Glossary
UKCS |
United Kingdom Continental Shelf. |
Unconformity |
a tectonic feature in which strata are eroded and subsequently overlain with younger strata (sometimes angularly), which are said to lie unconformably on the older strata; the actual boundary between the two sets of strata. |
Unconformity trap |
a trap in which the escape of hydrocarbons is prevented by impervious rocks unconformably overlying the reservoir |
Unitisation |
when owners or oil and/or gas reserves pool their individual interests in return for an interest in the overall unit, which is then operated by a single company on behalf of the group, thus increasing efficiency. |
Updip |
the opposite of downdip. |
Upstream |
those activities relating to the exploration, production and delivery to an export terminal of crude oil. |