Completion fluids are typically brines (chlorides, bromides and formates), but in theory could be any nondamaging fluid of proper density and flow characteristics.

• 完井液典型的是盐水（氯化物、溴化物和甲酸盐类），但是从理论上讲，可能是任何合适密度和良好流动性能的无损害流体。