Waves 9 full crak4/1/2024 ε dominates the near-horizontal wave propagation and δ controls the influence of anisotropy on near-vertically travelling P-waves, while γ governs the fractional difference between the velocities of split shear waves at vertical incidence. Reflection seismic signatures in anisotropic media are most concisely described by Thomsen's parameters, such as the parameters ε, δ and γ for transverse isotropy with a vertical symmetry-axis (VTI) media (Thomsen 1986, 1988). Thomsen ( 1986, 1988) developed parameters as a description of anisotropy in TI media. There are different effective models of cracked media which correspond to different theories of seismic wave propagation in transversely isotropic (TI) media (e.g. The study of crack properties is of great significance to the evaluation and prediction of reservoirs, and it also meets an urgent need for the effective development of oil fields. Cracks have powerful reservoir properties and seepage capability, and they always serve as the main migration channel and storage space for nearby hydrocarbons. With the development and utilization of oil and gas resources, the direction of petroleum exploration is gradually shifting from conventional hydrocarbon reservoirs to special hydrocarbon reservoirs. ![]() ![]() AVA, HTI medium, fracture density, convex quadratic function, conjugate gradient methods 1.
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