|
|
|
|
|
|
|
|
| |
|
|
Oil and gas properties |
|
Vehicles and office equipment and others |
|
Total |
|
| |
|
|
|
|
|
|
|
|
| |
|
Cost: |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
| |
|
At January 1, 2016 |
803,986 |
|
5,296 |
|
809,282 |
|
| |
|
Additions |
44,302 |
|
236 |
|
44,538 |
|
| |
|
Disposals and write-offs |
(6,365) |
|
(37) |
|
(6,402) |
|
| |
|
Exchange differences |
25,703 |
|
205 |
|
25,908 |
|
| |
|
|
|
|
|
|
|
|
| |
|
At December 31, 2016 |
867,626 |
|
5,700 |
|
873,326 |
|
| |
|
|
|
|
|
|
|
|
| |
|
At January 1, 2017 |
867,626 |
|
5,700 |
|
873,326 |
|
| |
|
Additions |
48,937 |
|
99 |
|
49,036 |
|
| |
|
Disposals and write-offs |
(2,577) |
|
(914) |
|
(3,491) |
|
| |
|
Exchange differences |
(24,985) |
|
(148) |
|
(25,133) |
|
| |
|
|
|
|
|
|
|
|
| |
|
At December 31, 2017 |
889,001 |
|
4,737 |
|
893,738 |
|
| |
|
|
|
|
|
|
|
|
| |
|
Accumulated depreciation, depletion and amortization and impairment: |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
| |
|
At January 1, 2016 |
(353,824) |
|
(1,317) |
|
(355,141) |
|
| |
|
Depreciation charge for the year |
(67,906) |
|
(397) |
|
(68,303) |
|
| |
|
Impairment |
(10,768) |
|
- |
|
(10,768) |
| ||
|
Disposals and write-offs |
3,532 |
|
34 |
|
3,566 |
|
| |
|
Exchange differences |
(10,157) |
|
(58) |
|
(10,215) |
|
| |
|
|
|
|
|
|
|
|
| |
|
At December 31, 2016 |
(439,123) |
|
(1,738) |
|
(440,861) |
|
| |
|
|
|
|
|
|
|
|
| |
|
At January 1, 2017 |
(439,123) |
|
(1,738) |
|
(440,861) |
|
| |
|
Depreciation charge for the year |
(60,442) |
|
(360) |
|
(60,802) |
| ||
|
Impairment |
(8,639) |
|
- |
|
(8,639) |
|
| |
|
Disposals and write-offs |
1,185 |
|
258 |
|
1,443 |
|
| |
|
Exchange differences |
10,932 |
|
57 |
|
10,989 |
|
| |
|
|
|
|
|
|
|
|
| |
|
At December 31, 2017 |
(496,087) |
|
(1,783) |
|
(497,870) |
|
| |
|
|
|
|
|
|
|
|
| |
|
Net book value: |
|
|
|
|
|
|
| |
|
At December 31, 2016 |
428,503 |
|
3,962 |
|
432,465 |
|
| |
|
|
|
|
|
|
|
|
| |
|
At December 31, 2017 |
392,914 |
|
2,954 |
|
395,868 |
|
| |
|
|
|
|
|
|
|
|
| |