Strike Energy has announced the discovery of a “significant” extension of the Permian trend within its 100%-owned exploration portfolio in the Perth Basin.
The development was made in EP504 and EP503, which also hosts the South Erregulla gas field. Strike said of the latest intellectual capital it had identified.
Tathra Terrace
The Tathra Terrace structural trend comprises a series of linked fault blocks formed between the Urella fault to the East and the Tathra/Wicherina Fault to the West, extending from Lockyer in the North. It forms a west-facing step down from the elevated Irwin Terrace into the deepest part of the North Perth basin, the Dandaragan Trough.
Similar east facing structural trends, such as the Beharra and Redback Terraces, have proven to host prolific Permian gas fields. In addition, Permian gas has also been proven in the axial high at West Erregulla and South Erregulla.
Arrino & Kadathinni
At least four large structural closures are identified along the Tathra Terrace. Three linked closures rise towards the North and are termed Arrino North, Arrino Central and Arrino South leads respectively. The deeper Kadathini lead comprises an additional fault block somewhat isolated from Arrino and deeper to the South. South of Kadathini, the Tathra trend shows structural reversal along a deep flexure marking the Abrolhos Transfer Zone. The combined closure of these four structures is ~100km².
Strike said these leads were defined on a limited 2D dataset; however the seismic lines show identical seismo-stratigraphy and structural style to seismic across recent Permian gas discoveries at Lockyer Deep and South Erregulla.
In addition, a prominent amplitude bloom at near Kingia level is observed on several lines. Sweetness cubes indicate these amplitude blooms are also associated with a decrease in frequency. Similar amplitude /frequency blooms were observed at West Erregulla and Lockyer Deep prior to drilling and Strike interprets these to be indicative of gas-charged conventional reservoir.
