延吉盆地油藏上的放射性异常特征

放射性测量在油藏上的异常特征反映了油藏储层的特征,所以通过放射性测量可以指示油藏的有利位置,为油气资源的勘探与评价提供信息.从延吉盆地进行的瞬时氡气测量、土壤天然热释光测量及伽马能谱测量的综合曲线出发,分析了油藏上、圈闭边缘及外侧的放射性异常特征,从而得出在油层上放时性异常特征为放射性低值,在圈闭边缘以外其放射性异常特征为放射性高值,并通过已知井进行了检正.由此提出可在构造圈闭的有利地段,利用简便的放射性综合测量对延吉盆地的勘探布钻进行指导,从而对延吉盆地的油气资源作出评价.

Radioactive anomaly character about Yanji Basin oil reservoir

The advantage point of oil reservoir can be located by rediometry, which provide information for exploring and estimating of oil and gas resource. The authors analyse the characters over the oil reservoir, fault fringe and outside of trap on the basis of instantaneous radon survey, soil natural themoluminescence survey and gamma spectrometry in Yanji Basin. It is concluded that the radioactive anomaly is high value over the oil reservoir and it is low value over the fault fringe and outside of oil trap. This result is testified by foregone drill. The authors also suggest that the simple and convenient radiometry be useful for determining the location of drilling in advantage location of fault trap on oil reservoir of Yanji Basin.