pgs4dINDUSTRY INSHTS September 18 By Andrew Long (Andrew.Long@) 1 of 8 A Clearer Image │ 4D Inshts from SEG 2018 In this paper I review most of theUnderstanding new details in the 4D seismic snal uncovered by a broadband time-lapse dataset at Gullfaks Main Field in the North Sea. The Gullfaks area is in Block 3410