Marine geophysics, seismic surveys, subsurface imaging | Petroleum Geo-Services | PGS PGS gathers offshore survey data globally and uses vast cloud compute to image the earth and advances marine subsurface knowledge for evolving energy needs. PGS share is listed on the Oslo Stock Excha PGS services include marine seismic and electromagnetic (EM) data acquisition, imaging, reservoir services, and a MultiClient data library.