Which of Gulfport Energy's energy reserves had the greatest Production Replacement Ratio in 2018? Note: The image is the company's energy reserves for 2018. 2018 Oil Natural Gas (MMcf) Natural Gas Liquids (MBbls) (MBbls) 19.157 4,825,310 75,766 Proved Reserves Beginning of the period Purchases in oil and natural gas reserves in place Extensions and discoveries Sales of oil and natural gas reserves in place Revisions of prior reserve estimates Current production End of period 5,205 622,271 9,631 (134) (43,444) (112) (377) (2,801) 21,050 (826,506) (443,742) 4,133,889 1,228 (5,993) 80,520 oil natural gas natural gas liquids oil and natural gas liquids had the same % replacement