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PESA Vic/Tas March Technical Meeting

Wednesday, March 21 @ 12:00 - 14:00

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Guest Speaker: Andre Coffa (immediate past PESA Vic/Tas Branch President)

Andre A Coffa has a PhD in basin analysis, sedimentology and stratigraphy of the Russian Permian. He has twenty years’ experience in the energy sector beginning his career with Shell International’s research laboratory. He subsequently worked in deep water exploration, onshore development, near shore appraisal in diverse operating countries such as the USA, Egypt, Oman, The Netherlands, Malaysia and Brazil. He has conducted Play Based Exploration studies for large, medium and small companies in the Middle East, Brazil, Indonesia, The Philippines, Australia, New Zealand and Myanmar. He is currently Principal Exploration Geologist for Bridgeport Energy, focusing on the onshore Cooper-Eromanga, Surat and Otway basins of Australia.

The Cooper-Eromanga is the most prolific onshore oil and gas basin in Australia. There are at least fourteen prospective stratigraphic zones for explorers to target. Within those zones there are multiple plays that have produced hydrocarbons. The most prolific is the South Australian sector or Western part of the basin. Although the south eastern part of the Cooper-Eromanga Basin has produced some large fields, the eastern and north eastern part of the basin is considered less prospective. The area could also be considered under-explored. Due to the wide scope and vast potential of the area, new approaches to exploration need to be adapted if new material discoveries are to be made.

Much of the acreage in the Eastern Cooper-Eromanga Basin is held by small oil and gas exploration companies. Often their exploration teams lack a consistent method for acquiring premium acreage, assessing it and making commercial discoveries. Play Based Exploration (PBE) was recognised by Bridgeport Energy as the way to explore for oil and gas. PBE is an evaluation method to understand the fundamental logic of HC plays, as a sound technical basis for ranking and prioritizing all exploration projects and activities. It is a basin and play approach to assessing the principal hydrocarbon system elements resulting in evidence-based “sweet-spot” maps to guide decision makers.

The use of PBE to assess the eastern Cooper-Eromanga Basin had immediate impact on Bridgeport’s view by highlighting areas of greater interest based on well ‘look-backs’ and consistent rigorous mapping. The results allowed management to make informed decisions regarding top tier vs. non-prospective areas. It was used to recommend which are the higher value permits, which permits require more work, and which permits may be relinquished. Subsequently, by having clear evidence for decision makers to allocate investment, the technical team was able to determine which gazetted permits supported bids, which existing tenements required additional seismic data, and which prospects should progress directly to drill-ready status.

The whole approach provided greater technical rigour and hence quicker and more confident decisions, even with partial or incomplete data. Portfolio growth and maturity was achieved by effective assessment at the basin play level and a substantially improved understanding of the petroleum system as a whole. In addition, Bridgeport’s permits in the Cooper now have full common risk segment and sweet spot maps for each play, with supporting technical work for external and internal stakeholders to make use of in potential investment opportunities.


Wednesday, March 21
12:00 - 14:00


Henry & The Fox
525 Little Collins Street, Melbourne, Victoria 3000 Australia


(03) 8199 0317
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