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为了测定分形分析在地下数据地质解释中的适用性,将一种分形方法(重(新)标(定)距离分析)用于北海北部 Dunlin油田河流—三角洲相 Brent群(中侏罗统)的电缆测井数据分析中。分析结果表明:伽马射线测井(GR)的分维数介于1.0025～1.1033之间。维数越高可能指示地层岩性或储层的非均质性越强。但是,其实施过程的分析表明:在测井资料的解释中应用分形应重视概念;计算过程中的变化可能引起单井分维数估算值的变化大于井间所见到的变化。分形在电缆测井地质解释中应用的有效性和适用性需要认真分析。
To determine the applicability of fractal analysis to geological interpretation of subsurface data, a fractal method (heavy (new) subscript (fixed) distance analysis) was applied to the Brent Group (Middle Jurassic) of the river-delta facies Dunlin field in the northern North Sea Cable logging data analysis. The analysis results show that the fractal dimension of gamma ray logging (GR) is between 1.0025 and 1.1033. Higher dimensions may indicate that the lithology of the formation or the stronger the heterogeneity of the reservoir. However, the analysis of the implementation process shows that the concept of fractal should pay attention to the interpretation of log data. The changes in the calculation process may cause the estimated single-well fractal dimension to change more than the change between wells. The validity and applicability of fractal in cable logging geological interpretation require careful analysis.