Paper submitted to SEG 4D Forum - Insight to Actions, by D. Lecerf, K. Helgebostad, B. Caselitz (TGS) and A. Lafram (TotalEnergies)
Summary
This paper presents a dedicated 4D formulation of Full Wavefield Migration (FWM). The method, which makes use of both primary reflections and multiples for imaging, is applied and validated for Ocean Bottom Node (OBN) monitoring surveys. The aim of this 4D imaging study is to significantly reduce processing/imaging runtime without compromising the 4D image quality. A pilot test, using deepwater West Africa OBN dataset, demonstrates that effective 4D imaging can be achieved with fewer nodes and a shorter turnaround.