物探化探计算技术2025，Vol.47Issue(5)：742-750,9.DOI:10.12474/wthtjs.20240527-0001
Phase-Moveout频散分析校正方法及岩石物理应用
Phase-Moveout dispersion analysis and correction method of S-wave and its application in rock physics
摘要
Abstract
Slow formation exists in the middle and deep water reservoirs in the eastern South China Sea,and the bending waves stimulated by even order sub-sound sources are easily dispersed.The traditional slower-time correlation method(STC)can not reflect the real formation information.To solve this problem,taking Baiyun-Liwan Sag of Pearl River Mouth Basin as an example,based on the array acoustic data,Fourier transform was used to phase unroll the dipole s-wave waveform to obtain the parcel phase information,and then the parcel phase information was expanded twice to get the accurate phase distribution,eliminate the phase jump,and establish the linear relationship between the phase value and the number of receivers n.The slope and acoustic slowness wave S are used to construct the dispersion curve to calculate the actual slowness of the formation,namely,the Phase-Moveout dispersion analysis method.The results show that,compared with the traditional weighted spectral coherence method(WSS)and amplitude Phase estimation method(APES),the phase-Moveout dispersion correction method is not affected by false frequency and noise,and the calculation speed is faster,the accuracy is higher,and the applicability is broader.According to quantitative rock physical quantity plate(RPT)analysis,the corrected dipole shear waves are more consistent with formation characteristics.The research results can enhance the reliability of seismic interpretation conclusions,improve the accuracy of reservoir evaluation,and provide a technical basis for the effective development of the middle and deep water reservoirs in the eastern South China Sea.关键词
偶极子声波测井/频散分析/横波波速/频散校正/傅里叶变换Key words
dipole acoustic logging/dispersion analysis/shear wave velocity/dispersion correction/fourier transform分类
能源科技引用本文复制引用
丛平,张传举,王显南,张伟,苏雨欣..Phase-Moveout频散分析校正方法及岩石物理应用[J].物探化探计算技术,2025,47(5):742-750,9.基金项目
国家自然科学基金项目(42274141) （42274141）
