Month: July 2009

Well stimulation involves techniques to optimize well performance. This may include pumping of acids, energized fluids, and various other chemicals to improve formation flow characteristics.

The recording of information about subsurface geologic formations, including records kept by the driller and records of mud and cutting analyses, core analysis, drill stem tests, and electric, acoustic, and radioactivity procedures. 

A protective structure built around an offshore well to keep boats or floating debris from damaging the wellhead

The fluid, usually a combination of gas, oil, water, and suspended sediment, that comes out of a reservoir

The permanent plugging of a dry hole or of a well that no longer produces petroleum or is no longer capable of producing petroleum profitably. Several steps are involved in the abandonment of a well: permission for abandonment and procedural requirements are secured from official agencies; the casing is removed and salvaged if possible; and one or more cement plugs and/or mud are placed in the borehole to prevent migration of fluids between the different formations penetrated by the borehole

DTI defines a well to be a borehole drilled into the earth from a single surface or subsurface location to a single subsurface location. If the surface location changes but the target location stays the same then a new well is regarded as a respud of the first well. If the target location changes but the surface location stays the same the new well is called a geological sidetrack. If a sidetrack is made to bypass an obstruction while the surface and target locations remain the same this is called a mechanical sidetrack. A well may be drilled intentionally into an existing well. Wells include finder wells (cheap wells designed to gather minimum essential data), exploration wells, production wells, sidetrack wells, multi lateral wells.

This document contains details of the welding test

A WPS is a document that describes how welding is to be carried out in production.  They are recommended for all welding operations and many application codes and standards make them mandatory. They should include sufficient details to enable any competent person to apply the information and produce a weld of acceptable quality