定量荧光录井技术在油气层划分中的应用

APPLICATION OF QUANTITATIVE FLUOROLOGGING TECHNIQUE TO STRATIGRAPHIC DIVISION OF RESERVOIRS

普通荧光录井技术人为主观误差较大,易漏失煤成油、凝析油等油气显示,易被外来油品污染所影响,故正逐渐被能够自动化定量分析、具有差谱扣除技术以及快速分析和快速评价特点的定量荧光录井技术所取代。为此,探讨了定量荧光录井技术在油气层划分中的应用,并通过对石油荧光定量分析仪的仪器灵敏度性能、重复性情况和仪器线性情况做了三类试验来检验,验证效果良好。采用二次分析方法,求取了孔渗性指数、油气损失恢复系数、油性指数,并据此确定出了油性判别、含油储层性质判别、含油级别划分的标准。应用于某预探井的实践证明,定量荧光录井技术在含油储层评价中发挥了重要作用。

The conventional fluorologging technique has relatively large subjective errors, cannot readily recognize shows of coal-derived oil and condensate oil, and often influenced easily by the introduced oil products. It is progressively replaced by quantitative fluorologging technique characterized by automatic quantitative analysis, capability of difference spectrometry deduction, and rapid analysis and evaluation. This paper discusses the application of quantitative fluorologging technique to division of oil and gas layers. Tests are performed on the sensitivity, repeatability and linearity of the oil fluorescence quantitative analyzer and the results are satisfactory. Quadratic analysis method is used to acquire Ic, K and Oc, which are to be used as the criteria for determination of oil-bearing property, oil-bearing reservoir quality and oil-bearing grades. Through its application to an exploratory well, this technique was proved to play a very important role in reservoir evaluation.