For transversely isotropic media with a horizontal axis of symmetry (HTI), the P-wave azimuth anisotropy can be used to effectively predict subsurface fractures. In this paper, the P-wave reflection coefficient approximate formula including P-wave impedance and S-wave impedance and fracture weaknesses was derived. Compared to directly performing four-parameter inversion, this paper proposed a indirect inversion method that we first invert P-wave impedance and S-wave impedance, and then eliminate the influence of the isotropic background reflection and used the difference between the two azimuth seismic data to perform the inversion of fracture weaknesses separately. This method effectively reduces the condition number of the kernel function matrix in the inversion process and makes the inversion more stable. The tests on single well demonstrate that in the case of seismic data with poor signal-to-noise ratio, this inversion method could help reduce the uncertainty for the estimation of P-wave impedance and S-wave impedance and fracture weaknesses.
Presentation Date: Tuesday, October 16, 2018
Start Time: 1:50:00 PM
Location: 206A (Anaheim Convention Center)
Presentation Type: Oral