关键词: 氡, 油水边界, 油藏类型, 评价, 预测, 应用

Abstract: The method of measuring radioactive radon in the soil is simple,economic and effective.It can define the range of oil field through finding the transitional belt of oil and water underground.The mech chanism is that the natural γ goes from strengh to weakness from oil layer to the earth's surface in vertical section,and the natural γ goes strong in the border and weak above the oil layer in different oil layers in plane.Experiments show that whether structural reservoir or lithologic reservoir or other kind of reservoir,the existing of abnormal radon is clear.Using this method evaluate sand boby,the result not only tallied with test well information,but also the two affirmed and negated test wells have been confirmed by drilling in later period.The prediction to a certain structure in new region has been verified.Defined borders in rolling developed area coincide with reality of production.This method can provide new developed well location for extending border in old region.

Key words: radon, oil-water boundary, reservoir type, evaluation, predict, application