BGO碳氧比能谱测井定量解释方法

文中提出了３种利用ＢＧＯ碳氧比能谱测井定量求含油饱和度的解释方法，同时给经们各自的应用条件。将获得的解释方法应用于大庆１口密闭取心井的解释中，经比较得出，象大庆油田这样Ｃａ含量≤１０％的储集层，用理论推导结合模拟地层刻度建立解释公式效果最好，若以实验室分析的含油饱和度为标准，碳氧比所求含油饱和度的平均绝对误差〈９％。该方法在大庆采油五厂和采油十厂的实际应用中取得了显著效果。

The Quantitative Interpretation Method for Carbon Oxygen Spectral Logging with BGO Detector

Three kinds of quantitative interpretation methods for obtaining oil saturation from C/O spectral logging with GBO detector and their corresponding applicable conditions are proposed herein. The results obtained from a sealing core well in Daqing Oilfield using the above metioned methods show that reservoirs with the content of calcium not more than 10%, such as those in Daqing Oilfield, can be interpreted effectively through the interpretation formula established by the combination of theoretical derivation and calibration in test pit. If oil saturation from core analysis is regarded as criterion, the mean absolute error of oil saturation from C/O data is less than 9%. The application results of the method in Production Plants 5 and 10 in Daqing are good.