In this study, by analyzing CH₄ concentration and δ¹³C_CH4 in soil-gas profiles, the potentials of CH₄ gas transfer from ground to atmosphere were studied at four representative sectors in the Yakela condensed gas field in the Tarim Basin, Xinjiang, China. These are: 1) the oil–gas interface sector, 2) fault sector, 3) oil–water interface sector, 4) an external area. Variation in CH₄ in soil-gas profiles showed that CH₄ microseepage resulted from the migration of subsurface hydrocarbon from deep-buried reservoirs to the earth’s surface. It was found that CH₄ from deep-buried reservoirs could migrate upwards to the surface through faults, fissures and permeable rocks, during which some CH₄ was oxidized and the unoxidized methane remained in the soil or was emitted into the atmosphere. The lowest level of CH₄ at the soil-gas profile was found at the CH₄ gas-phase equilibrium point at which the CH₄ migration upwards from deep-buried reservoirs and the CH₄ diffusion downwards from the atmosphere met. The δ¹³C_CH4 and ethane, propane in soil gas exhibited thermogenic characteristics, suggesting the occurrence of CH₄ microseepage from deep-buried reservoirs. A linear correlation analysis between CH₄ concentrations in soil gas and temperature, moisture, pH, Eh, Ec and particle size of soil indicated that both soil Eh and soil temperature could affect CH₄ concentration in soil gas while soil pH could indirectly influence soil methanotrophic oxidation via impacting soil Eh.