Glossary
| Term | Definition |
|---|---|
| Reflector | An event observed on a seismic section that usually corresponds to a buried rock surface. |
| Reserves | The volume of oil or gas that can be recovered from the subsurface. Generally used in the context of commerciality. |
| Reservoir | A porous rock unit in which hydrocarbons occur in an oil field. |
| Risk | A measure of uncertainty relating to the likelihood of finding hydrocarbons, or, the likelihood that any or all of the individual geological elements required for the accumulation of hydrocarbons is met. |