Balance, December 31, 2017

​

$

9,055,697

Liabilities acquired

​

$

2,571,549

Liabilities incurred

​

​

1,311,956

Liabilities settled

​

​

(577,824)

Revision of estimate (1)

​

​

87,960

Accretion expense

​

​

606,459

Balance, December 31, 2018

​

$

13,055,797

Liabilities acquired

​

$

3,745,642

Liabilities incurred

​

​

631,727

Liabilities settled

​

​

(1,589,654)

Accretion expense

​

​

943,707

Balance, December 31, 2019

​

$

16,787,219

Liabilities incurred

​

​

99,436

Liabilities settled

​

​

(710,577)

Revision of estimate (1)

​

​

34,441

Accretion expense

​

​

906,616

Balance, December 31, 2020

​

$

17,117,135