1887
24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery
  • ISSN: 2202-0586
  • E-ISSN:

Abstract

The early Cretaceous South Perth Shale has been previously identified as the regional seal in the offshore Vlaming Sub-basin. The South Perth Shale is a deltaic succession, which infilled a large palaeotopographic low in the Early Cretaceous through a series of transgressive and regressive events. A study undertaken at Geoscience Australia has shown that the seal quality varies greatly throughout the basin and in places has very poor sealing properties. A re-evaluation of the regional seal based on seismic mapping determined the extent of the pro-delta shale facies within the South Perth Shale succession, which provides effective sealing capacity.

New sequence stratigraphic interpretation, seismic facies mapping, new and revised biostratigraphic data and well log analysis were used to produce palaeogeographic reconstructions which document the distribution of depositional facies within the South Perth Shale and reveal the evolution of the early Cretaceous deltas.

Our study documents spatial variations in the seal quality and re-defines the extent and thickness of the regional seal in the offshore central Vlaming Sub-basin. It provides an explanation for the lack of exploration success at some structural closures and defines constraints on the possible location of valid plays.

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/content/journals/10.1071/ASEG2015ab016
2015-12-01
2026-01-13
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References

  1. Bhattacharya, J.P., 2006, Deltas: Special Publication - Society for Sedimentary Geology, v. 84, 237-292. Catuneanu, O., 2006, Principles of sequence stratigraphy, Access Online via Elsevier, 386p.
  2. Causebrook, R., Dance, T., Bale, K., 2006, Southern Perth Basin site investigation and geological model for storage of Carbon dioxide. CO2CRC Report Number; RP06-0162.
  3. Crostella, A. and Backhouse, J., 2000, Geology and petroleum exploration of the central and southern Perth Basin, Western Australia. Western Australia Geological Survey, Report 57, 75p.
  4. Gani, M.R. and Bhattacharya, J.P., 2005, Lithostratigraphy versus chronostratigraphy in facies correlations of Quaternary deltas; application of bedding correlation, SEPM Special Publication, 83, 31-48.
  5. Lech, M.E., Southby, C., Lescinsky, D., Wang, L., Jorgensen, D.C., Borissova, I., and Johnston, S. 2014, Using palaeogeographic reconstructions to understand lithological variability within the Early Cretaceous Gage Sandstone and South Perth Shale in the Vlaming Sub-Basin, offshore southern Perth Basin. APPEA Conference Proceedings, Perth WA, April 6-9. 2014.
  6. Macphail M., 2012, Palynostratigraphic analyses of samples encompassing the Valanginian unconformity in Challenger-1, Mullaloo-1, Parmelia-1, Peel-1, Quinns Rock-1 & Warnbro-1, Warnbro & Parmelia groups, Vlaming Sub-basin, Perth Basin, (unpublished).
  7. Mitchum, R.M., 1977, Seismic Stratigraphy and Global Changes of Sea Level: Part 11. Glossary of Terms used in Seismic Stratigraphy: Section 2. Application of Seismic Reflection Configuration to Stratigraphic Interpretation, Memoir 26, 205 - 212.
  8. Miyazaki, S., Cadman, S.J., Vuckovic, V., Davey, S.J. and Conolly, J.R., 1996, Vlaming Sub-basin Petroleum Prospectivity. Petroleum Prospectivity Bulletin 1996/1, Bureau of Resource Sciences: Canberra. Monteil, E., 2005, Biostratigraphic re-appraisal of nine wells from the northern Vlaming Sub-basin, Perth Basin, Australia. Geoscience Australia Professional Opinion 2005/05, (unpublished).
  9. Monteil, E., Boreham, C. and Krassay, A., 2006, Basic data results from new biostratigraphic and geochemical sampling and analysis of offshore wells from the Vlaming Sub-basin., Western Australia. Geoscience Australia Professional Opinion 2006/05 (Report for Approval to Sample No. S31784), (unpublished).
  10. Nicholson, C.J., Borissova, I., Krassay, A.A., Boreham, C.J., Monteil, E., Neumann, V., di Primio, R. and Bradshaw B.E., 2008, New exploration opportunities in the southern Vlaming Sub-basin, The APPEA Journal, 371-379.
  11. Neumann, V., di Primio, R. and Horsfield, B., 2007, Burial history modelling and petroleum fluid bulk compositional predictions on the Vlaming and Mentelle sub-basins, offshore southern Western Australia, GeoS4 Report 071001 GeoS4 Gmbh, Germany, non-exclusion study.
  12. Olariu, C. and Bhattacharya, J.P., 2006, Terminal distributary channels and delta front architecture of river-dominated delta systems: Journal of Sedimentary Research, 76(2), 212-233.
  13. Porebski, S.J. and Steel, R.J., 2006, Deltas and sea-level change: Journal of Sedimentary Research, 76(3-4), 390-403.
  14. Posamentier, H.W. and Morris, W.R., 2000, Aspects of the stratal architecture of forced regressive deposits: Geological Society, London, Special Publications, 172(1), 19-46.
  15. Spring, D.E. and Newell, N.A., 1993, Depositional systems and sequence stratigraphy of the Cretaceous Warnbro Group, Vlaming Sub-basin, Western Australia. The APPEA Journal 33 (2), 190-204.
  16. Vail, P.R., 1987, Seismic stratigraphy interpretation using sequence stratigraphy, Part 1: Seismic stratigraphy interpretation procedure. In: Bally, A.W. (Ed.), Atlas of seismicstratigraphy. American Association of Petroleum Geologists, Studies in Geology, 27, pt 1, 1-10.
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