Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) - Proved Reserve Data (Details)

v3.20.4
SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) - Proved Reserve Data (Details)
bbl in Thousands, Mcf in Thousands, Boe in Thousands
12 Months Ended
Dec. 31, 2020
Boe
Mcf
bbl
Dec. 31, 2020
Boe
bbl
Mcf
Dec. 31, 2020
Boe
bbl
Mcf
Dec. 31, 2020
Boe
MMBoe
bbl
Mcf
Dec. 31, 2019
Boe
Mcf
bbl
Dec. 31, 2019
Boe
bbl
Mcf
Dec. 31, 2019
Boe
bbl
Mcf
Dec. 31, 2019
MMBoe
Boe
bbl
Mcf
Dec. 31, 2018
Boe
Mcf
bbl
Dec. 31, 2018
Boe
bbl
Mcf
Dec. 31, 2018
Boe
Mcf
bbl
Dec. 31, 2018
MMBoe
Boe
Mcf
bbl
Dec. 31, 2017
Boe
Mcf
bbl
Natural Gas                          
Proved Developed and Undeveloped Reserves [Roll Forward]                          
Proved Developed and Undeveloped Reserves, Beginning Balance | Mcf 189,318       135,066       78,121        
Revisions of Previous Estimates | Mcf (21,512)       (5,146)       426        
Extensions, Discoveries and Other Additions | Mcf 8,308       22,019       28,348        
Purchases of Minerals in Place | Mcf         53,969       37,397        
Production | Mcf (16,473)       (16,591)       (9,225)        
Proved Developed and Undeveloped Reserves, Ending Balance | Mcf 159,641       189,318       135,066        
Proved Developed Reserves | Mcf 114,060 114,060 114,060 114,060 116,846 116,846 116,846 116,846 82,315 82,315 82,315 82,315 46,518
Proved Undeveloped Reserve | Mcf 45,581 45,581 45,581 45,581 72,473 72,473 72,473 72,473 52,752 52,752 52,752 52,752 31,603
Oil                          
Proved Developed and Undeveloped Reserves [Roll Forward]                          
Proved Developed and Undeveloped Reserves, Beginning Balance | bbl   131,754       112,973       62,812      
Revisions of Previous Estimates | bbl   (33,289)       (15,497)       3,470      
Extensions, Discoveries and Other Additions | bbl   6,921       19,992       28,516      
Purchases of Minerals in Place | bbl           25,611       25,965      
Production | bbl   (9,361)       (11,325)       (7,790)      
Proved Developed and Undeveloped Reserves, Ending Balance | bbl   96,025       131,754       112,973      
Proved Developed Reserves | bbl 65,135 65,135 65,135 65,135 77,160 77,160 77,160 77,160 62,497 62,497 62,497 62,497 38,593
Proved Undeveloped Reserve | bbl 30,890 30,890 30,890 30,890 54,594 54,594 54,594 54,594 50,476 50,476 50,476 50,476 24,220
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]                          
Proved Developed and Undeveloped Reserves, Beginning Balance | Boe     163,307       135,484       75,832    
Revisions of Previous Estimates     (36,874) (36.9)     (16,355) (16.4)     3,541 3.5  
Extensions, Discoveries and Other Additions | Boe     8,306       23,662       33,241    
Purchases of Minerals in Place             34,606 34.6     32,198 32.2  
Production | Boe     (12,107)       (14,091)       (9,328)    
Proved Developed and Undeveloped Reserves, Ending Balance | Boe     122,632       163,307       135,484    
Proved Developed Reserves | Boe 84,145 84,145 84,145 84,145 96,634 96,634 96,634 96,634 76,216 76,216 76,216 76,216 46,346
Proved Undeveloped Reserves | Boe 38,487 38,487 38,487 38,487 66,673 66,673 66,673 66,673 59,268 59,268 59,268 59,268 29,487