Cooper Basin

About this study area

The Cooper Basin is part of a series of stacked basins in central-eastern Australia separated by orogenic unconformities. The Cambrian-Ordovician Warburton Basin is separated from the overlying Carboniferous-Middle Triassic Cooper Basin by the Alice Springs Orogeny, while the Cooper Basin is separated from the overlying Eromanga Basin by the Bowen-Hunter Orogeny. The Cooper Basin is has been the focus of 50 years of petroleum exploration and production. The region is part of the ‘Central Australian Heat Flow Province’, with temperatures reaching as much as 270 degrees celcius at depths of less than five kilometres.

Regional Structural Permeability Maps

These maps present three potential permeability maps based on shallow, intermediate, or steeply dipping faults.

Shallow Dipping Faults

This permeability map uses the FAST geomechanical risking method to determine the permeability likelihood of faults assumed to have shallow dip angles.

Moderately Dipping Faults

This permeability map uses the FAST geomechanical risking method to determine the permeability likelihood of faults assumed to have moderate dip angles.

Steeply Dipping Faults

This permeability map uses the FAST geomechanical risking method to determine the permeability likelihood of faults assumed to have steep dip angles.

Further Data

In addition to FAST fault maps, we also present maps of FAST geomechanical risking of fractures identified in 3D seismic surveys, and wellbore image logs.

Seismic Survey Fracture Maps

Fractures and sub-seismic scale faults were identified using a variety of seismic processing methods at the bottom Cooper/top Warburton Basin Horizon in the Moomba/Big Lake 3D seismic survey. These structures were then geomechanically risked to test their reactivation likelihood using FAST.

Wellbore Image Log Data

Resistivity image logs produce a pseudo-image of the wellbore wall, allowing for the identification of fractures, both resistive (closed), and conductive (open). These can then be plotted on a FAST reactivation likelihood plot.