Imaging Using PP Multiples: Practical Applications for Shallow Imaging and 4D Monitoring on the Snorre Field, Norway.

Multiples are traditionally considered as noise for conventional data processing. However, it can be used for imaging in order to extend the illumination recovery. In this paper, we present the results of imaging using multiples on PRM datasets from the North Sea including two vintage surveys and minimal data pre-conditioning. For 4D analysis, the up-going wavefield is used as it is less affected by water layer variations. The images using multiples show very little footprint in the shallow overburden and, to some extent, an interpretable image in the large obstruction zones. We show that the images using multiples also contain the expected 4D effects, though the results seem to be contaminated with crosstalks. Finally, we propose to test the method on different wavefields recorded by the multicomponent system to demonstrate the robustness of the deconvolution imaging conditions and observe the difference in illumination provided by different components.