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- Title
Modeling the thermohydrogeochemical conditions for the generation of productive reservoirs in volcanogenic rocks.
- Authors
Kiryukhin, A.; Shadrina, S.; Puzankov, M.
- Abstract
This paper considers the role of hydrothermal processes in the generation of porous and permeable reservoirs in volcanogenic rocks, their boundedness with low-permeability interfaces, and the accumulation of fluids of various origins and phase states in the reservoirs. The Rogozhnikovskii productive reservoir is an example of a volcanogenic oil reservoir in western Siberia, it is confined to fluid upflows that are marked by positive anomalies in temperature and pressure. The Mutnovskii productive reservoir is an example of a high-temperature two-phase (water + steam) reservoir in Kamchatka that is supplied with deep heat-carrier upflows that are also associated with positive anomalies in temperature and pressure. The iTOUGH2 inversion simulation is used to estimate the discharge of deep upflows and then to represent a possible mechanism for the evolution of permeability-porosity and self-sealing of such reservoirs that result from water-rock chemical interaction. These methods are applied to the Rogozhnikovskii and Mutnovskii reservoirs. Both of these scenarios demonstrate the possible generation of productive reservoirs by hydrothermal circulation and show a short-lived drop in pressure during the earlier phase (which favors the inflow of fluids into the reservoir) and self-sealing with low-permeability interfaces during the later phase of hydrothermal circulation (which favors long-term storage of fluids in reservoirs).
- Subjects
GEOLOGICAL modeling; WATER chemistry; RESERVOIRS; VOLCANOLOGY; ROCKS; POROUS materials; HYDROTHERMAL circulation (Oceanography); TEMPERATURE effect
- Publication
Journal of Volcanology & Seismology, 2013, Vol 7, Issue 2, p170
- ISSN
0742-0463
- Publication type
Article
- DOI
10.1134/S0742046313020036