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|View History: Annual Download Data (XLS File)                                                                 
|View History: Annual                                                                                           
|View History: Annual                                                                                           
|View History:                                                                                                  
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|Montana Nonassociated Natural Gas, Wet After Lease Separation, Reserves Revision Increases (Billion Cubic Feet)
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|Montana Nonassociated Natural Gas, Wet After Lease Separation, Reserves Revision Increases (Billion Cubic Feet)
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|Decade                                                                                                                            | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9
|--------------------------------------------------------------------------------------------------------------------------------- | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------
|1970's                                                                                                                            |        |        |        |        |        |        |        |        |        | 35    
|1980's                                                                                                                            | 48     | 91     | 56     | 44     | 47     | 46     | 35     | 40     | 24     | 80    
|1990's                                                                                                                            | 15     | 12     | 15     | 18     | 18     | 127    | 52     | 96     | 106    | 56    
|2000's                                                                                                                            | 121    | 70     | 34     | 39     | 47     | 44     | 15     | 34     | 30     | 8     
|2010's                                                                                                                            | 65     | 12     | 6      | 65     | 76     | 4      | 49     | 13     | 30     | 0     
|2020's                                                                                                                            | 39     | 2      |        |        |        |        |        |        |        |       
|- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
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|Release Date: 12/30/2022                                                                                                         
|Next Release Date: 12/29/2023