1887
2nd Australasian Exploration Geoscience Conference: Data to Discovery
  • ISSN: 2202-0586
  • E-ISSN:
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Abstract

Summary

The Braveheart-1/ST1 well (2009) was drilled on a pronounced Class III AVO anomaly identified on the Braveheart 2D and Braveheart infill 2D seismic data in the Browse Basin, Australia. The well was dry with no indication of hydrocarbons. During a post-drilling analysis of the well, the seismic synthetics generated displayed no Class III AVO anomaly at the well location. The failure of seismic to predict a correct AVO response at the well raised major questions around the legitimacy of AVO and Quantitative Interpretation (QI) approach for prospect generation and maturation in the Browse Basin.

In 2011, Searcher Seismic acquired the long offset (8km) Vampire 2D seismic survey in the Browse Basin that tied 60 wells (including Braveheart-1/ST1). The assessment of the Vampire PSDM (2018) data at Braveheart-1/ST1 reveals that the Class III AVO anomaly is absent. Looking back at the well result it is likely that the generated Class III AVO in the vintage 2D data was caused by insufficient acquisition parameters and an inappropriate processing workflow.

This paper demonstrates how the acquisition of long streamer seismic, with appropriate processing could help to avoid misidentification of false AVO anomalies and also help identify true AVO anomalies, which have been masked by unsuitable acquisition and processing workflows. This paper could help support a more successful drilling program.

The Vampire long streamer 2D PSDM seismic data with preserved amplitude, provides great opportunities for the geoscientist to reassess the exploration potential in the Browse Basin. Using this dataset with 60 well ties also offers profound opportunities to run a 3-term AVO Inversion for reservoir characterisation and field development planning of the main fields in the Browse Basin.

© 2019 Taylor and Francis Group LLC
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/content/journals/10.1080/22020586.2019.12073041
2019-12-01
2026-01-18

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References

  1. Barber, P.M., 2013, Oil Exploration Potential in the Greater Northern Australian—New Guinea Super Gas Province: Proceedings of the Petroleum Exploration Society of Australia Symposium, Perth, 2013.
  2. Blevin, J.E., Struckmeyer, H.I.M., Boreham, C.J., Cathro, D.L., Sayers, J. and Totterdell, J.M., 1997, Browse Basin high resolution study. Interpretation report, North West Shelf, Australia. AGSO Record, 38.
  3. Blevin, J.E., Struckmeyer, H.I.M., Cathro, D.L., Totterdell, J.M., Boreham, C.J., Romine, K.K., Loutit, T.S., Sayers, J. and Purcell, P., 1998, Tectonostratigraphic framework and petroleum systems of the Browse Basin, North West Shelf: Proceedings of Petroleum Exploration Society of Australia Symposium, Perth, 1998.
  4. Brincat, M.P., Lisk, M., Kennard, J.M., Bailey, W.R. and Eadington, P.J., 2003, Evaluating the oil potential of the Caswell Sub-basin: insights from fluid inclusion studies: Proceedings of the Timor Sea Symposium, Darwin, 2003.
  5. Exoil Ltd, 2010, Braveheart-1 & ST1 well completion report. Exoil Ltd (unpublished).
  6. Hocking, R.M., Mory, A.J. and Williams, I.R., 1994, August. An atlas of Neoproterozoic and Phanerozoic basins of Western Australia: Proceedings of Petroleum Exploration Society of Australia Symposium, 1994, Perth.
  7. Lawrence, S., Thompson, M., Rankin, A., Alexander, J., Bishop, D. and Boterhoven, B., 2014, A new structural analysis of the Browse Basin, Australian North West Margin. The APPEA Journal, 54(1), 1-10.
  8. Longley, I.M., Buessenschuett, C., Clydsdale, L., Cubitt, C.J., Davis, R.C., Johnson, M.K., Marshall, N.M., Murray, A.P., Somerville, R., Spry, T.B. and Thompson, N.B., 2002, October. The North West Shelf of Australia–a Woodside perspective: Proceedings of the Petroleum Exploration Society of Australia Symposium, Perth, 2002.
  9. Radlinski, A.P., Kennard, J.M., Edwards, D.S., Hinde, A.L. and Davenport, R., 2004, Hydrocarbon generation and expulsion from Early Cretaceous source rocks in the Browse Basin, North West Shelf, Australia: a small angle neutron scattering study. The APPEA Journal, 44(1), 151-180.
  10. RPS Energy, 2008, Competent Person’s Report on WA-332-P and WA-333-P Permits, Browse Basin, Australia. RPS Energy (unpublished).
  11. Struckmeyer, H.I., Blevin, J.E., Sayers, J., Totterdell, J.M., Baxter, K., Cathro, D.L., Purcell, P.G. and Purcell, R.R., 1998, Structural evolution of the Browse Basin. North West Shelf. new concepts from deep seismic data: Proceedings of Petroleum Exploration Society of Australia Symposium, Perth, 1998.
  12. Symonds, P.A., Collins, C.D.N., Bradshaw, J., Purcell, P.G. and Purcell, R.R., 1994, Deep structure of the Browse Basin: implications for basin development and petroleum exploration: Proceedings of Petroleum Exploration Society of Australia Symposium, Perth, 1994.
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  • Article Type: Research Article
Keyword(s): AVO inversion; M. australis sand; prospect generation; PSDM processing; Vampire 2D

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