Glossary

This glossary more specifically relates to oil and gas exploration and production terms.

Weather window:: Period of time (from a few hours to a few days) during which the weather service thinks fair weather will last long enough to carry out tricky large-scale operations at sea, such as maneuvering a platform, installing a jacket or a deck.
Well:: Hole drilled underground for oil exploration and operation. By extension, any apparatus used for this purpose.
Well-logging:: Electrical recording of physical characteristics of rocks traversed by a well.
Wellhead, or "Christmas tree":: All connections, valves, nozzles, pressure gages, thermometers, and so forth, installed at the exit from a production well.
White product:: A term used to refer to the lightest products resulting from the refining process, because of their transparent appearance.