碳氧比能谱测井数据预处理技术

Preprocessing Technique of C/O Logging Data.

在测井过程中由于温度和仪器稳定性等因素的影响，使地层谱漂移。依据碳氧比能谱测井仪测量的地层谱特征，给出了地层谱漂移校正技术。为了剔除曲线中存在的异常数据，给出了一种异常数据检测和剔除方法并用内插值予以填补。最后为了降低曲线的统计噪声，给出了一种简单适用的自适应滤波技术。经过实际应用，证明本文提出的碳氧比能谱测井数据预处理技术提高了曲线的质量，同时也提高了解释的地层含油饱和度的精度。

This paper presents a formation spectrum correction technique for spectral migration caused by the effect of temperature and tool drift on the basis of formation spectrum signature obtained from C/O logging. In order to delete anomalies existing in logging curve, a method of detecting and deleting anomalies is provided, and the interpolation values are used to replace the abnormal data. A simple and effective adaptive filter is used to decrease statistic noise of the curve. Examples show that the technique presented in the paper can enhance quality of the curve, hence enhance the precision of oil saturation interpreted.