​

  ​ ​ ​

June 30, 

​

December 31, 

​

​

2026

​

2025

​

​

(In thousands)

Oil and natural gas properties

​

​

​

​

​

​

Proved properties

​

$

2,227,209

​

$

2,097,281

Unevaluated properties

​

​

190,380

​

​

174,189

Less: accumulated depreciation, depletion and impairment

​

​

(1,207,591)

​

​

(1,148,157)

Total oil and natural gas properties

​

$

1,209,998

​

$

1,123,313

​

​

​

​

​

​

​

Costs not subject to depletion

​

​

​

​

​

​

Incurred in 2026

​

$

72,441

​

​

​

Incurred in 2025

​

​

98,279

​

​

​

Incurred in 2024

​

​

—

​

​

​

Prior

​

​

19,660

​

​

​

Total costs not subject to depletion

​

$

190,380

​

​

​