The formation of volcanogenic reservoir by hydrothermal fluid

Key words: volcanic rocks. hydrothermal processes, postprimary changes, reservoir features.

The staging process of changing for volcanic rocks by hydrothermal fluids and their influence to pertophysical properties of volcanites as porosity, permeability, wettability was investigated. The results point to hardening rocks and some reduction of porosity and permeability during high-temperature stage. The influence of middle-temperature fluid depends on texture-structure rock features. Low-temperature processes make worse any filtration characteristics.

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