Gas, condensate confirmed at Quadrant’s Roc-2 well (Australia)

Gas, condensate confirmed at Quadrant's Roc-2 well (Australia)

Quadrant Energy’s Roc-2 well off Australia has reportedly confirmed a high quality reservoir within the Caley section of the Roc-2 well, almost fully saturated with gas condensate.

Roc-2 appraisal well, located within the WA-437-P in the North West Shelf of Western Australia, is being drilled to appraise the Roc gas-condensate discovery in the Caley section that Carnarvon, a partner in the project, announced on January 4, 2016.

The aim is to progress towards proving a volume above the minimum economic field size and to establish potential flow rates for future development planning.

“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,” Carnarvon said on Friday.

Carnarvon added that 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.”

The rig is in the process of completing the wireline coring operations before running the 7” (178 mm) liner, expected to take around six days, in preparation for flow testing the well.

The company said that 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 35 meter sand interval and the well opened for a controlled flow test over a period of about a week.

“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 bbls 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 permeabilities calculated to be 100 to 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,” Carnarvon said in its Friday’s announcement.

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