The Quadrant Energy Ltd.-operated Roc-2 appraisal well in the Bedout subbasin offshore Western Australia 160 km north of Port Hedland has produced better-than-expected results during a sustained flow test program.
The well flowed at rates of as much as 51.2 MMcfd of gas along with 2,943 b/d of condensate through a 1½-in. choke. The well flowed at the maximum rate possible with the equipment used.
Quadrant reported insignificant levels of carbon dioxide, hydrogen sulphide, sand, and water in the flow stream.
The drillstem test was undertaken over 5 days. Drawdown for the high flow rate was about 500 psi, which indicates good productivity. Interpreted permeability of the reservoir is about 130 md across the perforated interval.
Roc-2 is in exploration permit WA-437-P and was drilled by Diamond Offshore Drilling’s Ocean Monarch semisubmersible drilling rig.
The test exceeded the company’s expectations, raising hopes that the well can be turned into a commercial producer. The report added that using standard equipment for North West Shelf developments, Roc-2 would be capable of producing more than 100 MMcfd of gas—equivalent to about 10% of Western Australia’s entire domestic demand—from a single well.
The well has provided significant new information about the quality of the Caley formation reservoir and provide comfort for development using a production platform within the Roc and nearby Phoenix South discovery area.
Quadrant has an 80% interest with fellow Perth-based Carnarvon Petroleum Ltd. holding the balance.