文章分析了川东地区复杂地质条件下钻井作业中发生井塌的主要原因及高角度地层井塌、易水化地层井塌、地应力引起的井塌以及工程因素引起的井塌等几种常见井塌类型.同时介绍了川东地区防止井塌的方法,采用防塌钻井液、确定合理的钻井液密度,在地应力强烈的区域钻井应寻找应力较小或改变井眼轨迹等工程技术手段处理井塌,以及井塌的预防和处理中存在的问题和今后的研究方向.“,”The main reasons of the well slough occurred in the course of drilling under the complex geological conditions in east Sichuan region and several common types of well slough(caused by high angle formation,by easy to hydrate formation,by ground stress and by engineering factors etc.)are analyzed in this paper.The anti sloughing methods for east Sichuan region(i.e. using anti sloughing drilling fluid,determining reasonable drilling fluid density and finding zone with smaller stress or changing well path in the area with strong ground stress etc.)and the problems in preventing and treating well slough and research direction in future are introduced also.