测井数据滑动窗关联维计算和沉积学分析

应用滑动窗关联维计算方法对鲁北济阳坳陷某钻井剖面石炭系—二叠系陆表海沉积层段GR测井响应数据进行了分形维数计算,结果表明海侵体系域关联维数一般较小,且维数曲线振荡变化较弱,而高水位体系域则相反。这与海侵体系域形成时海平面上升的主控因素压制或掩盖了其他因素的显现有关,同时也证明测井序列分形分析能从另一个新的视角观察识别测井序列中所包含的地质信息。随着分形方法应用研究的不断开展,必将从测井数据中挖掘出更多的有用信息,指导油气等资源勘探与开发,丰富及完善测井地质学理论。相信将来分形会成为地质数据分析的标准工具。

Calculation of the sliding window correlation dimension of well logs and its sedimentary implication

The fractal dimension of the gamma-ray (RG) log of the Permo-Carboniferous epicontinental sedimentary interval of a well in the Jiyang depression was calculated by using the sliding window correlation dimension method. The results show that: the fractal dimension of the transgressive systems tract (TST) is generally small with a weak fluctuation but the reverse is true for the highstand systems tract (HST), which is because the overwhelming controlling factor of sea-level rise concealed or suppressed other factors during the formation of the TST. Meanwhile, this also demonstrates that the geological information contained in well logs could be recognized or achieved with the fractal method from a new angle. With the ongoing applied research on the fractal method, much more useful geological information will be extracted from well logs, which may be used to guide exploration and exploitation of oil-gas etc. and enrich and improve the well-log geology. The authors believe that in the future the fractal method will become a standard tool in the analysis of geologic data.