Ronald R. Charpentier Timothy R. Klett Marilyn E. Tennyson Tracey J. Mercier Michael E. Brownfield Janet K. Pitman Stephanie B. Gaswirth Heidi M. Leathers-Miller Christopher J. Schenk 2015 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 459 million barrels of shale oil, 275 billion cubic feet of associated gas, and 23 million barrels of natural gas liquids in the Central Sumatra Basin, Indonesia.</p> application/pdf 10.3133/fs20153072 en U.S. Geological Survey Assessment of shale-oil resources of the Central Sumatra Basin, Indonesia, 2015 reports