浸液薄板中Lamb波的频散及衰减特性  

The Dispersion and Attenuation Characteristics of Lamb Wave in Immersed Plate

作　　者：路涛[1,2] 伍莹[1,2] 贺国芬[1,2] 马秀妮 宋永华[1,2] 

机构地区：[1]中国石油集团测井有限公司 [2]中国石油天然气集团公司测井重点实验室

出　　处：《国外测井技术》2015年第6期19-24,3,共6页World Well Logging Technology

基　　金：公司-轻质水泥固井质量测井关键技术研究;集团公司-测井重大技术现场试验与应用研究:"三维声波扫描成像测井仪器配套与应用研究"(2014D-41055)

摘　　要：油田固井施工中轻质水泥的应用越来越广泛,常规的固井质量测井方法已不能满足水泥胶结质量的评价需求。斯伦贝谢提出利用Lamb波衰减来评价轻质水泥固井质量的方法在现场应用中取得了较好效果,受到了广泛关注。本文从声波的基本控制方程出发,经过理论研究推导得到了自由板与浸液薄板中的Lamb波频散方程,研究分析了这些频散方程的数值解法,计算得到了Lamb波的频散曲线和衰减曲线并进行了分析。Low density cement has been widely used in oil well cementation and conventional cement bond logging can not meet the need of evaluating the cementing quality accurately.A new method introduced by Schlumberger that Lamb wave attenuation is used to evaluate the cementing quality of low density cement bonding has gained good result in practice and been paid attention to.From the basic sonic control equations,theoretical derivation achieves Lamb wave dispersion equations in free plate and immersed plate based on fundamental acoustic theory,then calculation and analysis is made to get the dispersion curves and attenuation curves.

关 键 词：轻质水泥 LAMB波 固井质量 频散 衰减 

分 类 号：TE151[石油与天然气工程—油气勘探]