| about oil and gas | 1.77 | 0.8 | 3532 | 17 | 52 |
| about oil and gas industry | 1.34 | 0.4 | 6915 | 26 | 98 |
| about oil and gas company | 0.78 | 0.2 | 740 | 25 | 94 |
| about oil and gas production | 1.27 | 0.2 | 5140 | 28 | 14 |
| about oil and gas engineering | 0.99 | 0.3 | 7402 | 29 | 84 |
| about oil and gas companies in nigeria | 0.06 | 0.5 | 2145 | 38 | 18 |
| about oil and gas company write downstream | 0.9 | 0.7 | 3497 | 42 | 24 |
| gas and oil investments | 1.92 | 0.5 | 9207 | 23 | 33 |
| switch from oil to gas | 1.51 | 0.8 | 7104 | 22 | 47 |
| west virginia oil and gas | 1.06 | 0.9 | 791 | 25 | 82 |
| tamm oil and gas | 0.53 | 0.1 | 9762 | 16 | 97 |
| mba oil and gas | 0.13 | 0.7 | 4021 | 15 | 77 |
| malaysian oil and gas companies | 1.09 | 0.1 | 9522 | 31 | 3 |
| software for oil and gas industry | 1.12 | 0.9 | 728 | 33 | 25 |
