18 July 2017

Stratification

The natural layering or lamination characteristic of sediments and sedimentary rocks.
18 July 2017

Stratigraphic trap

A petroleum trap that occurs when the top of the reservoir bed is terminated by other beds or by a change of porosity or permeability within […]
18 July 2017

String

The entire length of casing, tubing, sucker rods, or drill pipe run into a hole.
25 July 2017

Stripping

The process of running the drillstring into or out of the well under “Kick” conditions (see Kick). Normally through a closed annular BOP but may be […]