MARINE SURVEYS CONDUCTED WITH MULTIPLE SOURCE ARRAYS

摘要

Marine surveys carried out with multiple source arrays comprising three or more sources are discussed. Each source of a multiple source array is an array of source elements, such as air guns. The sources of a multiple source array may be arranged in particular type of configuration that is effectively maintained while the survey vessel travels a sail line. The sources of the multiple source array are activated to acoustically illuminate a subterranean formation with acoustic signals. Two or more sources of a multiple source array may be activated to create blended seismic data. Methods to deblend, source deghost, and attenuate noise in the blended seismic data obtained by using a multiple source array are also discussed.

主权项

1. A method to deghost marine seismic data created using a multiple source array, the method comprising:
sorting seismic data into a common-receiver-station gather of traces, one or more of the traces associated with one or more sources of the multiple source array activated below a free surface and one or more of the traces associated with one or more source ghosts that correspond to the sources of the multiple source array; transforming the common-receiver-station gather from a space-time domain to a wavenumber-frequency domain; and muting seismic data with corresponding wavenumbers greater than zero to generate a source-deghosted common-receiver-station gather without reflection events associated with source ghosts of the multiple source array.