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第 39 卷 第 1 期                                                                       Vol. 39, No. 1
             2020 年 1 月                          Journal of Applied Acoustics                   January, 2020

             ⋄“全国储层声学与深部钻测技术前沿研讨会”举办十周年 ⋄


                                    套管中模式波的响应特征                                     ∗






                                             陈雪莲      †   唐晓明 刘临政


                                         (中国石油大学 (华东) 地球科学与技术学院         青岛  266580)

                摘要：在固井质量评价中主要利用套管中模式波的幅度或衰减变化反映水泥的胶结状况，不同测井仪器在套
                管中激发的模式波的类型不同，研究套管中各模式波的传播特征和影响因素可充分挖掘测量数据的潜在应用
                价值。CBL 和 SBT 等测井仪器在套管中主要激发拉伸波，类同于平板中的零阶对称 Lamb 波，水泥环封隔测
                井仪器的斜入射模式在套管中主要激发套管弯曲波，类同于平板中的零阶反对称 Lamb 波，垂直入射模式激发
                套管共振波，类同于平板中的高阶对称 Lamb 波。该文重点分析了这些模式波的衰减特征及其对微环的响应，
                套管弯曲波在套后耦合轻质水泥时对微环不敏感，但在套后耦合常规水泥或重水泥时，其衰减明显高于胶结
                良好的状况；拉伸波对微环的存在最为敏感；套管共振波对微环不敏感。
                关键词：水泥胶结；套管井；拉伸波；弯曲波
                中图法分类号: TE19           文献标识码: A          文章编号: 1000-310X(2020)01-0002-07
                DOI: 10.11684/j.issn.1000-310X.2020.01.001


                           Response characteristics of the model waves in the casing



                                      CHEN Xuelian TANG Xiaoming LIU Linzheng


                          (School of Geosciences & Technology, China University of Petroleum, Qingdao 266580, China)

                 Abstract: The amplitude or attenuation variation of the guided waves in the casing is mainly used to evaluate
                 the cement bonding quality. The types of the guided waves excited by different logging tools may be different.
                 Studying the propagation characteristics and influencing factors of the guided waves in the casing can fully
                 explore the potential applications of measurement data. CBL and SBT logging instrument can generate the
                 longitudinal wave in the casing, which is analogous to the zero order symmetric Lamb waves in the plate.
                 The pitch-catch pattern of IBC tool with oblique incidence can stimulate flexural wave in the casing, which
                 is analogous to the zero order anti-symmetric Lamb wave in the plate. The ultrasonic reflection pattern with
                 vertical incidence can excite the casing resonance waves, which is analogous to the high order symmetric Lamb
                 waves in the plate. This paper focuses on analyzing the attenuation characteristics of these mode waves and
                 their response characteristics with micro-annulus model. The flexural wave is not sensitive to micro-annulus
                 when the light cement is bonded behind casing. On the contrary, the flexural wave is sensitive to micro-annulus
                 when the regular cement is bonded behind casing. The longitudinal wave is very sensitive to the presence of
                 micro-annulus. Casing resonance waves are insensitive to micro-annulus.
                 Keywords: Cement bonding; Cased well; Longitudinal wave; Flexural wave



             2019-07-26 收稿; 2019-10-24 定稿
             国家自然科学基金项目 (41774141)
             ∗
             作者简介: 陈雪莲 (1976– ), 女, 河北衡水人, 博士, 副教授, 研究方向: 声波测井方法及岩石物理。
             † 通信作者 E-mail: chenxl@upc.edu.cn
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