Stress-induced seismic anisotropy is usually difficult to be separated or decoupled from
intrinsic or fracture-induced anisotropy in the subsurface. To distinguish the effects of …

Shales represent strongly intrinsic vertical transverse isotropy (VTI) property or polar
anisotropy. The presence of vertically aligned fractures makes shale exhibit orthogonal …

Unconventional reservoirs usually have strong anisotropy. Generally, they can be regarded
as transversely isotropic media with a vertical symmetry axis [(VTI) media] in the absence of …

Horizontal layered formations with a suite of vertical or near-vertical fractures are usually
assumed to be an approximate orthotropic medium and are more suitable for estimating f …

Horizontally and vertically aligned fractures (joints) permeated in an isotropic background
can give rise to a long-wavelength equivalent orthorhombic medium, which is common for …

Prediction of fluid-saturated fractures is crucial for characterizing tight hydrocarbon
reservoirs. Elastic amplitude variation versus azimuth (AVAz) methods are commonly …

In VTI media, the conventional inversion methods based on the existing approximation
formulas are difficult to accurately estimate the anisotropic parameters of reservoirs, even …

Based on the long-wavelength approximation, a set of parallel vertical fractures embedded
in periodic thin interbeds can be regarded as an equivalent orthorhombic medium. Rock …

Seismic amplitude variation with offset and azimuth (AVOaz) inversion is well known as a
popular and pragmatic tool utilized to estimate fracture parameters. A single set of vertical …

Quantitative inversion of fracture weakness plays an important role in fracture prediction.
Considering reservoirs with a set of vertical fractures as horizontal transversely isotropic …