Perforation:

Usually several perforations are made at a time.

Terms Related to Perforation

• Gun-perforate

  To create holes in casing and cement set through a productive formation. A common method of completing a well is to set casing through the ...

• Perforation depth control log (pdc log)

  A special type of nuclear log that measures the depth of each casing collar. Knowing the depth of the collars makes it easy to determine ...

• Openhole

  The uncased portion of a well. All wells, at least when first drilled, have openhole sections that the well planner must contend with. Prior to ...

• Sonic log

  A type of acoustic log that records the travel time of sounds through objects, cement, or formation rocks. Often used to determine whether voids exist ...

• Bullet perforator

  A tubular device that, when lowered to a selected depth within a well, fires bullets through the casing to provide holes through which the formation ...

• Wireline formation tester

  A formation fluid sampling device, actually run on conductor line rather than wireline, that also logs flow and shut-in pressure in rock near the borehole. ...

• Perforate

  To pierce the casing wall and cement to provide holes through which formation fluids may enter or to provide holes in the casing so that ...