1887

Abstract

Significant gains in productivity (and savings on survey time and cost) have recently been achieved using simultaneous sources with high-density Ocean Bottom Cable geometries. However, where the acquisition is receiver-bound, using sparse Ocean Bottom Node (OBN) arrays for example, the argument for use of simultaneous sources is less compelling. Time and motion analysis for a rolling array of sparse OBN, spaced by 390 m with a 30x30 m shot carpet, shows that time savings of the order of 10 % of the equivalent single-source survey duration should be expected. Although small this may be significant in tightly constrained acquisition seasons. Since time-lapse surveying is the main motivation for many sparse OBN acquisitions, the saving in survey time must be balanced against the risk of additional 4D noise created by simultaneous-source crosstalk. Attenuating crosstalk using a new form of Radon operator implemented with cascaded fx prediction and interpolation as part of a kill-fill process, the level of 4D noise created by simultaneous sources is reduced to an ambient level of 6 %, with a highly randomized character, after imaging.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201412873
2015-06-01
2024-03-28
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201412873
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error