18 July 2017

Oil zone

A formation or horizon of a well from which oil may be produced. The oil zone is usually immediately under the gas zone and on top […]
18 July 2017

Oilfield

The surface area overlying an oil reservoir or reservoirs. The term usually includes not only the surface area, but also the reservoir, the wells, and the […]
18 July 2017

Open

1) of a wellbore, having no casing. 2) of a hole, having no drill pipe or tubing suspended in it.
18 July 2017

Open hole

1) any wellbore in which casing has not been set. 2) open or cased hole in which no drill pipe or tubing is suspended. 3) the […]