用测井曲线能谱分析技术研究沉积速率

Studying Sedimentation Rate by Means of Spectral Analysis of Logs

由Ｍｉｌａｎｋｏｖｉｔｃｈ 天文 气候周期变化引起的沉积环境周期变化可能引起沉积物性的旋回性质变化，这些沉积物性质的变化能够被测井资料所记录。采用测井曲线能谱分析识别这些规则的旋回， 并用来认识已知的Ｍｉｌａｎｋｏｖｉｔｃｈ 周期。使用测井曲线的滑动窗能谱分析确定沉积速率的变化和不连续性， 并根据已知的Ｍ 周期和测井资料能谱分析的频率计算一个能谱分析窗内的沉积速率。针对一个地区实际测井资料的研究和与古生物地层资料确定的沉积速率资料的比较， 说明方法的实用性。

Periodic change in depositional environment due to Milankovitch astronomic and climatic cycles may cause cyclic patterns in sediment properties which can be recorded by logging data Logs are used to identify regular cycles and the known Milankovitch periodicity The variation and discontinuity in sedimentation rate are detected by spectral analysis of logs with sliding window through logging signal Based on the given Milankovitch periodicity and frequency from spectral analysis of logs,the sedimentation rate for a window of spectral analysis is calculated Comparing the result of this method with the sedimentation rate determined by palaeontological stratigraphy data shows that the method is practical