Seismic stratigraphy of the Late Permian Tinowon Formation, Surat Basin, Australia : new opportunities in a mature basin

Abstract

The Myall Creek and Riverside gas fields were recently discovered in the Surat Basin. The discoveries were only 2km apart, yet are contained in two separate sand units within the Late Permian Tinowon Formation: the Upper Tinowon Sandstone and Mid Wallabella Sandstone. The DST data of the discovery well of the Myall Creek Field suggest the reserves are greater than the mapped structure could hold invoking a strong stratigraphic trapping mechanism. A post-drill interpretation of the reprocessed seismic data has resolved each sand unit. The distribution of the channel sand, which hosts the Riverside Field, has been mapped and the extent of the stratigraphic trap of the Myall Creek Field is delineated. Both cases open new opportunities for prospects of their respective play types.