摘要
储层岩石的孔隙空间具有良好的分形特征。将分形几何学的原理运用于储层岩石的孔隙结构研究，能建立毛细管压力曲线、相对渗透率、孔喉大小分布等的分形模型。但这些模型只有在求取了孔隙结构分形维数Ｄ 的基础上，才可能对孔隙结构作出预测。本文提出了在建立毛细管压力分形模型的基础上，运用毛细管压力资料预测分形维数Ｄ。通过实测检验证明，该方法不仅简便易行、精度高，而且能直接得到三维空间的信息，值得研究和推广应用。
There is fractal property in reservior rocks. According to the principle of the fractal geometry, the pore structure can be studied, and the fractal model of the capillary pressure curve and the relative permeability and the pore throat distribution can be set up. But the pore structure can be predicted when the fractal dimension D has been acquired. At present, the fractal dimension is acquired by the scanning electron microscopy. But it is not easy to use it to calculate D . Based on proposed fractal capillary pressure model, the fractal dimension D is predicted by capillary pressure data. The practical data verifies the validity of this method and the method is simpler than scanning electron microscopy. Key words:the fractal geometry; pore structure; scanning electron microscopy; the capillary pressure; the fractal dimension Mechanical analysis99 (ISSN1000-2634, IN CHINESE) The self-excited oscillation cavity is the device that produces pulse jet. After it had been applied to the petroleum industry, great profit has been obtained. UP to now, little has been known about its structure character in order to make it work efficiently, it is necessary further research it. Therefore the characteristics of the inherent frequency and the relations with related parameters were analyzed in this paper. The theoretical formulas were verified by experiment. A new kind of cavity design method to the 4 1/2” mono-cone bit and 5” diamond bit installed the self-excited oscillation cavity were provided in this paper. At the same time, some fundamental studies for the fluid flow law and computer simulation were also accomplished.
出处
《石油实验地质》
CAS
CSCD
北大核心
1999年第4期372-375,301,共5页
Petroleum Geology & Experiment
基金
国家"863"项目
关键词
孔隙结构
分形维数
储集层
岩心分析
the self-excited oscillation cavity, frequency characteristic, bit, design, computer simulation
