Coil Shooting single-vessel full-azimuth (FAZ) acquisition is a technique which extends conventional multi- and wide-azimuth (MAZ and WAZ) survey capabilities by acquiring marine seismic data using a single vessel sailing in a series of overlapping, continuously linked circles. This delivers a greater range of azimuths and offsets than parallel WAZ geometries, resulting in better target illumination without non-productive intervals for line changes. The WesternGeco application of this technique is enabled by the Q-Marine point-receiver marine seismic system:
Typically, WAZ surveys are conducted using three or four vessels, each traveling in parallel lines; however, while conducting a project in the Gulf of Mexico (GoM), WesternGeco achieved high-quality FAZ recordings with a single vessel acquiring seismic while following a circular path. WesternGeco continues to lead the way, streamlining and enhancing techniques with customer needs in mind. Dual Coil Shooting multivessel full-azimuth acquisition uses multiple source and receiver vessels sailing in interlinked circles and offers ultra-long offset FAZ data.