论文标题
井眼声音全波倒置
Borehole acoustic full-waveform inversion
论文作者
论文摘要
全波形反演（FWI）是一种具有建立高分辨率弹性速度模型的技术。我们提议将此技术应用于有线单极的声学记录数据，以获得近乎井眼的形成速度结构，该结构可用于井眼损伤或流体入侵评估。提出了使用单极声学记录数据的2D FWI。 FWI以圆柱坐标而不是笛卡尔坐标建立，以适应钻孔的几何形状。预处理设计用于抑制反转中强钻孔引导波的影响。合成测试表明，使用所提出的方法可以将井眼周围的高分子弹性速度曲线倒置与单极声学记录数据倒置。
Full-waveform inversion (FWI) is a technique having the potential for building high-resolution elastic velocity models. We proposed to apply this technique to wireline monopole acoustic logging data to obtain the near wellbore formation velocity structures, which can be used in wellbore damage or fluid intrusion evaluation. A 2D FWI using monopole acoustic logging data is presented. The FWI is established in cylindrical coordinates instead of Cartesian coordinates in order to adapt to the borehole geometry. A preconditioner is designed for suppressing the influence of the strong borehole guided waves in the inversion. Synthetic tests demonstrate that high-resoultion elastic velocity profile around borehole can be inverted from monopole acoustic logging data by using the proposed method.
