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Oil and Natural Gas Properties
 6 Months Ended
Jun. 30, 2023
Extractive Industries [Abstract]  
Oil and Natural Gas Properties Oil and Natural Gas Properties
Oil and natural gas properties are summarized below:
June 30, 2023December 31, 2022
(In thousands)
Proved$836,379 $516,011 
Unproved111,600 12,770 
Work-in-progress54,560 45,169 
1,002,539 573,950 
Accumulated depletion, amortization and impairment(160,648)(133,848)
Total oil and natural gas properties, net$841,891 $440,102 
Depletion and amortization expense for proved oil and natural gas properties was $17.9 million and $7.0 million, respectively, for the three months ended June 30, 2023 and 2022 and $26.8 million and $13.4 million, respectively, for the six months ended June 30, 2023 and 2022.
Exploration expense was $80 thousand and $22 thousand, respectively, for the three months ended June 30, 2023 and 2022 and $0.4 million and $1.5 million, respectively, for the six months ended June 30, 2023 and 2022.
On April 3, 2023, the Company closed on the New Mexico Acquisition. For further information regarding the acquisition, see Note 4 - Acquisitions of Oil and Natural Gas Properties.