Keywords hole caving;lost circulation;anti sloughing mud;temperary plugging agent;mud performance control;Eogene;Lunpola basin;XL4 well Li Li;working in No 4 Surveying and Exploration Team of MGMR.;

• 井塌;井漏;防塌钻井液;钾盐钻井液;屏蔽暂堵剂;钻井液性能控制;第三纪伦坡拉盆地;XL4井;