Formation damage:

Often call skin damage.

Terms Related to Formation damage

• Skin

  1. The area of the formation that is damaged because of the invasion of foreign substances into the exposed section of the formation adjacent to ...

• Clay swelling

  A type of damage in which formation permeability is reduced because of the alteration of clay equilibrium. Clay swelling occurs when water-base filtrates from drilling, ...

• Completion fluid

  Low-solids fluid or drilling mud used when a well is being completed. It is selected not only for its ability to control formation pressure, but ...

• Water block

  1. A reduction in the permeability of a formation caused by the invasion of water into the pores. 2. A relative permeability problem usually occurring ...

• Absolute permeability

  A measure of the ability of a single fluid (such as water, gas, or oil) to flow through a rock formation when the formation is ...

• Cavitation

  The formation and collapse of vapor- or gas-filled cavities that result from a sudden decrease and increase of pressure. Cavitation can cause mechanical damage to ...

• Gall

  Damage to steel surfaces caused by friction and improper lubrication.