碳氧比能谱测井在冀东油田的应用

Application of C/O Spectral Logging in Jidong Oilfield

以冀东油田为例,详细探讨碳氧比能谱测井资料的应用情况。碳氧比曲线能够定量预测厚油层顶部剩余油富集厚度,优化射孔方案;通过多井解释,预测油藏的平面剩余油富集区;依据碳氧比能谱测井曲线高氢硅比、高硅钙比、低碳氧比的特征定性识别评价储层大孔道;利用俘获伽马射线总谱与非弹性散射伽马总谱之比曲线(CI)的高值异常,结合油层含油饱和度,可以定性识别气层,监测油气动态;通过碳氧化测井曲线计算油层含油饱和度,识别出各时间点的油水界面,得到时间段内油水界面的上移高度,运用容积法原理计算油藏的地质储量。

C/O spectral logging curves contain rich stratigraphie information, and this logging method has been widely applied in the oilfield development in recent years. We detail several log application examples and the effect of C/O spectral logging data in oil reservoir development in Jidong oilfield. We can quantitatively predict the concentrated thickness of remaining oil on the top of oil-reservoir and optimize the perforation project with C/O spectral logging curves. We can predict enrichment region of remaining oil with the multi-well explanations and qualitatively identify and evaluate high capacity channel of reservoir by the feature of high H/Si, Si/Ca and C/O ratio. We can qualitatively recognize gas bearing formation and monitor the performance of hydrocarbon through the abnormal high-value of CI and oil saturation. We can calculate the oil saturation of oil layer by C/O spectral logging curves, identify the interface of oil and water at different time points and obtain the interface migration height in each time interval, and calculate the geological reserves of oil layer with volumetric method theory.