Paper submitted to IMAGE 2026, by Jun Sun, Brahma Mekala, Zhaojun Liu, Manhong Guo, Graeme Stock (TGS).
Abstract
Simultaneous-source one-sided wide-azimuth (WAZ) acquisition has become an effective strategy for improving illumination in geologically complex frontier areas, but its alternating NAZ/WAZ shot pattern introduces challenges for conventional FK-domain deblending workflows. Existing methods such as ISTA assume uniformly sampled 3D shot volumes, an assumption violated by the interleaving and occasional irregularity of shots from dual-vessel acquisition. This paper introduces a new deblending approach that separates NAZ and WAZ shot gathers into two coherent sub-volumes, enabling effective FK-domain sparsity and high-fidelity reconstruction despite increased shot spacing. Results from an Angola 3D survey demonstrate that this strategy preserves data quality and is well suited for modern multi-vessel acquisition geometries.
Read the full article here.