Wireline logging tools are currently being run with the addition of a repeat formation testing tool to help evaluate possible hydrocarbon-bearing zones.

Santos USA, which is the operator of the well, said it would take at least two more days to finish the logging suite.

The well is testing a deep Frio sands gas target with an unrisked estimated reserve potential of 225 billion cubic feet. Santos operates the well, which is targeted to reach a total depth of 18,200 feet. Perth-based junior Antares has a 5% working interest in the well. The remainder of each block is held by the Lamay Group, a consortium of US private interests.