First 3-D Dual-sensor Streamer Acquisition in the North Sea – An Example from the Luno Field

In 2009, the first 3-D dual-sensor towed streamer survey in the North Sea was acquired over the Luno field. This field presents a challenging area for seismic imaging that requires the best possible resolution to image the complexity of the reservoir, together with maximum signal penetration due to the presence of an overlying chalk interval. Dual-sensor technology is therefore attractive due to its ability to remove the receiver ghost, thereby increasing the usable bandwidth, which further permits increased towing depth to improve the low frequency signal-to-noise. In this paper, the acquisition and processing of this dataset will be reviewed. It will be shown that, in addition to the data quality benefits, deep towed dual-sensor acquisition has a number of operational advantages over conventional acquisition. In particular, dual-sensor streamer operations are less susceptible to weather-related noise and seismic interference.