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基于目标要求进行非均质地层的地质建模,对地层局部地质信息的变异和随机性进行精细化描述和预测。基于随机分形理论,结合地质勘探资料,以孔隙率作为区域土层物性参数的数据源,采用改进数盒子法对钻孔数据分析和计算出分形维度,并应用Diamond-Square方法,考虑多个随机变量的相互关联作用,建立了孔隙率、渗透率等土层物性参数的随机分布预测模型。针对土层的地质点参数的相关性和其他不确定性因素,提出土性参数不确定性数学模型,并给出了土层中压缩模量与孔隙率之间的关系。
The geological modeling of heterogeneous stratum is based on the target requirements, and the variation and randomness of local geological information of stratum are described and predicted in detail. Based on random fractal theory and geologic prospecting data, the porosity was taken as the data source of regional soil physical parameters. The improved box method was used to analyze and calculate the fractal dimension of borehole data. Diamond-Square method was used to consider multiple random The interrelated function of variables was established, and the stochastic distribution prediction models of soil physical properties such as porosity and permeability were established. According to the correlation and other uncertainties of the parameters of the soil layer, a mathematical model of the uncertainty of the soil parameters is proposed, and the relationship between the compressive modulus and the porosity in the soil layer is given.