Gulfport Energy Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Supplemental Information on Oil and Gas Exploration and Production Activities (Unaudited) - Oil and Gas Reserves (Details)

Supplemental Information on Oil and Gas Exploration and Production Activities (Unaudited) - Oil and Gas Reserves (Details) bbl in Thousands, Mcf in Thousands	12 Months Ended
	Dec. 31, 2019 bbl Mcf	Dec. 31, 2018 bbl Mcf	Dec. 31, 2017 bbl Mcf
Oil derivatives
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	21,050	19,157	5,546
Purchases in oil and natural gas reserves in place	0	0	15,132
Extensions and discoveries	3,612	5,205	951
Sales of oil and natural gas reserves in place	(2,369)	(134)	0
Revisions of prior reserve estimates	(1,749)	(377)	107
Current production	(2,186)	(2,801)	(2,579)
End of period	18,357	21,050	19,157
Proved developed reserves	7,887	9,570	10,245
Proved undeveloped reserves	10,470	11,480	8,912
NGL derivatives
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period \| Mcf	4,133,889	4,825,310	2,167,068
Purchases in oil and natural gas reserves in place \| Mcf	0	0	1,098,644
Extensions and discoveries \| Mcf	997,014	622,271	1,594,734
Sales of oil and natural gas reserves in place \| Mcf	(62,557)	(43,444)	0
Revisions of prior reserve estimates \| Mcf	(561,890)	(826,506)	314,925
Current production \| Mcf	(458,178)	(443,742)	(350,061)
End of period \| Mcf	4,048,279	4,133,889	4,825,310
Proved developed reserves \| Mcf	1,757,303	1,813,184	1,616,930
Proved undeveloped reserves \| Mcf	2,290,976	2,320,705	3,208,380
Natural gas liquids
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	80,520	75,766	20,127
Purchases in oil and natural gas reserves in place	0	0	53,617
Extensions and discoveries	12,992	9,631	4,619
Sales of oil and natural gas reserves in place	0	(112)	0
Revisions of prior reserve estimates	(26,909)	1,228	2,737
Current production	(5,074)	(5,993)	(5,334)
End of period	61,528	80,520	75,766
Proved developed reserves	29,898	40,810	36,247
Proved undeveloped reserves	31,630	39,710	39,519
Investment in Grizzly Oil Sands ULC \| Oil derivatives
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	0	0	0
Purchases in oil and natural gas reserves in place	0	0	0
Extensions and discoveries	0	0	0
Revisions of prior reserve estimates	0	0	0
Current production	0	0	0
End of period	0	0	0
Proved developed reserves	0	0	0
Proved undeveloped reserves	0	0	0
Investment in Grizzly Oil Sands ULC \| NGL derivatives
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period \| Mcf	0	0	0
Purchases in oil and natural gas reserves in place \| Mcf	0	0	0
Extensions and discoveries \| Mcf	0	0	0
Revisions of prior reserve estimates \| Mcf	0	0	0
Current production \| Mcf	0	0	0
End of period \| Mcf	0	0	0
Proved developed reserves \| Mcf	0	0	0
Proved undeveloped reserves \| Mcf	0	0	0
Investment in Grizzly Oil Sands ULC \| Natural gas liquids
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning of the period	0	0	0
Purchases in oil and natural gas reserves in place	0	0	0
Extensions and discoveries	0	0	0
Revisions of prior reserve estimates	0	0	0
Current production	0	0	0
End of period	0	0	0
Proved developed reserves	0	0	0
Proved undeveloped reserves	0	0	0