油气田的具体地质和地球化学条件导致在油气储边缘的油(气)水界面附近形成氦与镭(氡)富集。上升的地下水流使上述元素的富集可能反映到近地表部位,呈环状分布于油气储边缘。在油气储正上方则显示这些元素的低场区,这是可能应用核技术勘查油气田的基础。我国和国外在油气田上的实测结果证实了上述论断。 The specific geologic and geochemical conditions of oil and gas fields lead to the formation of helium and radium (Radon) enrichment near the oil (gas) water interface at the reservoir margin. The rising groundwater flow makes the enrichment of the above elements likely to be reflected in the near-surface area and is distributed annularly at the edge of the oil and gas reservoirs. Above the reservoir, the lower field of these elements is displayed, which is the basis for the possible application of nuclear techniques in the exploration of oil and gas fields. The measured results on oil and gas fields in China and abroad confirm the above conclusion.