Acquisition, processing, and analysis of shallow, high-resolution seismic data from the outer continental shelf and upper slope, offshore Louisiana

Citation
Se. Nissen et al., Acquisition, processing, and analysis of shallow, high-resolution seismic data from the outer continental shelf and upper slope, offshore Louisiana, J SED RES, 69(2), 1999, pp. 300-316
Citations number
15
Categorie Soggetti
Earth Sciences
Journal title
JOURNAL OF SEDIMENTARY RESEARCH
ISSN journal
15271404 → ACNP
Volume
69
Issue
2
Year of publication
1999
Part
B
Pages
300 - 316
Database
ISI
SICI code
1527-1404(199903)69:2<300:APAAOS>2.0.ZU;2-4
Abstract
Shallow, high-resolution multichannel 2-D seismic data, with acquisition pa rameters designed to image core- and outcrop-scale stratigraphic features, were collected across the outer shelf and upper slope, offshore Louisiana. Errors during seismic acquisition led to complications in data processing; however, the quality of the processed data was still excellent. Frequencies up to 1000-1200 Hz were recovered from the subsurface to approximately 150 -250 ms (112.5-187.5 m) below the sea-Boor, permitting resolution of beds a s thin as 0.4 m, Frequencies of 400 Hz or greater are needed to resolve the detailed internal geometry of the middle to upper Pleistocene shelf-edge d eltas targeted by this study, where the average spacing between the major d eltaic clinoform reflections is approximately 2 ms (1.5 m), The deltaic cli noforms dip at angles up to 8 degrees, and may be spatially aliased at freq uencies above 854 Hz at the 3.125 m CDP spacing of this survey. A CDP spaci ng of 2.2 m or less would be required in order to avoid spatial aliasing of the 1200 Hz events at a dip angle of 8 degrees.