STUDY AND APPLICATION CHANNELING-PREVENTING FILTRATION CONTROL AGENT J-2B

J-2B channeling-preventing filtration control agent was innovated by the joint efforts of Henan Oilfield and Engineering Technology Research Institute of CNPC. The rig-site applications of 7 wells shown that up to standard cementing quality rate was 100%, super cementing quality rate was 42.9%. A good beneficence was achieved. It can reduce cement slurry filtration, provide a channeling-preventing effect and mitigate corrosion of formation fluids on cement ring.