Annual report pursuant to Section 13 and 15(d)

Asset Retirement Obligations (Details)

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Asset Retirement Obligations (Details) - Solaris Midstream Holdings, LLC and Subsidiaries - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Changes in asset retirement obligations    
Asset Retirement Obligations at January 1, $ 5,291 $ 3,375
Liabilities Incurred 585 936
Liabilities Incurred on Acquisition   776
Reduction for Assets Sold   (22)
Accretion Expense 282 226
Asset Retirement Obligations at December 31 $ 6,158 $ 5,291