A part of the continental shelf located in a certain sector. The block is demarcated and positioned according to a further coordinate specification and usually divided into smaller areas.
Lifting
A tanker load of crude.
Liftings costs
Production costs.
Liner
Thinly perforated casing through which the oil or gas flows in order to get into the production tubing.
Also a joint to lower into the wellbore in order to seal off an especially porous point where mud is lost or where water penetrates.
Logging/mud analyses
A continual analysis of the drilling slag that circulates in the well. The purpose is to log any trace of oil or gas.
Loss of returns/circulation
Disappeared drilling mud.
Lost circulation material
Those materials added to the drilling mud so they can penetrate into the cracks in the subsoil where the drilling mud otherwise may disappear.
