Upstream in USA
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United States

In 2016, our presence in the United States was focused on our Upstream, Chemicals, Trading and Gas & Power businesses.

Net surface area
of mineral rights



Net production


barrels of oil
equivalent per day

Net proved reserves


million barrels of oil
equivalent per day


As of December 31st, 2016, we owned mineral rights in the United States over a total net surface area of 4,436 km2 (2,934 km2 in exploration and 1,503 km2 in production/development). This includes Repsol's asset portfolio of unconventional resources in Midcontinent, Marcellus, and Eagle Ford, as well as the Shenzi production asset and a large number of exploration blocks in the Gulf of Mexico and the Alaska North Slope.

Net production at year-end was 12 Mbbl of liquids and 180.3 bscf of natural gas, with a total equivalent net production of 44.1 Mboe (120,373 boe/d), from Marcellus, Eagle Ford, Shenzi and Midcontinent. Net proved reserves of liquids and natural gas were estimated to total 369.9 Mboe as of December 31st, 2016.

Repsol’s presence in the United States focuses on Marcellus unconventional shale gas assets (dry gas), Eagle Ford (gas with associated liquids), and Mississippian Lime (gas with associated liquids). The project portfolio is rounded off with the major Shenzi crude oil offshore asset and the exploration portfolio boasting important discoveries (Alaska North Slope, Buckskin, and León).

2016 milestones

  • In March, partner Armstrong Oil & Gas became the operator of the Alaska North Slope in the USA. During 2016, progress was made in the environmental permit application phase of the future Nanushuk development project. In October 2015, Repsol reached an agreement with its partner Armstrong Oil & Gas to reorganize its interests in the shared North Slope project in Alaska. As part of the restructuring agreement, Armstrong acquired a 15% stake (added to its existing 30%) in the development area (Colville River Delta). Repsol holds a 55% stake in this area. Armstrong also acquired a 45% stake (in addition to its existing 30%) and the controlling interest in the exploration area in which both companies are partners. Repsol holds a 25% stake in this exploration area.
  • In April, operatorship of the western zone of the Eagle Ford production asset in the USA was transferred to Statoil, making it the operator of the entire asset. This transfer was part of the agreement with Statoil announced in December 2015 whereby Repsol swapped 13% of its interest in Eagle Ford in exchange for a 15% stake in the Gudrun production field in Norway. Repsol now has a 35.32% stake in the project. Eagle Ford Shale is located in Southeast Texas. Back in 2013, Statoil gained operatorship of the eastern zone. The asset consists of seven areas: Cooke, SM, STS, Celero, McMullen in the west and Choke Canyon and KDB in the east.
  • Well WI-7 in the Shenzi field was completed in the second quarter of 2016. This major production asset is located in the deepwater Gulf of Mexico where Repsol has a 28% stake. This is an injection well to increase production levels in the Southern Area of the oil field.
    In the second quarter, Repsol submitted the necessary documentation to the U.S. Government in order to withdraw from all exploration blocks in which Repsol was invested in the Chuckchi Sea in Alaska.

  • With regard to the important exploration discoveries made in recent years in the Gulf of Mexico, progress was made in 2016 defining the future development plan for Buckskin in order to make the Final Investment Decision (FID) in 2017. At the end of 2016, an agreement was reached for the company Llog to enter the Buckskin project with a 55% (Repsol has 22.5% in the project). The León-2 appraisal well was completed in 2016 and the results are been evaluated to confirm the extent of this important discovery that was made in 2014 with the León drilling.
  • There was less development activity in 2016 at the Midcontinent/Mississippian Lime unconventional resource assets, located in the states of Kansas and Oklahoma, where Repsol has held an interest since the agreement ratified in 2012 with the U.S. oil company SandRidge Energy. During the year, around 25 wells were drilled, which represents an 89% reduction when compared to 2015.
  • In March 2015, Repsol and partner Armstrong Energy made in Alaska the largest U.S. onshore conventional hydrocarbons discovery in 30 years. The contingent resources identified amount to approximately 1.2 billion barrels of recoverable light oil.



Trading in the U.S. consists of crude oil, gasoline, diesel, and jet fuel. Our commercial office is located in Houston.




We market our products through our U.S. commercial office.



Gas & Power

We direct the Canaport™ LNG regasification plant in Canada with a stake of 75% (our partner Irving Oil has the other 25%).

The plant has a maximum send-out capacity of 1.2 billion cubic feet (Bcf) per day and primarily serves customers in the Northeastern United States.




Get the latest information on Repsol's presence in United States

Information on net production, net proved reserves, and mineral rights as of December 31st, 2016