Oil drilling

1. The stage in which a well is created vertically into the ground
3. The stage in which the well had reached the end of its useful life and plugged and abandoned.
5. Wells used to find new areas
11. In the Completion stage, these holes are made in the portion of the casing passed through the production zone
13. The step in which drilling mud is circulated into the hole and back to the surface
16. Characteristics of a proven petroleum which are assessed in Appraisal Wells
17. the stage in which the well starts producing oil/gas

2. A problem occurring because of the increase of carbon dioxide in the atmosphere
4. Largest oil spill in petroleum history
6. Wells that stop the flow from a reservoir in a blowout
7. Antelope most affected by drilling in their migration
8. Holiday made due to the environmental advocacy movement.
9. The process whereby a hole is bored using a drill bit to create a well for oil and natural gas production
10. Product used to prevent collapse of the well
12. The place where the Exxon Valdez Oil spill occured
14. A well drilled to enable petroleum engineers to inject steam and others into an oul producing unit
15. another name for a well drilled for the production of oil and gas