基于阵列声波测井的套管井纵波时差获取方法  

Method to Obtain Compressional Wave Slowness in Cased Hole Based on Array Acoustic Logging

作　　者：崔丽香 陈彦竹 杨双定 谢刚 CUI Lixiang;CHEN Yanzhu;YANG Shuangding;XIE Gang(China Petroleum Logging CO.LTD.,Xi’an,Shaanxi 710077,China)

机构地区：[1]中国石油集团测井有限公司,陕西西安710077

出　　处：《测井技术》2018年第2期163-168,共6页Well Logging Technology

摘　　要：分析套管井阵列声波测井提取纵波、横波的影响因素,纵波时差受套管尺寸、固井质量、扩径、地层性质影响。固井质量是主要影响因素。在固井质量较好的情况下,阵列声波测井提取纵波可以不作校正;对于套管井固井质量不好的情况,阵列声波测井提取纵波已经不能反映实际地层的纵波信息,需要进行校正。采用横波反演方法,应用鄂尔多斯盆地5个区块共34口井的阵列声波测井资料,回归得出具有地区经验的纵波时差重构方程,通过实例对比分析验证了该方法的可行性和实用性。The factors affecting the extraction of P-wave and S-wave from through-casing array acoustic logging data are analyzed.The interval travel time of P-wave is affected by casing size,cement ring cementation,borehole enlargement and formation properties.Cementing quality is the main influencing factors.In the case of better cementing quality,the extracted P-wave by array acoustic logging needn’t to be corrected;For the bad cementing quality,the extracted P-wave by array acoustic logging can not reflect the P-wave information of actual formation,so it is necessary to make correction.By using shear wave inversion,a reconstruction method of compressional wave slowness is presented,regression equations of P-wave slowness reconstruction are established in five blocks,Ordos Basin.The verification and analysis of acoustic logging data of 34 wells shows the method is feasibility and practicability.

关 键 词：阵列声波测井 套管井 纵波提取 时差重构 鄂尔多斯盆地 

分 类 号：P631.84[天文地球—地质矿产勘探]