income of KTIPI, which is recorded in loss on equity method investments, net in the consolidated statement of operations. Years Ended December 31, 2016 2015 Sales volumes: Jubilee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,760 8,538 TEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 996 — 6,756 8,538 Revenues: Oil sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $310,377 $446,696 Average sales price per Bbl . . . . . . . . . . . . . . . . . . . . . . . . . . 45.94 52.32 Costs: Oil production, excluding workovers . . . . . . . . . . . . . . . . . . $119,758 $ 92,994 Oil production, workovers . . . . . . . . . . . . . . . . . . . . . . . . . (391) 12,342 Total oil production costs . . . . . . . . . . . . . . . . . . . . . . . . $119,367 $105,336 Depletion and depreciation . . . . . . . . . . . . . . . . . . . . . . . . $140,404 $155,966 Average cost per Bbl: Oil production, excluding workovers . . . . . . . . . . . . . . . . . . $ 17.73 $ 10.89 Oil production, workovers . . . . . . . . . . . . . . . . . . . . . . . . . (0.06) 1.45 Total oil production costs . . . . . . . . . . . . . . . . . . . . . . . . 17.67 12.34 Depletion and depreciation . . . . . . . . . . . . . . . . . . . . . . . . 20.78 18.27 Oil production cost and depletion costs . . . . . . . . . . . . . . . . $ 38.45 $ 30.61 The discussion of the results of operations and the period-to-period comparisons presented below analyze our historical results. The following discussion may not be indicative of future results. 85