Abstract
Elastic wave velocity and their gradient fields are used to study heterogeneous geological media. Materials describing the separation of the lithological and structural-tectonic features of the medium using the modulus of the true velocity gradient vector and its angle in the plane of the seismic section are presented. In this case, the value of |grad V(x, z)| is due to changes in the lithological composition of rocks in the studied medium, and the angular function θ(x, z) is related to the structural features of the section (the geometry of the medium). The chapter describes the features of the methodology for constructing velocity fields and their gradients based on the use of data from the velocity analysis of seismograms, and presents the results obtained on one of the CDP seismic profiles. The developed methodology for studying the velocity fields and velocity gradients of seismic waves allows us to extract specific quantitative information about the section from the CDP materials in a convenient and easily interpreted form. Based on the use of this technique, it is shown that it is possible to identify local inhomogeneities of the real geoenvironment associated with horizontal lithology variability and tectonic disturbances.
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Trofimov, V.L., Khaziev, F.F., Trofimova, A.V. (2022). Elastic Wave Velocity and Velocity Gradient Fields for Heterogeneous Geological Media. In: Oil and Gas Reservoir Prospecting and Exploration. Springer, Cham. https://doi.org/10.1007/978-3-030-84389-2_6
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