Repsol Makes 'Largest US Onshore Discovery in 30 Years'
Repsol and partner Armstrong Energy stated that they have made the largest U.S. onshore conventional hydrocarbons discovery in 30 years.
The Horseshoe-1 and 1A wells drilled during the 2016-2017 winter campaign confirm the Nanushuk play as a significant emerging play in Alaska’s North Slope, Repsol said in a company statement.
Contingent resources identified with the existing data in Repsol and Armstrong Energy’s blocks in the Nanushuk play in Alaska could amount to approximately 1.2 billion barrels of recoverable light oil, Repsol revealed.
The Madrid-based energy company has been actively exploring Alaska since 2008, and since 2011 the company has drilled multiple consecutive discoveries on the North Slope along with partner Armstrong.
“The successive campaigns in the area have added significant new potential to what was previously viewed as a mature basin,” a Repsol representative said in a company statement.
“Additionally Alaska has significant infrastructure which allows new resources to be developed more efficiently,” the representative added.
Repsol holds a 25 percent working interest in the Horseshoe discovery and a 49 percent working interest in the Pikka Unit. Armstrong holds the remaining working interest and is currently the operator.
The Horseshoe discovery extends the Nanushuk play more than 20 miles south of the existing discoveries achieved by Repsol and Armstrong in the same interval within the Pikka Unit during 2014 and 2015, where permitting for development activities are underway.
Preliminary development concepts for Pikka anticipate first production there from 2021, with a potential rate approaching 120,000 barrels of oil per day.
The Horseshoe-1 discovery well was drilled to a total depth of 6,000 feet and encountered more than 150 feet of net oil pay in several reservoir zones in the Nanushuk section. The Horseshoe-1A sidetrack was drilled to a total depth of 8,215 feet and encountered more than 100 feet of net oil pay in the Nanushuk interval as well.
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