Structural Controls on Seismic-Scale Carbonate Cementation in Hydrocarbon-Bearing Jurassic Fluvial and Marine Sandstones from Australia: A Comparison

  1. Sadoon Morad
  1. J. Schulz-Rojahn1,†,
  2. S. Ryan-Grigor1,‡ and
  3. A. Anderson2

Published Online: 17 APR 2009

DOI: 10.1002/9781444304893.ch15

Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution

Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution

How to Cite

Schulz-Rojahn, J., Ryan-Grigor, S. and Anderson, A. (1998) Structural Controls on Seismic-Scale Carbonate Cementation in Hydrocarbon-Bearing Jurassic Fluvial and Marine Sandstones from Australia: A Comparison, in Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution (ed S. Morad), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304893.ch15

Author Information

  1. 1

    Australian Petroleum Cooperative Research Centre (APCRC), National Centre for Petroleum Geology and Geophysics (NCPGG), Thebarton Campus, University of Adelaide, SA 5005, Australia

  2. 2

    BHP Petroleum (Americas) Inc., 1360 Post Oak Boulevard, Suite 500, Houston, TX 77056, USA

  1. Shell Development (Australia) Pty Ltd, Shell House, 1 Spring Street, Melbourne, Victoria 3001, Australia

  2. Schlumberger Cambridge Research, High Cross, Madingley Road, Cambridge CB3 0EL, UK

Publication History

  1. Published Online: 17 APR 2009
  2. Published Print: 29 MAY 1998

ISBN Information

Print ISBN: 9780632047772

Online ISBN: 9781444304893

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Keywords:

  • structural controls on seismic scale carbonate cementation in Jurassic fluvial and marine sandstones, Australia;
  • migration-related carbonate cement bodies;
  • tectonic setting and regional geology;
  • burial subsidence and temperature histories;
  • Cooper-Eromange basins

Summary

Wireline log responses, 2D and 3D seismic data, petrographic and isotope results were used to compare major carbonate-cemented zones in Jurassic marine (Angel Field, Carnarvon basin) and fluvial sandstones (Gidgealpa Field, Eromanga basin), Australia. In both fields the carbonate-cemented zones concentrate near the crest of major structures, above areas where regional seals in older formations are breached. In the Angel Field, poikilotopic dolomite-cemented zones with a cumulative thickness of up to 165 m occur in the Upper Jurassic Angel Formation of submarine fan origin, both above and below the present-day gas-water contact. In this field the dolomite cement volume is of the order of 0.6 km3 to 1.4 km3, distributed over an area of 300 km2. At Gidgealpa, poikilotopic calcite-cemented zones with a cumulative thickness of up to 65 m concentrate in the lower portion of the fluvial Namur Sandstone, about 100 m below the present-day oil–water contact. In this field, the calcite-cemented zones extend over an area 7.5 km wide and 20 km long, with the total volume of calcite cement being 0.22–0.37 km3. Both geological areas are characterized by: (i) rapid initial burial; (ii) continuous subsidence; (iii) late-stage Tertiary compression, which triggered structural growth and closure development; (iv) coincidence of timing of peak hydrocarbon generation and migration with the Tertiary compression; and (v) the availability of an effective vertical plumbing system (locally breached regional seals in sequences underlying the carbonate-cemented reservoirs). These observations point towards a migration-related control on carbonate cementation broadly synchronous with hydrocarbon charging into structures. In the Eromanga basin, a statistical correlation exists between major calcite cement occurrence and oil pools in Jurassic reservoirs. The data suggest that seismic (predrill) identification of high-amplitude events related to major carbonate cementation can be useful for highgrading prospects and leads for drilling in clastic petroleum provinces that are characterized by a relatively late-stage compressive tectonic regime.