claypool, C. N. Threlkeld, and L. B. Magoon
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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.
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 |
| Google Analytic Metrics | Metrics page |