Leaky modes and the first arrivals in cased boreholes with poorly bonded conditions

• 作 者: XiuMei Zhang XiuMing Wang HaiL
• 机 构: StateKeyLaboratoryofAcoustics
• 出 处: 中国科学：物理学、力学、天文学英文版
• 发表日期: 2016年2期
• 关键词: 泄漏模式 套管井 速度频散 测井评价方法 激发光谱 频率范围 曲面结构 特征函数 leaky modes cased borehole dispersion
• 基金项目: This work was supported by the National Natural Science Foundation of China （Grant Nos. 11134011 and 41274134）.

The generation mechanism of the first arrivals in the cased boreholes for the poorly bonded conditions is investigated. Based on the analyses of the Riemann surface structure of the characteristic function, the dispersion features, excitation spectra and