Strike Energy Ltd., Perth, confirmed a northern extension of West Erregulla gas field onshore North Perth basin permit EP469 with a strong result in the re-entered West Erregulla-3 (WE3) appraisal well.
The well had been suspended in January 2021 after drilling encountered a significant over-pressured zone in the lower Carynginia formation. Strike adapted the well design and added managed pressure drilling equipment to extend the well to its planned total depth.
The re-entered well encountered a gross gas column of 60 m (4,731 m-4,791 m) in the main Kingia Sandstone reservoir. Of this zone 38 m is regarded as net pay with an average porosity of 13.8% and a high of 19%.
The sands are consistent with other Kingia penetrations of the field and petrophysical analysis indicates no gas-water contact observed in the logs while drilling.
WE3 reservoir characteristics are the best seen in the field to date, the company said. So far, the well is the shallowest penetration of the four wells drilled in the field in the current program, Strike said. The Kingia Sandstone reservoir was encountered 30 m shallower than the discovery well at West Erregulla-2.
Inclusion of WE3 results in the field dataset will enhance resource modelling of the field and calls for a review of the resource classifications and the overall mapping of the Kingia reservoir.
WE3 was drilled to a total depth of 4,890 m. The secondary objective in the High Cliff Sandstones had insufficient reservoir development to warrant further testing. The well will be completed across the Kingia sands in preparation for production testing in August.
Strike is operator and 50% interest holder in EP469. Warrego Energy Ltd. holds the remaining 50%.