Reserves


Summary of Reserves and Resources at Licence 61 from the Ryder Scott report of 1 January 2011.

Ryder Scott Estimated Reserves in oil fields of Licence 61

Licence 61 (Tungolsky)
Map Index Oil Field Name Proved Proved &
Probable		 Proved,
Probable &
Possible


1P, mmbo 2P, mmbo 3P, mmbo
1 Lineynoye 5.15 22.74 28.47
2 Tungolskoye 1.38 15.48 19.63
3 West Lineynoye 2.71 23.32 29.22
5 Kondrashevskoye 0.61 8.12 26.13
7 Arbuzovskaya 1.95 13.24 16.56
Total 11.8 82.9 120.01
  • All oil in discovered fields is at the Upper Jurassic horizon.


Ryder Scott Estimated Unrisked Possible Reserves and Resources for Licence 61 structures

Map Index Prospect Name Lower Cretaceous,
million bbls		 Upper Jurassic,
million bbls		 Lower to Middle Jurassic,
million bbls		 Total,
million bbls
2 Tungolskoye West Lobe 0 6.03 0 6.03
2 Tungolskoye North 0 4.96 0 4.96
4 Lineynoye Lower 0 4.61 0 4.61
6 West Korchegskaya 0 0 7.18 7.18
8 Varyakhskaya North 0 6.03 0 6.03
8 Varyakhskaya Upper 0 9.06 0 9.06
9 Emtorskaya East 0 3.92 0 3.92
10 Emtorskaya Crown 0 15.48 0 15.48
11 Sigayevskaya 0 2.21 0 2.21
12 Sigayevskaya East 0 3.56 0 3.56
13 Kulikovskaya 0 5.14 0 5.14
13 Kulikovskaya North 0 7.75 0 7.75
14 Kusinsky 7.38 5.23 2.76 15.37
14 North Kusinsky 7.88 5.5 2.64 16.02
15 Tuganskaya 36.15 0 10.60 46.75
15 Tuganskaya East 33.3 4.79 5.34 43.44
15 Tuganskaya South 7.48 4.86 0 12.34
16 Kirillovskaya 8.3 7.11 1.63 17.05
16 South Kirillovskaya 6.75 15.85 2.02 24.62
16 East Kirillovskaya 28.31 9.58 16.63 54.52
16 West Kirillovskaya 9.15 6.34 6.67 22.17
17 North Balkinskaya 0 8.21 3.13 11.34
18 Traverskaya 11.47 8.2 4.43 24.1
19 Tungolskoye East 0 3 0 3
20 Sibkrayevskaya 0 44.07 0 44.07
Total Possible Reserves and Resources for Licence 61 156.17 191.49 63.03 410.72
  • All Prospect Possible Reserves and Resources are based on structures with unequivocal four-way dip closure.
  • Prospects highlighted in green have previous wells drilled on the structure with electrical logs showing potential pay in the horizons identified above. These are Possible (P3) reserves.
  • Prospect Possible Reserves (P3) and Resources (P4) are based on a probabilistic P50 case.
  • Tuganskaya and Tuganskaya East are one closed structure at Middle/Lower Jurassic level.
  • Kusinsky, Tuganskaya and Tuganskaya East are one closed structure at Cretaceous level.

Ryder Scott Estimated Reserves in oil fields of Licence 67

Licence 67 — Updated seismic map
Map Index Oil Field Name Proved Proved &
Probable		 Proved,
Probable &
Possible


1P, mmbo 2P, mmbo 3P, mmbo
2 Ledovoye 1.54 14.02 17.42
Total 1.54 14.02 17.42
  • All oil in discovered fields is at the Upper Jurassic horizon.

Ryder Scott Estimated Unrisked Possible Reserves and Resources for Licence 67 structures

Map Index Prospect Name Lower Cretaceous,
million bbls		 Upper Jurassic,
million bbls		 Lower to Middle Jurassic,
million bbls		 Total,
million bbls
1 Cheremshanskaya 35.683 32.02 67.70
6 Levo-Ilyakskaya 0.99
7 Syglynigaiskaya 1.85
8 North Grushevaya 6.79 5.34 12.13
10 Malostolbovaya 4.59
11 Nizhenolomovaya Terassa Group (1-4) 1.98
14 East Cheremshanskaya 1.89
15 East Ledovoye 1.42
Total Possible Reserves and Resources for Licence 67 0 55.20 37.35 79.825
  • All Prospect Possible Reserves and Resources are based on structures with unequivocal four-way dip closure.
  • Prospects highlighted in green have previous wells drilled on the structure with electrical logs showing potential pay in the horizons identified above. These are Possible (P3) reserves.
  • Prospect related Possible Reserves (P3) and Resources (P4) are based on a probabilistic P50 case.