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在柴达木盆地达参 1井 ,应用自然伽玛曲线进行了 2 5万年以来基于年代的 R/ S分析 ,该时段分维数平均值为 1.2 2 9,与深海氧同位素曲线分维值 (1.2 2 )非常接近 ,证明了分数维提供了不同气候记录和不同代用指标之间对比的基础 .即达参 1井的自然伽玛曲线所反映的古环境变化类似于深海氧同位素曲线 ,其波动是受全球变化控制的 .基于深度的自然伽玛曲线 R/ S分析也表现出相似的规律性 ,支持了气候学的研究 .通过 R/ S分析辨别出时间序列的转折点 ,分别对应于自然伽玛值的阶段性变化 ,反映了气候变化的阶段性与构造运动的影响 ,以及沉积相与沉积环境之间的转换 ,表明自然伽玛曲线记录了丰富的环境变迁信息 .此外还表明 R/ S分析求分维数与时间间隔关系密切 ,在有足够序列长度支持并且分辨率许可的情况下 ,采用多种间隔求分维数 ,在此基础上讨论整个系统的分维数更为合理 .
Based on the R / S analysis of 25 000 years since the Gansu-1 well of the Qaidam Basin in the Qaidam Basin, the mean value of the fractal dimension in this period was 1.2 2 9, which was close to that of the deep-sea oxygen isotope curve (1.2 2) is very close, proving that the fractal dimension provides the basis for the comparison between different climatic records and different proxy indicators: the paleoenvironmental change reflected by the natural gamma ray curve of Da-Shen-1 well is similar to the deep-sea oxygen isotope curve, Fluctuations are controlled by global changes.The R / S analysis of natural Gamma curve based on depth also shows similar regularities and supports the research of climatology, and the turning point of time series is identified by R / S analysis, corresponding to the natural The phase change of gamma value reflects the phase of climate change and tectonic movement as well as the conversion between sedimentary facies and sedimentary environment, indicating that the natural gamma curve records abundant environmental change information. It also shows that R / S analysis of the fractal dimension is closely related to the time interval, in the case of sufficient sequence length support and resolution permission, the use of a variety of interval fractal dimension, on the basis of the discussion of the entire department The fractal dimension is more reasonable.