Strike Energy Ltd., Perth, has identified four new leads with Permian-age reservoir potential in two 100%-owned onshore North Perth basin permits (EP 504, EP 503) and will acquire additional 2D seismic data before planning two exploration wells.
The leads lie within the Arrino and Kadathinni structures about 15 km east of the company’s South Erregulla gas field discovery and are contained within up-thrown fault blocks on the Tathra Fault Terrace inboard of the Urella Fault and at similar depths to Erregulla fields. They lie on trend with Lockyer Deep and encompass up to 100 sq km of combine closure, Strike said.
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 and extending south from Lockyer.
The terrace forms a west-facing step down from the elevated Irwin Terrace into the deepest part of the North Perth basin called the Dandaragan Trough.
Similar east-facing structural trends in the region host discovered fields Beharra Springs and Waitsia, while Permian gas has also been proven in the axial high at West and South Erregulla.
Three linked closures, Arrino North, Arrino Central, and Arrino South, rise towards the north.
A deeper Kadathini lead comprises a separate additional fault block to the south.
Estimated depth of the four structures is 4,000 m for Arrino, which is similar to Lockyer Deep, to about 6,000 m for Kadathinni, which is deeper than West Erregulla.
The leads have been defined on limited 2D data, but the seismic lines show identical seismo-stratigraphy and structural style to the recent Permian discoveries at Lockyer Deep and South Erregulla, Strike said. An amplitude bloom at the Kingia Sandstone level has been observed on some lines.
