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储层孔隙与喉道空间分布具有统计自相似性特点,孔隙结构特征也可以用分形几何学进行描述。与其他方法相比,岩石微观孔隙结构被我们用分形的方法看作复杂无规律的整体进行研究,这样,得到的计算结果更符合真实情况。本文基于压汞实验资料,计算出样品的孔隙结构分形维数。经过深入研究发现,孔隙结构分形维数与储层参数之间具有一定相关性,基于孔隙结构分形维数的储层物性参数建模能够取得较好效果。研究表明基于压汞资料所求取的,孔隙结构分形维数可为储层孔隙结构微观非均质性研究提供有效方法,并为进一步储层评价奠定基础。
The spatial distribution of reservoir porosity and throat is statistically self-similar, and the pore structure characteristics can also be described by fractal geometry. Compared with other methods, the micro-pore structure of rock is considered as a complex and irregular whole by our method of fractal, so that the calculated results are more in line with the real situation. Based on the mercury intrusion test data, the fractal dimension of the pore structure of samples was calculated. After further study, it is found that fractal dimension of pore structure has some correlation with reservoir parameters, and reservoir physical parameter modeling based on fractal dimension of pore structure can achieve good results. The results show that fractal dimension of pore structure, which is obtained from mercury intrusion data, can provide an effective method for the study of micro-heterogeneity of reservoir pore structure and lay a foundation for further reservoir evaluation.