地化气测录井资料在油水层识别中的应用

Applying Data of Geochemical and Gas Logging to Pay Bed Identification

低电阻率油层因其储层电阻率偏低,油层测井响应特征不明显,利用常规方法进行油水层识别难度较大。地球化学分析技术可以直接分析储层样品所含流体的特征。以济阳坳陷第三系陆相储层低电阻率油层为例,介绍了用地化热裂解、色谱及热解色谱地球化学分析和气测录井得到的资料在油水层识别中的应用。在低电阻率油层的实际评价中取得了较好的效果。

When conventional log responses in low-resitivity pay beds are difficult to distinguish oil and water layers, and while the distinguishing capability of geochemical parameters is better than that of electrical, the geochemical analysis technique might become another alternative to answer the difficulty. With some examples of low-resistivity pay beds in tertiary continental reservoirs in Jiyang depression, this paper introduces applications of information collected with geochemical analysis technique, including cracking analysis and chromatography/cracking-chromatography as well as gas logging, to distinguish oil and water formations, and their practical effects in evaluating low-resistivity pay beds.