井漏的产生核心原因是由于井筒内钻井液液柱压力大于地层压力而产生的正压差导致钻井液向地层中孔隙、裂缝及溶洞等的漏失。针对四川威远区块栖霞组岩性及施工井井漏案例研究,分析井漏成因,同时对堵漏措施进行研究,选择针对性堵漏措施,提高堵漏成功率,降低井漏风险。 The core cause of the well leakage is that the positive pressure difference caused by the pressure of the liquid column in the wellbore greater than the formation pressure leads to the leakage of drilling fluid into the pores, cracks and caves in the formation. According to the case study of the lithology of the Qixia Formation in Weiyuan, Sichuan Province and the case of the well of the construction well, the causes of the well leakage are analyzed. At the same time, the measures of plugging are studied. The selective plugging measures are selected to improve the plugging success rate and reduce the risk of the well.