石油学报 ›› 2008, Vol. 29 ›› Issue (5): 777-781.DOI: 10.7623/syxb200805028

• 石油工程 • 上一篇    下一篇

相控线阵技术在套管井声波测井地层信息测量中的应用

陈雪莲1,2, 许孝凯1,2   

  1. 1. 中国石油大学地球资源与信息学院, 山东东营, 257061;
    2. 中国石油天然气集团公司测井重点实验室华东研究室, 山东东营, 57061
  • 收稿日期:2007-10-07 修回日期:2007-12-26 出版日期:2008-09-25 发布日期:2010-05-21
  • 作者简介:陈雪莲,女,1976年2月生,2006年获中国石油大学(华东)博士学位.觋为中国石油大学(华东)讲师,主要从事声波测井方法及岩石物理的教学和科研工作.E-mail:chenxl@hdpu.edu.cn
  • 基金资助:
    国家自然科学基金项目(No.40574049);中国石油天然气集团公司创新基金项目(06E1020)联合资助

Application of linear phased-array technique to estimation of acoustic properties of formation in acoustic logging of cased hole

CHEN Xuelian1,2, XU Xiaokai1,2   

  1. 1. College of Geo-Resources and Information, China University of Petroleum, Dongying 257061, China;
    2. UPC Branch of CNPC Key Laboratory of Well Logging, Dongying 257061, China
  • Received:2007-10-07 Revised:2007-12-26 Online:2008-09-25 Published:2010-05-21

摘要: 将相控线阵技术引入到套管井声波测井中,对不同胶结状况下相控线阵声源激发的全波波形进行了数值计算。利用时间—慢度相关法对计算结果进行的分析表明:利用相控线阵声源作为发射器可以明显提高全波波形的信噪比。当Ⅰ、Ⅱ界面均胶结良好时,在满足地层滑行纵波同相位叠加的条件下,随着相控线阵声源阵元个数的增加,地层滑行纵波的幅度基本呈线性增加;在Ⅰ、Ⅱ界面胶结性较差时,相控声源与单个点声源相比,可大大增强地层波的能量,有利于在套管井中进行地层声学性质的可靠性测量。

关键词: 相控线阵技术, 套管井, 声波测井, 波形分析, 水泥胶结, 时间—慢度相关法

Abstract: The linear phased-array technique was introduced into cased hole acoustic logging.The synthesized full waveforms excited by the linear phased-array source were numerically simulated under the different bonded conditions.The numerical simulation results were analyzed by using the slowness-time coherence(STC) method.The analysis results show that the linear phased-array source can enhance clearly signal-to-noise ratio of the synthesized full waveforms.The amplitude of the refracting compressional wave increases linearly with increment of the element numbers of the linear phased-array source when the angle of radiated acoustic beam is close to the first critical angle in good bonded cased hole.The linear phased-array sources compared to one point source can greatly enhance the capacity of formation waves in bad bonded cased hole and has great importance on estimating acoustic velocity of formation.

Key words: linear phased-array technique, cased hole, acoustic logging, waveform processing, cementation, slowness-time coherence method(STC)

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