大庆油田使用的ＪＧＮ－Ａ重钻井液体系，存在稳定性差、粘度和切力上升快、动塑比不理想等问题、使用新型钻井液加重材料──活化重晶石代替普通重晶石加重后，解决了ＪＧＮ—Ａ重钻井液存在的问题，同时还节省了加重材料、水、处理剂的用量，减少了重钻井液的排放量。文中介绍了活化重晶石的基本原理、室内评价和现场试验情况，认为活化重晶石具有广阔的应用前景和推广价值。 The JGN-A heavy drilling fluid system used in Daqing Oilfield has some problems such as poor stability, fast rise of viscosity and shear force, unsatisfactory ratio of plastic to plastic and so on. After using aggrandizement material of new drilling fluid, activated barite instead of common barite , Solves the existing problems of JGN-A heavy drilling fluid, saves the amount of material, water and treating agent, and reduces the discharge of heavy drilling fluid. The basic principle, indoor evaluation and field test of activated barite are introduced in this paper. It is believed that activated barite has broad application prospect and popularization value.