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Property and Equipment (Tables)
6 Months Ended
Jun. 30, 2018
Property, Plant and Equipment [Abstract]  
Property and equipment

Property and equipment at June 30, 2018 and December 31, 2017 consisted of the following:

 

(Thousands of dollars)    June 30,
2018
     December 31,
2017
 

Proved oil and gas properties, at cost

   $ 490,522      $ 476,570  

Less: Accumulated depletion and depreciation

     (274,601      (263,569
  

 

 

    

 

 

 

Oil and Gas Properties, Net

   $ 215,921      $ 213,001  
  

 

 

    

 

 

 

Field and office equipment

   $ 26,690      $ 26,241  

Less: Accumulated depreciation

     (19,811      (19,267
  

 

 

    

 

 

 

Field and Office Equipment, Net

   $ 6,879      $ 6,974  
  

 

 

    

 

 

 

Total Property and Equipment, Net

   $ 222,800      $ 219,975