天然热释光技术在海洋油气田勘查中的应用

THE APPLICATION OF THERMOLUMINESCENCE TECHNIQUE TO THE OIL AND GAS EXPLORATION IN OCEANIC SURFACE SEDIMENTS

沉积物热释光能有效地反映海洋环境下深部油气田引起的微弱放射性异常。热释光在不同的测试粒级、不同的岩性中的丰度不同 ,结果为粗粒级 >细粒级、砂岩 >粉砂质砂岩 >泥质粉砂岩 >泥岩。热释光也与部分金属元素含量有关 ,Ti、Ba、Zn、Fe3+ /Fe2 + 与热释光呈正相关关系。热释光与烃类也呈较强的正相关性。不同采样深度热释光测量结果表明 ,热释光剂量随沉积物的沉积深度和沉积时间的增加而增加 。

In this paper,natural thermoluminescence(TL) is first applied to oil and gas exploration in surface sediments in East China Sea.Its mechanism has been described systematically.The results prove that TL is closely related to sediment grain sizes,composition and depth.Some metallic elements,such as Mn,Co and Ni have negative relationship,and Zn,Ba Ti have positive relationship with TL.Ethane(C 2H 4)also has positive relationship with TL.It has been proved that natural TL can be a useful index for petroleum exploration.