Fracture characterization is of extreme importance in seismic exploration. Owing to weak azimuthal variation of the P-wave amplitude induced by fractures, it is difficult to stably and concisely predict fracture distribution from seismic data with low signal to noise ratio in complexly anisotropic media. This paper derives the azimuthal elastic impedance (AEI) equation in terms of the truncated Fourier series and utilizes Karhunen-Loève (K-L) transformation to analyze the azimuthal variation of the P-wave amplitude. And then the innovative AEI equation incorporating the prior fracture orientation and 2-term Fourier series is proposed to iteratively estimate fracture orientation without 90° uncertainty and the anisotropic gradient of the AEI indicating fracture density. Finally, the field data are carried out to confirm the effectivity and robustness of the above method.
Presentation Date: Wednesday, September 18, 2019
Session Start Time: 1:50 PM
Presentation Time: 3:30 PM
Location: 221B
Presentation Type: Oral
