Based on Computational fluid dynamics （CFD）， the methane telemetry path under the condition of non-cooperative targets was analyzed. Combined with the one-dimensional line of sight integrated concentration characterization model， a numerical simulation study of methane emission under different wind speeds and different leakage locations was carried out to explore the change law of methane integrate concentration value under different scanning schemes， to obtain the optimal scheme for laser detection of oil and gas stations， and match the optical path with the actual detection path. The research results indicated that a scanning scheme with a horizontal distance of 5 m in the optical path could achieve rapid scanning and alarm of leaked gas in oil and gas field stations under different leakage locations and wind speed conditions. As the horizontal distance between the leak location and the detector increased， the wind speed increased. The scanning scheme with a horizontal distance of 5 m in the optical path had more obvious advantages in alarm time compared to other schemes.