Quadrant Energy confirmed a gas condensate discovery at the Roc-2 appraisal well offshore Western Australia, according to partner Carnarvon Petroleum.
Roc-2 is in WA-437-P exploration permit in the North West Shelf of Australia, where condensate rich gas samples were extracted from the well at several locations.
The well intersected 60m of gross gas and condensate charged sands in the Caley formation, with 30m of net reservoir intersected from wireline data.
The rig is in the process of completing the wireline coring operations before running the 7in (178mm) liner, expected to take around six days, in preparation for flow testing the well, Carnarvon said.
Following the installation of the liner, it will take an additional 10 days to prepare the surface equipment and install the necessary tubing and appropriate valves in the wellbore necessary for the well testing. The well will then be perforated across the uppermost 35m sand interval and the well opened for a controlled flow test over a period of about a week. Results are expected in about three weeks, Carnarvon said.
Following the successful wireline operations, Carnarvon can confirm the presence of a high quality reservoir within the Caley section of the Roc-2 well, which is almost fully saturated with gas condensate. Porosities of up to 15% were observed with an average around 9%, which is an excellent result for reservoir at this depth and meets our pre-drill expectations.
Condensate rich gas was sampled from a number of locations, and the rig estimate of liquid content within the gas is similar to that of Roc-1 at around 50-60 bbl of condensate per million standard cubic feet of gas. The rate at which the gas was extracted for sampling was significant, indicating high permeability sands with Roc-2 confirms gas and condensate 23 September 2016 permeabilities calculated to be 100-350 millidarcy (mD), similar to the results from the core analysis of Roc-1 which had sands of 300 to 500 mD.
The thickness of the sands, the high quality of the net sands, the high gas saturation and the depth of the contact mean the well warrants being flow tested.
Pressure data obtained from the wireline logs did not correlate with the Roc-1 data meaning that Roc-1 and Roc-2 are likely to be separate structures in all or some of the sands, but they are still located within the same greater structural closure.
The Roc-2 well is located within the WA-437-P where Quadrant in the operator with 80% stake. Partner Carnarvon Petroleum holds the remaining 20%.
Map from Carnarvon.
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