Viaro Energy has announced the acquisition of Spark Exploration, providing Viaro with 50% of Spark Exploration’s P2593 licence, West of Shetland, partnered with Ithaca Energy.

Overview of Spark Exploration West of Shetland opeartions

Spark's primary asset in the West of Shetland is Licence P2593, in which the Company holds 50% equity in a joint venture partnership with Siccar Point Energy (50%), who operate the licence on behalf of the joint venture. 

Tuck Gas Project
The Tuck Gas Project is an appraisal opportunity of a gas accumulation proven by Well 206/11-1 (1977, Elf), within Upper Cretaceous sandstones on the flank of the Rona Ridge. The region is a prolific hydrocarbon province with significant oil and gas production. Gas production of greater than 40 MMscf/d from similar-aged reservoirs is ongoing at Total’s Edradour Field approximately 50 km to the north-east. Total is also in advanced planning to develop the nearby Glendronach gas accumulation. The gas is evacuated via Total’s Laggan-Tormore pipeline.

A significant 3D seismic amplitude anomaly is associated with the reservoir interval at the Tuck Gas Project to the south-west of the 206/11-1 discovery well. That well flowed gas to surface. Well 205/15-1 (2018, CNOOC) drilled through the same reservoir interval (while targeting a deeper Jurassic reservoir) and encountered a 45m thick sand approximately 3 km to the north-east of the Tuck Gas Project anomaly. Good gas shows were encountered at the top of these sandstones despite being penetrated more than 500 m down-dip from of the crest of the trap.

A 3D seismic inversion study was completed over the Tuck Gas Project in Q4 2021 and concluded that the observed 53 km2 seismic anomaly is consistent with thick, porous sandstones with a high probability of gas fill. The downdip extent of the high probability gas sands identified by the inversion study is structurally conformant which further increases confidence in the presence of gas in the trap.

Boulmer Project
The Boulmer Prospect is a combination structural-truncation trap containing Devonian reservoir sandstones located in the centre of licence P.2593. The prospect is 5 km to the south-west of the Clair Field (operated by BP). Clair is one of the largest oil fields on the UK Continental Shelf with a footprint of 220 km2 and an oil column of over 700m. The field contains in excess of seven billion barrels of oil within the same Devonian reservoir and to date approximately one billion barrels of reserves have been developed in two phases. BP is currently preparing to make a Final Investment Decision on a further phase of development of the field.

The Boulmer Prospect has been mapped on high quality 3D seismic data as a robust three-way structural closure. The Devonian reservoir sequence onlaps the Lewisian basement topography and is truncated to the south-west by the near Base Cretaceous Unconformity. The absence of the Devonian package to the south-west is confirmed by Well 205/20-1 which penetrated Jurassic sediments sitting directly on the Pre-Cambian basement. The basement, which forms the sideseal for the trap, is extremely tight with no open fractures in core cut in 205/20-1. Jurassic and Cretaceous shales form the topseal for the prospect.

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