Single sensor and 1ms recording for improved imaging in the shallow subsurface

SUMMARY

Site investigations, for instance, in the emerging field of CCS (Carbon Capture and Storage), benefit from improved resolution in the overburden compared to traditional seismic surveys.

This is typically achieved by recording data at a 1ms sample rate. However, the resolution of the imaged data does not only depend on the resolution in time but also on the spatial sampling. As such, streamers which form analogue groups may lose much of the anticipated uplift in the imaged data at higher frequencies.

This paper describes the improved resolution from using single-sensor recorded data rather than analogue group-forming, as shown on a 1ms dataset acquired in the Norwegian North Sea.