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Petrophysical thermobaric model of the Eearth’s crust of the Black sea North-Western part along a 25 DSS profile
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 15th EAGE International Conference on Geoinformatics - Theoretical and Applied Aspects, May 2016, Volume 2016, p.1 - 5
Abstract
Summary
The new hypothesis of education, existence and disappearance of low velocity zones (LVZ), discovered the DSS method as elastic anomalies of the Earth’s crust is presented in the article. The difficult changes of VP,S=f(PT) for rocks are experimentally set up (regions of velocity inversion are revealed). Zones arise in cases, when at corresponding depths, the temperature gradient exceeds the certain threshold, and the pressure cannot compensate the disturbance of rocks caused by temperature actions. The presence of low velocity zones is the objective reality and they can be everywhere in the Earth’s crust. Their power can be increased with the increase of intensity of thermal regimes or it will disappear with lowering of heat in a lithosphere. In the offered work on the basis of study of connection of interstitial space with the longitudinal waves propagation velocity at high pressures and temperatures in the Ukrainian shield granites samples an attempt more fully to describe a change porosity and fractures of rocks depending on P and Т influence of different depths is carried out, to explain some crust anomalies of rocks unpacking, which can be conductors of migration and localization of deep origin hydrocarbons.
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