Gas and gas hydrate distribution around seafloor seeps in Mississippi Canyon, Northern Gulf of Mexico, using multi-resolution seismic imagery
Marine and Petroleum Geology
By: W.T. Wood, P. E. Hart, D. R. Hutchinson, N. Dutta, F. Snyder, R.B. Coffin, and J.F. Gettrust
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Abstract
To determine the impact of seeps and focused flow on the occurrence of shallow gas hydrates, several seafloor mounds in the Atwater Valley lease area of the Gulf of Mexico were surveyed with a wide range of seismic frequencies. Seismic data were acquired with a deep-towed, Helmholz resonator source (220-820 Hz); a high-resolution, Generator-Injector air-gun (30-300 Hz); and an industrial air-gun array (10-130 Hz). Each showed a significantly different response in this weakly reflective, highly faulted area. Seismic modeling and observations of reversed-polarity reflections and small scale diffractions are consistent with a model of methane transport dominated regionally by diffusion but punctuated by intense upward advection responsible for the bathymetric mounds, as well as likely advection along pervasive filamentous fractures away from the mounds.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Gas and gas hydrate distribution around seafloor seeps in Mississippi Canyon, Northern Gulf of Mexico, using multi-resolution seismic imagery |
| Series title | Marine and Petroleum Geology |
| DOI | 10.1016/j.marpetgeo.2008.01.015 |
| Volume | 25 |
| Issue | 9 |
| Year Published | 2008 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Marine and Petroleum Geology |
| First page | 952 |
| Last page | 959 |
| Google Analytic Metrics | Metrics page |