Marilyn E. Tennyson Timothy R. Klett Thomas M. Finn Tracey J. Mercier Stephanie B. Gaswirth Kristen R. Marra Phuong A. Le Sarah J. Hawkins Heidi M. Leathers-Miller Stanley T. Paxton Christopher J. Schenk 2016 <p>Using a geology-based assessment methodology, the U.S. Geological Survey assessed mean undiscovered, technically recoverable resources of 121 million barrels of oil and 212 billion cubic feet of gas in the Lusitanian Basin Province, Portugal.</p> application/pdf 10.3133/fs20163086 en U.S. Geological Survey Assessment of undiscovered oil and gas resources of the Lusitanian Basin Province, Portugal, 2016 reports