• Significant conventional gas discovery in the Wagina Sandstone
• Wagina reservoir characteristics appear good quality with a gross section of 74m
• WE-2 still to drill through to Basal Wagina and yet to encounter water wet sands
• Wagina porosity development is additional evidence of Strike subsurface model accurately predicting hydrocarbons and porosity

Strike Energy Limited confirms that the Strike-Warrego Joint Venture has made a significant gas discovery in the Wagina sandstone as part of the West Erregulla-2 drilling campaign.

The Wagina sandstone was found to be ~74 meters plus in thickness and made up of sections of clean sand with interpreted blocky porosity development that was observed on drilling to have hydrocarbons present throughout. This section was observed and interpreted from 4,106 to 4,180m.

The well section was finished without observing the end of the Wagina and there is potential for further Wagina sands to be encountered in the next section. The wireline logs have been loaded into Strike’s geological model and formation tops have been correlated to nearby offset wells. This correlation suggests that the Basal Wagina sandstone which is the formal secondary target of the well, is yet to be encountered.

The sudden influx of over-pressured gas into the well whilst drilling through the Wagina exceeded expectations and required mud weight changes to re-establish appropriate well conditions. This increased mud weight in conjunction with the active formation resulted in bore-hole breakout along the well bore. This has meant that the logging tools were unable to form a close contact with the sides of the well bore and attempts to gather reservoir pressures and samples were not successful.

The hole condition in the lower parts of the Wagina did not enable reliable logging to be achieved, however where credible logging results were captured at the top of the Wagina, this confirmed 14.2% porosity over a 2.5m section. This upper section coincides with the significant drilling break, clean porous sands and gas flows observed over the 6m section (4,111-4,117m), as reported on the 24th of July.

Strike’s Managing Director, Stuart Nicholls said,
“This is a significant discovery and comes from a secondary target which carried a low pre-drill probability of success. Importantly, it provides further confidence in Strike’s predictions of good porosity development within Permian reservoirs being possible at depths greater than that of Waitsia and to the South-East.”

“With good porosity trends continuing with depth, Strike believes that it is on track to find a good quality reservoir within its primary target in the Kingia-High Cliff.”

“With the primary target remaining to be drilled and potentially even more Wagina to come, this is a very exciting time for the company.”

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