Source: [ ]
Summary: Exxon Mobile has less than 1% of world gas & oil market
| Rank by | Company | Worldwide | Worldwide | Total Reserves | |
| 2006 Oil | Liquids Reserves, | Natural Gas Reserves, | in Oil Equivalent Barrels, | |
| Equivalent | Million | Billion | Million Barrels | |
| Reserves | Barrels | Cubic Feet | | |
| 1 | National Iranian Oil Company (Iran) 3 | 136,000 | 974,000 | 302,496 | |
| 2 | Saudi Arabian Oil Company (Saudi Arabia) 3 | 259,400 | 248,500 | 302,279 | |
| 3 | Iraq National Oil Company (Iraq) 2,3 | 115,000 | 112,000 | 134,145 | |
| 4 | Qatar General Petroleum Corporation (Qatar)3 | 15,207 | 910,500 | 170,848 | |
| 5 | Abu Dhabi National Oil Company (UAE) 3 | 92,200 | 198,500 | 126,132 | |
| 6 | Kuwait Petroleum Corporation (Kuwait) 3 | 99,000 | 54,500 | 108,316 | |
| 7 | Petroleos de Venezuela.S.A. (Venezuela) 3 | 80,120 | 152,380 | 106,060 | |
| 8 | Nigerian National Petroleum Corporation (Nigeria) 3 | 36,220 | 181,900 | 67,314 | |
| 9 | National Oil Company (Libya) 2,3 | 41,464 | 52,650 | 50,464 | |
| 10 | Sonatrach (Algeria) 2,3 | 12,270 | 161,740 | 39,918 | |
| 11 | Gazprom (Russia) | 0 | 171,176 | 29,261 | |
| 12 | PetroChina Co. Ltd. (China) | 11,618 | 53,469 | 20,758 | |
| 13 | OAO Rosneft (Russia) | 15,963 | 24,758 | 20,195 | |
| 14 | Petronas (Malaysia) | 5,300 | 82,096 | 19,334 | |
| 15 | OAO Lukoil (Russia) | 15,927 | 26 | 15,931 | |
| 16 | Petroleos Mexicanos (Mexico) | 12,849 | 13,856 | 15,218 | |
| 17 | ExxonMobil Corporation (United States) | 8,194 | 32,480 | 13,746 | 0.807786% |
| 18 | BP Corporation (United Kingdom) | 5,893 | 45,931 | 13,744 | |
| 19 | Egyptian General Petroleum Corp. (Egypt) 2 | 3,700 | 58,500 | 13,700 | |
| 20 | Chevron Corporation (United States) | 7,806 | 22,894 | 11,720 | |
| 21 | ConocoPhillips (United States) | 6,696 | 26,835 | 11,283 | |
| 22 | Total (France) | 6,592 | 25,539 | 10,958 | |
| 23 | Petroleum Development Oman LLC (Oman) | 5,500 | 30,000 | 10,628 | |
| 24 | Petroleo Brasilerio S.A. (Brazil) | 9,418 | 1,166 | 9,618 | |
| 25 | Royal Dutch/Shell (Netherlands) | 3,270 | 30,058 | 8,408 | |
| 26 | Sonangol (Angola) | 8,000 | 2,000 | 8,342 | |
| 27 | ENI (Italy) | 3,481 | 16,965 | 6,381 | |
| 28 | Dubai Petroleum Company (United Arab Emirates) 2,3 | 4,000 | 4,000 | 4,684 | |
| 29 | Petroleos de Ecuador (Ecuador) | 4,517 | NR | 4,517 | |
| 30 | Pertamina (Indonesia) 3 | 903 | 20,538 | 4,414 | |
| 31 | Statoil (Norway) | 1,675 | 14,255 | 4,112 | |
| 32 | EnCana Corp. (Canada) | 1,133 | 12,418 | 3,256 | |
| 33 | Anadarko Petroleum Corporation (United States) | 1,264 | 10,486 | 3,056 | |
| 34 | Occidental Petroleum Corporation (United States) | 2,264 | 3,810 | 2,915 | |
| 35 | China National Offshore Oil Corp. (China) | 1,490 | 6,232 | 2,555 | |
| 36 | Repsol YPF (Spain) | 1,057 | 8,718 | 2,548 | |
| 37 | Devon Energy Corporation (United States) | 983 | 8,356 | 2,411 | |
| 38 | Apache Corp. (United States) | 1,061 | 7,513 | 2,345 | |
| 39 | Ecopetrol (Columbia) | 1,453 | 3,996 | 2,136 | |
| 40 | Canadian Natural Resources (Canada) | 1,316 | 3,798 | 1,965 | |
| 41 | Norsk Hydro ASA (Norway) | 748 | 6,611 | 1,878 | |
| 42 | Talisman Energy Ltd. (Canada) | 767 | 5,400 | 1,690 | |
| 43 | Romanian National Oil Co. (Romania) 2 | 940 | 3,550 | 1,547 | |
| 44 | BG Group PLC (United Kingdom) | 432 | 5,928 | 1,445 | |
| 45 | BHP Billiton Ltd (Australia) | 551 | 4,867 | 1,383 | |
| 46 | Petro-Canada (Canada) | 950 | 1,945 | 1,282 | |
| 47 | Hess Corp. (United States) | 832 | 2,466 | 1,254 | |
| 48 | Nexen Inc. (Canada) | 946 | 618 | 1,052 | |
| 49 | Shell Canada Ltd. (Canada) | 8 | 1,400 | 1,047 | |
| 50 | Canadian Oil Sands Trust (Canada) | 1,000 | 0 | 1,000 | |
| | | | | 1,701,689 | |
