热释光油气勘查的机理模型与实验  

A model and experiment about oil petroleum with thermoluminescence

作　　者：郑公望[1] 王翌[1] 王辉[1] 田昭舆[1] 

机构地区：[1]北京大学城市与环境学院地表过程分析与模拟教育部重点实验室,北京100871

出　　处：《核技术》2007年第11期943-946,共4页Nuclear Techniques

基　　金：国家自然科学基金(40472072)资助

摘　　要：多年放射性油气勘查工作研究发现,多数油气藏上方存在放射性异常区。但是,油气藏与其上方放射性异常区是否存在必然联系尚无定论。本文就地表砂土热释光勘查油气藏的机理模型,进行了室内微缩模拟实验,试图证明油气迁移可以引起其上方地层中放射性元素的重新分布与富集。实验中排除了环境辐射差异、地下水活动、地形变化、土质不同等带来的干扰,观察到油气藏上方土层中放射性元素重新分布的迹象。结合前期研究工作可以认为,"油气迁移引起上覆地层中放射性元素重新分布"的假设成立,为研究地表热释光油气勘查方法提供了进一步的理论和事实依据。Many years＇oil and gas exploration with radioactivity indicates that there is anomalous radioactivity in the sediments mantling oil deposits. However, it has not been clear that there is a relationship between the anomalous radioactivity and the oil deposits. In this paper, in order to test the effect of the migration of oil and gas on the redistribution and enrichment of radio elements in the sediments covering on oil deposits, indoor simulating experiments on the mechanism of oil and gas exploration with thermoluminescence in superficial sediments were carded out. In the experiments, the redistribution of the elements in the superficial sediments of oil and gas deposits has been observed after excluding the factors of the difference in environmental irradiation, the motion of groundwater, landscape change and the difference in sediment. Based on previous work, the experimental results show that the assumption, ＂The migration of oil and gas causes radio elements in overlying sediments to redistribute＂, is right. This provides theoretical and experimental basis for the method of the oil and gas exploration with thermoluminescence of superficial sediments.

关 键 词：热释光 油气勘查 核辐射 

分 类 号：TL816.7[核科学技术—核技术及应用]