completion fluids workover wofmCompletion fluid is the liquid that is kept in the well as it is being completed. A completion fluid is selected to control subsurface presures, to minimize any formation damage, to prevent formation fluids from flowing into the well, and to prevent corrosion of equipment.
Completion fluids include:

a) water-and oil-base muds
b) treated, produced water (salt water)
c) lease crude oil
d) refined oil such as diesel oil
e) water with 2% to 4% KCI, and
f) nitrogen.

The oil-base and oil emulsion muds are for well pressure control. The completion fluid can be left in the annular space between the tubing and the casing, Two types are a) casing pack and b) packer fluid.


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