Shipwreck and Sherbrook supersequence regional gross depositional environments, offshore Otway Basin

• DOI: 10.1071/ep23197
• Publication Date: 2024-05-16T00:10:49Z
• Authors: Steve Abbott; Chris Cubitt; George Bernardel; Chris Nicholson; Duy Nguyen
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

The Shipwreck and Sherbrook supersequences together constitute the upper Cretaceous succession in Otway Basin that was deposited during an extensional basin phase. In Trough, where is well explored, gas fields are hosted by Supersequence (SS). Elsewhere, interval lightly deep-water area considered exploration frontier. We present regional gross depositional environment (RGDE) maps for LC1.1 LC1.2 sequences of SS, LC2 SS. Fluvial Plain, Coastal-Delta Plain Shelf RGDEs were interpreted from wireline logs, cores, seismic facies. mostly restricted to inboard platform areas inner Morum Sub-basin. mud-prone RGDE widespread across Nelson depocentres. extent belts progressively increases up-section, imparting a regressive aspect succession, delineating large fluvial-deltaic complex north-west basin. Thick seal development greater potentially mature source rocks basin, thick reservoir hanging wall growth faults Sub-basin insights derived this study, will inform selection detailed mapping, formulation new hydrocarbon carbon dioxide storage plays, inputs petroleum systems modelling.