During its migration towards the surface in the forms of microbubble, water power, diffusion and filtration, the effects and styles of hydrocarbon are closely related to such geological factors as the cover of the oil and gas accumulation, fault and fissure system, nature of fluids in the reservoir and pressure of the strata. Based on an integrated analysis of geochemical and geological data from the surface and the boreholes of the Yakela gas condensate field in Tarim basin, the authors hold that there exist fine internal relations between borehole vertical geochemical characteristics of this gas field, geological factors controlling vertical percolation of hydrocarbon and surface geochemical anomalies.