Acreage Opportunities in Otway Basin
TGS’s broadband prestack depth reprocessed multiclient 2D & 3D data set was completed in 2019.
The Otway Basin is one of a series of Late Jurassic to Tertiary basins that developed along the southern margin of Australia in response to the break-up of Eastern Gondwana. It covers ≈150,000 km2, 80% which lies offshore extending over 500km from the southeast of South Australia along the southwest coast of Victoria to King Island in Tasmanian waters. The basin is divided into 5 major depocentres with only two proving successful over the last 40 years. About 40 gas fields have been discovered to date, the majority are onshore with ongoing discoveries currently in the Penola Trough (Hazelgrove, Dombey & Nangwarry, SA). Historically the Port Campbell Embayment has provided the most, (about 20), which is essentially at the northern end of the Shipwreck Trough which runs southward offshore. This N-S Upper Cretaceous depocentre is currently mapped as about 100km long and 25km wide with 10 fields in production and two recent discoveries, Halladale/Blackwatch and Annie now under appraisal for development.
Click map to view more details in the TGS Data Library
The area continues to have exploration success and there is a tight gas market on the East Coast or Australia. Being close to the gas markets of Eastern Australia means there is a favourable commercial environment. Existing pipeline and onshore gas processing infrastructure further improves potential for development of future discoveries.
TGS believes this large area has significant untapped potential offering multiple opportunities with significant upside.