油气运移的室内模拟与热释光响应

热释光油气勘查理论认为,油气藏上方放射性异常区域的形成与油气运移有关。通过地表砂土的热释光测量,可以有效地发现这种微弱的放射性异常区,继而找到与之对应的地下油气藏。为了进一步证明该理论的可靠性,特设计了一个室内模拟实验。实验结果表明:1)油气运移可以在常温、常压条件下通过气态扩散方式进行;2)样品油也有热释光信号产生;3)油气产生的热释光信号在扩散层顶部增强。 

INDOOR SIMULATION AND THERMOLUMINESCENCE RESPONSE OF HYDROCARBON MIGRATION

Based on the theory of hydrocarbon exploration by thermoluminescence (TL), it was considered that the formation of radioactivity abnormal areas over oil and gas pools was related to hydrocarbon migration. By thermoluminescence determination on ground sandy soil, this kind of abnormal areas with weak radioactivity can be effectively discovered, and the corresponding underground oil and gas pools can then be found. In order to further prove the reliability of the theory, an indoor simulation experiment was designed especially. The results revealed that 1)hydrocarbon migration can be going on under the condition of normal temperature and pressure by means of gaseous diffusion, 2)sample oil also generated thermoluminescence signals, and 3)the thermoluminescence signals generated from hydrocarbon were enhanced on the top of diffusion layers.