斯通利波和弯曲波联合反演地层VTI各向异性的阵列声波处理方法

利用声波测井获取地层各向异性已成为储层油气评价的一项重要的课题.本文提出了一种单极和偶极振型联合反演地层各向异性的阵列声波处理方法，采用VTI（vertical transversely isotropic）介质斯通利波和弯曲波频散特征，分频段联合求取各向同性面内剪切模量，反演精度相比于传统方法得到了提高；研究了一种同时适用于单极和偶极声波测井的仪器标定方法，消除了仪器对井孔声传播的影响.通过对数值模拟数据的处理和现场测井数据的应用，验证了新方法的正确性和有效性.本文工作为利用阵列声波测井资料评价横观各向同性地层中横波速度的各向异性提供了有效的处理方法.

Determining formation shear wave transverse isotropy jointly from borehole Stoneley-and flexural-wave data

It has been playing an increasing important role in the exploration and production of shale resources that how to evaluate seismic wave anisotropy using borehole measurements. We have developed a joint inversion method for multipole acoustic data processing to simultaneously determine formation shear wave transverse isotropy and vertical shear wave velocity (or C₄₄ and C₆₆). By jointly combining the Stoneley and flexural wave dispersion data of different frequency band, we finally improve accuracy of the inversion. Meanwhile, this study presents a multipole calibrating method of the tool compliance to eliminate the influence of acoustic logging tool. Further, the new technique was tested on synthetic waveform data and the field acoustic logging data. This study presents an effective technology for obtaining formation shear wave anisotropy.