Definition(s)
Displacement Fluid
In oil well cementing, the fluid, usually drilling mud or salt water, that is pumped into the well after the cement is pumped to displace the cement from the casing and into the annulus and to prevent the cement from re-entering the casing after pumping stops.
Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards