孔隙结构特征参数的分形表征  

Fractal characterization of characteristic parameters of pore structure

作　　者：马新仿[1] 张士诚[1] 郎兆新[1] 

机构地区：[1]中国石油大学(北京)

出　　处：《油气地质与采收率》2005年第6期34-36,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家"973"项目"大幅度提高石油采收率的基础研究"(G1999022509)的部分内容

摘　　要：储层岩石的孔隙结构具有分形特征,孔隙结构的分形维数可以定量描述孔隙结构的复杂程度和变化规律。应用分形几何的原理,根据储层岩石孔隙分布和毛细管压力曲线的分形几何模型,建立了孔隙结构特征参数的分形表征方法。根据毛细管压力曲线资料,应用该方法计算了孔隙结构的分形维数和各种特征参数值。计算结果表明,孔隙结构的分形维数在2到3之间,用该方法计算得到的储层岩石孔隙结构特征参数的变化规律与传统统计参数的变化规律是一致的。该方法不仅简单易行,精度很高,并且使孔隙结构的特征参数从传统的定性描述转变为定量计算,对油田开发具有实际意义和参考价值。There was fractal property of pore structure in reservoir rocks,and its fractal dimensions can describe quantitatively the complexity and variation rule. According to the principle of the fractal geometry, using fractal geometric model of pore distribution and capillary pressure curve obtained the fractal expression of characteristic parameters of the pore structure. The fractal dimensions and characteristic parameter values of the pore structure were calculated based on the capillary pressure curve data. The results showed that the value of the fractal dimension of the pore structure varied between 2 and 3, and the variation rule computed from the characteristic parameters of pore structure of reservoir rocks was consistent with the variation rule of traditional statistic parameters. This method was not only simple but more exact, and it made the characteristic parameters of pore structure transform from qualitative description to quantitative computation, and it had very important signification to oil field development.

关 键 词：孔隙结构 分形维数 特征参数 毛细管压力 定量计算 

分 类 号：TE112.2[石油与天然气工程—油气勘探]