Numerical simulation of geomechanical and filtration processes in a rock massif during the gas field development

1Bulat, AF, Krukovskiy, AP, Krukovska, VV, Bezruchko, KA
1M.S. Polyakov Institute of Geotechnical Mechanics of the NAS of Ukraine, Dnipropetrovsk
Dopov. Nac. akad. nauk Ukr. 2018, 9:28-34
Section: Mechanics
Language: Ukrainian

A mathematical model of the processes occurring during the gas field development is created. In it, the effect of a stressed state on the rock permeability and the effect of a gas pressure in the reservoir on the stress state of the massif are taken into account. Distributions of values of gas stresses, displacements, and the pressure in the reservoir at various time iterations are specified for a testing model of the gas field. Curves of Earth's surface displacement and changes of various geomechanical parameters are built. It is shown that a significant reduction of the gas pressure during the long-term field development causes deformations of the overlying rock massif. High variability of the stress field leads to an increased rock permeability near the reservoir bed, when hydrocarbon reserves are depleted.

Keywords: gas filtration, gas-field development, numerical simulation of coupled processes, rock massif deformation
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