Pilot study of surface geochemical parameters to identify oil and gas potential at Langgu sunken in central Hebei depression, China

his paper discusses the significance of integrated parameters of surface oil and gas geochemical survey based on the vertical transportation theory and the influencing factors including geological structure, soil properties and others. A few integrated parameters of surface oil and gas survey surrounding some wells were calculated at Langgu depressed including MPV, MAV, Ai, Vi, total soil absorbed hydrocarbon and the concentration ratio of hydrocarbon to mercury. It was shown that oil wells, gas wells and low-production oil have different distribution zone on the plots composed of these parameters. So that the oil and gas potential of drilling well can be expected by surface geochemical survey.