ION Geophysical announces multi-client 3D seismic survey offshore Ireland ION Geophysical announced it is collaborating with Polarcus to acquire a new 4,000 sq. km. 3D multi-client seismic survey offshore southwest Ireland, the first major survey of the significantly underexplored deep-water Southern Porcupine Basin. Drilling results in the area have proven the existence of a petroleum system, and 2D seismic data indicates significant sediments and prospective structures. The survey will leverage the geological knowledge gained from ION's Northeast AtlanticSPAN 2D survey to deliver the high-quality 3D data required by oil and gas companies to further develop the area.