摘要
为了确定在何种固井质量条件下,才能获得真正可靠的套后阵列声波测井资料,应用交会图技术对比分析了固井质量对套后阵列声波测量的影响,总结了7种套后阵列声波模式。固井质量优和中等的情况下可获得优等的套后阵列声波数据;对于存在微环的假象差固井层段,套后阵列声波仍可获得地层的纵横波信息。固井质量差的层段,套后偶极阵列声波可获得横波信息,但无法获得纵波信息。分析表明:横波时差的提取受固井质量影响较小,固井质量差的层段对纵波时差的提取影响较大,应用多元回归的方法预测纵波时差,能获得可靠的纵波信息。
In order to determine in which kind of cementing quality,that we can obtain reliable acoustic logging data,the cross-plot technique is used to compare and analyze the influence of cementing quality on the array acoustic logging after casing.Seven post-casing array acoustic wave modes are summarized.The excellent post-casing array acoustic wave data can be obtained under the conditions of excellent and medium cementing quality.For the pseudo-heterodyne cementing interval with micro-rings,the P-wave and S-wave information of the formation can still be obtained by the array acoustic wave after casing.In the layer with poor cementing quality,the shear wave information can be obtained by dipole array acoustic wave after casing,but the compression wave information cannot be obtained.The analysis shows that the extraction of shear wave time difference is less affected by cementing quality,and the interval with poor cementing quality has a great influence on compression wave information,the reliable compression wave information can be obtained by multiple regression method to predict the compression wave time difference.
作者
李铁柱
郭海峰
倪国辉
黄登峰
吴志伟
孙利国
LI Tiezhu;GUO Haifeng;NI Guohui;HUANG Dengfeng;WU Zhiwei;SUN Liguo(International Branch,China National Logging Corporation,Beijing 100101,China)
出处
《测井技术》
CAS
2022年第4期493-499,共7页
Well Logging Technology
关键词
测井解释
套后阵列声波测井
固井质量
交会图技术
影响分析
log interpretation
array acoustic logging after casing
cementing quality
crossplot technique
analysis influence
