Australian junior Strike Energy has used seismic data to further firm up the prospectivity of its acreage in Western Australia’s onshore Perth basin.

The company revealed Tuesday that 3D seismic over its Walyering prospects in EP447 indicated the presence of a high confidence wet-gas accumulation updip of the Walyering-4 well.

This has led it to upgrade the conventional wet gas prospective resource of the Walyering A and B sands to a best estimate of 86 billion cubic feet of gas and 2.18 million barrels of condensate.

The new 3D data shows the Walyering structure is made up of several fault blocks, linked to form a grossly antiformal structure with a four-way dip closure.

South Erregulla

Strike also confirmed Tuesday it had completed the reprocessing of an initial subset of 23 historical 2D seismic lines that cover the Great Erregulla region.

It noted this had greatly improved the imaging of the South Erregulla prospect, adding some lines, amplitude blooms and seismic pushdown events were observed that were similar to those seen in its recent West Erregulla discovery.

It said the new data confirmed the presence of a gross four-way dip closure over the South Erregulla structure, which it estimates to contain 1.6 trillion cubic feet of prospective gas resources.

Strike stated the connectivity of South Erregulla to West Erregulla was also well imaged, providing it with “a high confidence” in finding an equivalent trap-seal combination that is likely to hold a conventional quality, hydrocarbon charged reservoir.

“The Greater Erregulla region, where Strike has a dominant acreage position, has the potential to deliver a very large volume of gas into the state’s gas market at a critical time,” Strike chief executive Stuart Nicholls said.

“However, we are not simply relying on the Greater Erregulla region to deliver our strategy - we are working hard on our broader Perth basin assets, such as the Jurassic wet gas play at Walyering, to create near-term upside opportunities with fast-to-market development options.”

Greater Erregulla

Strike confirmed it would consider both South Erregulla and Walyering as potential drilling candidates after the completion of its upcoming West Erregulla campaign.

Strike is planning to make a final investment decision on the first phase of the West Erregulla development by the end of the year.

The first phase development will consist of a 50 terajoule per day facility to be built by Australian Gas Infrastructure Group (AGIG), connected to the field via a raw gas trunkline.

The Phase 1 infrastructure will also be designed with low-cost expansion opportunities and the eventual Phase 2 development of West Erregulla in mind, with the sales pipeline from the plant being designed to handle at least 250 TJ per day.

Strike believes West Erregulla is just the start of a larger development, which could eventually become known as the Great Erregulla Gas Project, as it targets additional volumes and expansion opportunities.

Exploration

Strike firms up Perth basin prospectivity