What type of fluid loss control material should be used after perforating?
Following perforating, back surging, flow back and sand clean out excessive fluid loss should be controlled with a solids free type pill, pills containing solids must not be used. Solid type fluid loss pills, such as, salt pills and ground calcium carbonate will pack off and fill the perforation tunnels. These pills are extremely difficult to remove and may create excessive fracturing pressure because of the blocked perforation tunnels. Solids in the pills have the potential of sticking the gravel pack crossover service tools when they are shifted to the various positions required to execute a gravel pack or frac pack treatment. Solids free fluid loss pills’ are usually a high polymer loading of HEC or Baker Oil Tools BoraPILL a crosslinked pill. Solids free pills avoid the potential of sticking the crossover service tool because they are solid free. The crosslinked pills are preferred because they will minimize the amount of gel leaked off to the formation resulting in less formation
