Quadrant Energy has confirmed a successful well test from the Roc-2 well, offshore Western Australia, that shows significant potential in a largely unexplored area.
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Map of Roc-2, from Quadrant. |
Roc-2 is 165km north of Port Hedland in the Bedout basin, within the WA-437-P exploration permit in the North West Shelf.
The well flow tested at a maximum rate of 51.2 MMscf/d of gas and 2943 b/d of condensate from a 25m thick perforated interval at 4400m below sea level.
Quadrant CEO Brett Darley said the test result highlights the prospectivity of the Bedout basin. He said since farming into the area in 2012, the Quadrant Energy-led joint venture has achieved a 100% success rate in three exploration wells – Phoenix South-1, Roc-1 and now Roc-2.
“These results show significant potential in this largely unexplored area situated in relatively shallow water," Darley said. “The Roc-2 result provides Quadrant Energy the opportunity to evaluate a range of development options given the close proximity to major resource projects. Quadrant Energy is continuing to obtain high quality data to thoroughly evaluate these options in a measured approach.”
The Roc-1 well is located in WA-437-P, approximately 20km southeast of the 2014 Phoenix South-1 oil discovery, and around 150km north of Port Hedland. In January 2016, gas and condensate were discovered while drilling Roc-1. The well encountered a gross reservoir section of around 120m in the Caley member, with the top 40m being hydrocarbon bearing. Subsequently, Roc-2 was designed to appraise the Roc-1 Caley reservoir section in an up-dip location, around 5km to the east of the Roc-1 well.
According to partner Carnarvon, Roc-2 temporarily completed and tested using a drill stem test in order to determine the flow potential from the Caley formation in the well. The uppermost 35m of sand in the Caley formation were sealed off from the rest of the reservoir and completed with casing, before being perforated to allow the formation fluids to flow into the wellbore.
Under natural formation pressure, the hydrocarbons flowed to surface through a restricted series of tubing and chokes where formation pressures and fluids were measured. The maximum flow rate achieved was 51.2 MMscf/d of gas with associated condensate rate of 2943 bbl/d, flowing through a 96/64in choke.
Carnarvon said if a development well was drilled into the Roc-2 formation, that well should be capable of producing in excess of 100 MMscf/d plus the associated condensate. To put that into perspective, it would be around 10% of the entire domestic gas demand in Western Australia, achievable with one well.
“The flow rates were higher than expected,” said Carnarvon managing director Adrian Cook, adding that the results provide the joint venture a platform within the Phoenix South and Roc area in which to test and develop this potential.
Quadrant Energy is the operator and holds between 70-80% interest over four permits totaling more than 21,000sq km. At Roc-2 Quadrant holds 80%, with Carnarvon Petroleum holding the remaining 20%.
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