Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

v3.19.1
SUBSEQUENT EVENTS (Details)
Mar. 31, 2019
bbl
$ / BarrelofOilEquivalent
Dec. 31, 2018
$ / BarrelofOilEquivalent
Sep. 25, 2017
bbl
Number of Barrels Per Day | bbl 3,500   1,000
Period One [Member]      
Number of Barrels Per Day | bbl 1,000    
Period Two [Member]      
Number of Barrels Per Day | bbl 1,000    
Period Three [Member]      
Number of Barrels Per Day | bbl 1,000    
Period Four [Member]      
Number of Barrels Per Day | bbl 1,000    
Put price [Member]      
Derivative, Price Risk Option Strike Price   49.00  
Put price [Member] | Period One [Member]      
Derivative, Price Risk Option Strike Price 50.00    
Put price [Member] | Period Two [Member]      
Derivative, Price Risk Option Strike Price 50.00    
Put price [Member] | Period Three [Member]      
Derivative, Price Risk Option Strike Price 50.00    
Put price [Member] | Period Four [Member]      
Derivative, Price Risk Option Strike Price 50.00    
Call price [Member]      
Derivative, Price Risk Option Strike Price   54.60  
Call price [Member] | Period One [Member]      
Derivative, Price Risk Option Strike Price 69.50    
Call price [Member] | Period Two [Member]      
Derivative, Price Risk Option Strike Price 70.20    
Call price [Member] | Period Three [Member]      
Derivative, Price Risk Option Strike Price 65.83    
Call price [Member] | Period Four [Member]      
Derivative, Price Risk Option Strike Price 65.40