LONDON – Independent Oil and Gas (IOG) has upgraded gas resources from two discoveries in the UK southern North Sea. This follows a report by consultant Beagle Geoscience that involved detailed interpretation and remapping of 3D seismic reprocessing over the wider Blythe area.
As a result, P50 resources at Harvey have increased to 113 bcf from the previous 16 bcf, while at Elgood, P50 resources have doubled to 22 bcf.
Arco drilled the Harvey discovery well 48/23-2. Previously Harvey and the Truman prospect were considered separate structures. The new data, IOG says, has improved understanding of the complex faulting in the overlying strata, leading to the conclusion that there is in fact a single, larger Harvey structure.
The company is now considering committing to a firm appraisal well on Harvey which would need to be drilled before a reservoir model could be built and a development plan prepared.
A successful outcome could lead to a tieback via the same export route IOG is lining up for its Blythe and Vulcan Satellite hubs.
Enterprise Oil discovered Elgood in 1991 via well 48/22-4 which tested gas to surface at rates up to 17.6 MMcf/d. IOG anticipates a single-well development tied back to the planned unmanned platform and producing well at Blythe.
Further pre-development work is under way on Elgood prior to submission of a field development plan.
Recently the UK Oil & Gas Authority granted an extension to end-March 2017 for license P2085, which includes Harvey. This should give IOG sufficient time to determine whether to commit to a firm well.
In the UK northern North Sea, the company has secured a two-year extension for license P1609 to Feb. 11, 2019. This encompasses block 9/21a containing the heavy-oil Skipper discovery east of the Shetlands.
Again, the extension will allow field development options to be reviewed once a reservoir model has been developed.