oa Modeling the Increase in Gas Yield of an Anisotropic Reservoir

On the base of combined finite element - difference method, we carried out computer modeling of the gas recovery increasing process between producing wells in anisotropic low permeable gas reservoirs. The modeling results show that the growth of reservoir’s gas recovery between production wells and, accordingly, the increase of gas production significantly depends on their location, both in the shear-isotropic, so in the shear-anisotropic gas-bearing weakly permeable reservoirs. Based on the obtained results, for the effective using of the weakly permeable anisotropic gas-bearing reservoirs, it is necessary to install production wells along the main axes of anisotropy of the reservoir, because it improves the direct exchange between wells and filtration flows. We have defined, at the installation systems of production wells in the weakly permeable anisotropic reservoirs, gas production will be most effective when the strip of wells has freer access to the direction of increased permeability of the gas phase. We also have shown that with the cross-shaped arrangement of the production wells relatively the main axes of anisotropy, the gas exchange between the production wells is the largest for all cases of the anisotropy, so such installation of production wells will be the optimal.