Strike Energy finds Perth basin gas in Walyering-5

Strike Energy Ltd., operator of onshore North Perth basin permit EP447, confirmed a high-quality conventional gas accumulation at Walyering gas field with the Walyering-5 appraisal well.

The results exceed pre-drill expectations with the encounter of a higher quality reservoir and the presence of two additional net gas pay zones in deeper sands within the field, the operator said.

Mud logs, logging-while-drilling, and wireline logging tools were used to evaluate four quality coarse grained conventional gas-charged sands throughout the Jurassic-age Cattamarra Coal Measures.

The sands are interpreted to be regional A, B, and C sands seen in the historic Walyering wells as well as in nearby Jurassic gas discoveries Gin Gin, Red Gully, and Ocean Hill, the company said.

Pressure date was measured at about 4,386 psi with permeabilities of 274 millidarcies. Porosity averaged 15.4%. Gas samples indicate a low carbon dioxide content of less than 0.69%.

Walyering-5 will now be production tested.

Four historical Walyering wells have been drilled in the field first discovered by Walyering-1 in 1971.

This well encountered a 30 m-thick sand with good quality conventional reservoir development (A-sand) and a second, deeper, thinner gas-charged sand (B-sand). A-sand flowed 13.5 MMcfd of gas on test.

Subsequently, three further Walyering wells were drilled on the 2D seismic data in the surrounding area.

Walyering-2 and -3 encountered non-commercial hydrocarbon saturated reservoir at about the same level as the Walyering-1 A-sand, but flowed only small amounts of gas on test.

Walyering-4 was drilled in 2001 just updip of Walyering-1 and encountered commercial-grade conventional reservoir similar to Walyering-1, but was water saturated.

Strike holds a 55% interest in the permit. Talon Energy Ltd. holds 45%.

Exploration efforts will now move to other targets within the permit.