Keywords plugging/sealing agent;ultrafine cement slurry;thixotropic fluid;channelling shutoff;casing leakoff remedy;water plugging;composition/formulation;Zhongyuan oil fields;

• 封窜堵漏剂;超细水泥浆;触变性流体;封堵管外窜槽;封堵套漏;堵水;配方研究;中原油田;