Rank..by 2010 Oil Equivalent Reserves
Gas..Billion Cubic Feet
Oil..Million Barrels
| Pos | Company | Gas | Oil |
| 1 | National Iranian Oil Company (Iran) opec |
1.045.6 | 315.7 |
| 2 |
Saudi Arabian Oil Company
(Saudi Arabia) opec |
275.2 | 307.1 |
| 3 |
Petroleos de Venezuela S.A.
(Venezuela) opec |
178.8 | 241.7 |
| 4 |
Qatar General Petroleum Corporation
(Qatar) opec |
895.8 | 178.5 |
| 5 |
Iraq National Oil Company
(Iraq) opec |
119.9 | 135.5 |
| 6 |
Abu Dhabi National Oil Company
(UAE) opec |
212.0 | 128.4 |
| 7 |
Kuwait Petroleum Corporation
(Kuwait) opec |
63.0 | 112.2 |
| 8 |
Nigerian National Petroleum Corp.
(Nigeria) opec |
186.8 | 69.1 |
| 9 |
National Oil Company
(Libya) opec |
54.6 | 55.7 |
| 10 |
Sonatrach
(Algeria) opec |
159.0 | 39.3 |
| 11 |
OAO Gazprom
(Russia) |
171.1 | 29.2 |
| 12 |
OAO Rosneft
(Russia) |
27.9 | 22.8 |
| 13 |
PetroChina Co. Ltd.
(China) |
65.5 | 22.4 |
| 14 |
BP Corporation
(United Kingdom) |
44.7 | 17.8 |
| 15 |
Egyptian General Petroleum Corp.
(Egypt) |
77.2 | 17.5 |
| 16 |
ExxonMobil Corporation
(United States) |
46.8 | 17.4 |
| 17 |
Petroleos Mexicanos
(Mexico) |
17.3 | 13.3 |
| 18 |
OAO Lukoil
(Russia) |
23.3 | 13.0 |
| 19 |
Royal Dutch Shell
(Netherlands) |
47.1 | 12.5 |
| 20 |
Petroleo Brasilerio S.A.
(Brazil) |
13.0 | 12.5 |
| 21 |
Sonangol
(Angola) opec |
10.9 | 11.3 |
| 22 |
Chevron Corporation
(United States) |
24.2 | 10.6 |
| 23 |
Petroleum Development Oman LLC
(Oman) |
30.0 | 10.6 |
| 24 |
Total
(France) |
25.7 | 10.3 |
| 25 |
Conoco Phillips
(United States) |
18.2 | 6.7 |
| 26 |
ENI
(Italy) |
17.8 | 6.6 |
| 27 |
Petroleos de Ecuador
(Ecuador) opec |
282.0 | 6.5 |
| 28 |
Petronas
(Malaysia) |
22.8 | 5.9 |
| 29 |
Statoil
(Norway) |
17.9 | 5.1 |
| 30 |
Suncor Energy Inc.
(Canada) |
2.0 | 4.9 |
| 31 |
Dubai Petroleum Company
(UAE) opec |
4.0 | 4.6 |
| 32 |
Pertamina
(Indonesia) opec |
20.5 | 4.4 |
| 33 |
Canadian Natural resource(s)
(Canada) |
3.5 | 3.5 |
| 34 |
Occidental Petroleum Corp.
(United States) |
5.3 | 3.3 |
| 35 |
China National Offshore Oil Corp.
(China) |
6.4 | 3.0 |
| 36 |
Apache Corp.
(United States) |
9.8 | 2.9 |
| 37 |
Devon Energy Corporation
(United States) |
10.2 | 2.9 |
| 38 |
EnCana Corp.
(Canada) |
13.7 | 2.4 |
| 39 |
Repsol YPF
(Spain) |
7.3 | 2.2 |
| 40 |
Anadarko Petroleum Corp.
(United States) |
8.1 | 2.1 |
| 41 |
Chesapeake Energy Corp.
(United States) |
11.3 | 2.0 |
| 42 |
EOG resource(s)
(United States) |
8.4 | 1.9 |
| 43 |
Canadian Oil Sands Ltd
(Canada) |
0 | 1.8 |
| 44 |
Ecopetrol
(Colombia) |
2.4 | 1.8 |
| 45 |
Myanma Oil & Gas Enterprise
(Myanmar) |
10.0 | 1.7 |
| 46 |
Talisman Energy Ltd.
(Canada) |
5.4 | 1.6 |
| 47 |
Hess Corp.
(United States) |
2.5 | 1.5 |
| 48 |
BG Group PLC
(United Kingdom) |
5.9 | 1.4 |
| 49 |
Marathon Oil Corp.
(United States) |
2.6 | 1.0 |
| 50 |
Pioneer Natural resource(s)
(United States) |
2.6 | 1.0 |
opec member