Geomechanical factor of the intake of additional capacities of free methane at the exploitation of gas deposits

TitleGeomechanical factor of the intake of additional capacities of free methane at the exploitation of gas deposits
Publication TypeJournal Article
Year of Publication2018
AuthorsBulat, AF, Lukinov, VV, Bezruchko, KA, Krukovskyi, OP, Krukovska, VV
Abbreviated Key TitleDopov. Nac. akad. nauk Ukr.
Date Published8/2018

The hypothesis of forming a fracture-porous structure of secondary rocks on the gas-deposit development as a result of a decrease of the gas pressure and the development of compression deformations in a productive re- servoir, which stipulate deformations of tension in a low-porous reservoir, assisting the redistribution of water and the gas, and forming the technogenic reservoir in it, is proposed. A mathematical model for the simulation of processes occurring at the development of a gas deposit is developed. The numerical simulation of changes of geomechanical and filtration parameters for the test model of a gas deposit is executed. It is shown that the con- siderable decrease of the gas pressure at the long-term exploitation of a deposit stipulates the deformation of higher- and underlying rock strata. The enhanced variability of the stress field creates an increase in the permeability near-by a layer-reservoir at the reserve depletion of hydrocarbons. If there is a low-porous reservoir in the area of enhanced variability, its gas recovery will grow, being conditioned by an increase in the permeability.

Keywordsgas deposits, gas filtration, geological and geomechanical processes, numerical simulation, rock massif deformation
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