Fracture width calculated by loss data enriches the means of fracture detection. Associated with other technology of fracture detection, it can provide important parameters for working fluids design of reservoir protection and dynamic analysis of oil-gas well. 利用漏失数据求取井底裂缝宽度,丰富了裂缝宽度的获得手段,可与其它裂缝探测技术一道为储层保护工作液设计和油气井动态分析提供重要参数。