Blocks 28/2a & 28/3a
Orcadian Energy (CNS) Ltd, 100% and Licence Administrator
|Block||28/2a & 28/3a|
|Licence status||Phase A, initial term|
|Contingent resources||53 mmbbls (2C)|
|Unrisked prospective resources||119 mmbbls (2U)|
|Oil gravity ˚API||12˚-15˚|
|Reservoir oil viscosity||c. 300 cP|
Orcadian was awarded the P2482 licence in 2019 in the 31st licensing round. The licence is currently in phase A of the initial term and contains the Elke and Narwhal Fields. The Narwhal field was discovered by well 28/2-1, which was drilled by Arco in 1993, and Elke was discovered by well 28/3-1B, drilled by Murphy in 2000.
The Narwhal discovery well encountered viscous oil in an Eocene Tay sandstone and a sample of 14° API oil was recovered. This interval was also logged and cored. The Narwhal field has an estimated oil in place of around 26 mmbbls and a technical contingent resource of 9 mmbbls.
The Elke field is also a Tay sandstone reservoir but of a slightly different age to that encountered in the Narwhal well. The API gravity of the oil samples ranges from 12° to 15° and the reservoir oil viscosity is most likely to lie towards the lower end of a range from 300 to 800 cP. The Elke field has an oil in place of 130 mmbbls with significant appraisal upside, the technical contingent resource amounts to 45.5 mmbbls. Successful appraisal of an updip 3C area would increase this technical resource by 22 mmbbls.
There are a number of low risk Tay sand prospects within the licence area with an estimated prospective recoverable resource of about 61 mmbbls with geological chances of success which range from 64% to 87%; as well as a Jurassic and a Palaeocene prospect which together have another 59 mmbbls of prospective recoverable resource, though these are riskier prospects with 18-19% geological chance of success.