Jurassic-Cretaceous Sandstone Diagenesis and Porosity in the Eromanga Basin

A geological study of Jurassic and Lower Cretaceous sandstones from the Eromanga Basin in New South Wales. The dataset, published by Geoscience Australia, details diagenetic processes and quantifies porosity and permeability for quartzose and volcanolithic petrofacies. It describes authigenic mineral sequences and correlates porosity-permeability patterns with depositional environments.

Use Cases

• Modeling reservoir quality based on porosity and permeability measurements for quartzose and volcanolithic sandstones.
• Analyzing diagenetic sequences based on described authigenic mineral appearances (e.g., glauconite, zeolite, quartz overgrowths).
• Correlating petrophysical properties with depositional environments mentioned, such as fluvial, lacustrine, and shallow-marine.
• Investigating pore-type distribution (micropores vs. macropores) and its relationship to rock composition and fluid interaction.

Strengths

• Includes specific quantitative measurements: volcanolithic sandstones average 35% porosity and 125 md permeability.
• Provides detailed petrofacies descriptions, distinguishing quartzose from volcanolithic sandstones and their respective formations.
• Documents a clear temporal sequence of authigenic mineral formation for both chemically reactive and stable sandstone types.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale statistical modeling.

Provenance

Source

Geoscience Australia Data

Time Range

Jurassic and Lower Cretaceous periods

Freshness

Last updated 2026-03-25 19:20:26.054353; freshness should be verified.

Geography

Eromanga Basin, New South Wales, Australia