THE PROJECT

The Department of Mines, Industry Regulation and Safety (DMIRS) is investigating the feasibility of storing carbon dioxide within the Lesueur Sandstone at its Southwest Geosequestration Hub.

In 2014-2015, two stratigraphic holes (Harvey 2 and 3) were drilled to up to 1,750 m depth using diamond coring methods, and a third bore (Harvey 4) was drilled to 1,800 m depth by mud rotary.  This provided important information of the ability of the Eneabba and Yalgorup formations to isolate carbon dioxide injected into the underlying Lesueur Formation.

Rockwater was sub-contracted by the lead drilling contractor (DDH1) to provide geological interpretation, sample collection and project management during drilling of the three holes.  This included daily and weekly progress updates to DMIRS.

In 2020, Rockwater provided CSIRO (current operator the geosequestration laboratory) with advice and supervision of bore workover and injection testing.  The workover used fiber optic sensing equipment installed down the hole, and a pressure transducer at the reservoir level, to monitor well efficiency improvement during the workover.

• Geological and geophysical interpretation
• Field investigation reporting
• Bore remediation risk assessment

• Down-hole geophysics surveys
• Core logging
• Mud-rotary bores
• Pumping tests
• Injection tests
• Bore remediation
• Clogging assessments
• Fiber optic distributed sensing