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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 Extensions (Billion Cubic Feet)
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|Montana Nonassociated Natural Gas, Wet After Lease Separation, Reserves Extensions (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                                                                                                                            |        |        |        |        |        |        |        |        |        | 40    
|1980's                                                                                                                            | 24     | 47     | 29     | 25     | 36     | 2      | 5      | 1      | 0      | 128   
|1990's                                                                                                                            | 39     | 17     | 15     | 0      | 0      | 0      | 1      | 21     | 0      | 12    
|2000's                                                                                                                            | 53     | 22     | 83     | 122    | 116    | 92     | 123    | 64     | 67     | 28    
|2010's                                                                                                                            | 47     | 0      | 0      | 0      | 0      | 0      | --     | --     | --     | --    
|2020's                                                                                                                            | --     | --     |        |        |        |        |        |        |        |       
|- = 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