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Significant Concentrations (Tables)
6 Months Ended
Jun. 30, 2019
Segment Reporting [Abstract]  
Schedule of Concentration Risk by Operator

During the six-month periods ended June 30, 2019 and 2018, the joint interest operators that accounted for 10% or more of the Company’s total oil and natural gas revenue for at least one of the periods presented are as follows:

 

Operator  2019   2018 
         
A   52%   17%
B   29%   47%
C   9%   14%
D   -%   10%