本文从理论上讨论了井眼崩落与原地应力的关系。证明崩落是井眼周围应力集中的结果,其长轴方向指示最小主应力方向,可根据崩落形状计算应力大小。还介绍了测量统计方法及计算程序,并以sz36—1构造为例,作了尝试性的应用 This paper theoretically discusses the relationship between wellbore collapse and in-situ stress. It is proved that the caving is the result of stress concentration around the wellbore, and the direction of the major axis indicates the direction of the minimum principal stress, and the magnitude of the stress can be calculated according to the shape of the caving. Also introduced the measurement of statistical methods and calculation procedures, and sz36-1 structure as an example, made a tentative application