Santos spuds Roc South-1 well

Australian energy company Santos has started drilling the Roc South-1 well offshore Western Australia, using the Noble Tom Prosser jack-up drilling rig. 

The Noble Tom Prosser rig has recently been used to drill the Dorado-2 well. Both Dorado and Roc South reside in WA-437-P where Santos is the operator and Carnarvon Petroleum is its partner.

Since completing operations at the Dorado-2 well, the Noble Tom Prosser jack-up drilling rig has arrived at the Roc South-1 location, approximately 15 km northeast of the Dorado-1 location, and has drilled the surface hole down to around 195 meters Measured Depth (MD) in preparation for installation of surface casing, Carnarvon informed on Tuesday.

After installing the surface casing, the rig will drill the 17 1/2” hole to the planned section depth of approximately 1,200 meters Measured Depth (MD) followed by setting the 13-3/8” casing.

Roc South-1 is an exploration well with primary objectives in the Caley, Baxter, Crespin and Milne Members of the Lower Keraudren Formation.

This well will test the Caley play in a sub-crop trapping geometry that is analogous to the Dorado field, which was discovered in August 2018 and successfully appraised in June 2019. The Baxter, Crespin and Milne objectives are also set up by a sub-crop trapping geometry.

Dorado-1 discovered hydrocarbon bearing reservoirs in the Caley, Baxter, Crespin and Milne Members of the Lower Keraudren Formation.

The Roc South-1 well is located approximately 15km northeast of Dorado-1 and 160km north-northeast of Port Hedland in the Bedout Sub-basin. Drilling is in approximately 95 meters water depth.

Following the Roc South-1 well, the rig is scheduled to drill the Dorado-3 appraisal well.

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