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从数学规律的角度,应用分形理论,对构造裂缝的分布发育规律进行研究.分数维D值越大,说明构造裂缝分布越均匀,各向异性较强,构造裂缝的分布发育较好.与走滑断裂属同一构造应力场的构造裂缝,随着距离走滑断裂距离的增大,分数维D值呈指数减小;随构造裂缝面密度的增大,分数维D值呈线性增大.分数维D值大小更能体现构造裂缝分布的均匀程度和各向异性,同时考虑构造裂缝面密度和分数维,引用发育程度f来表征岩石破裂程度.对裂缝油气藏来说f,越大表明岩石破裂程度越高,储层裂缝越发育.靠近断裂岩石破裂程度高,有利于油气的运移.
From the perspective of mathematical law, the fractal theory is applied to study the distribution and development of tectonic fractures.The larger the fractal D value, the more uniform the structural fractures, the stronger the anisotropy and the better the distribution of the structural fractures. The slip faults are tectonic fractures of the same tectonic stress field, and the fractal dimension D decreases exponentially with the increase of the strike-slip fracture distance. The fractional dimension D increases linearly with the increase of tectonic fracture surface density The value of dimension D can better reflect the uniformity and anisotropy of structural fracture distribution, and consider the structural fracture surface density and fractal dimension, and refer to the development degree f to characterize the degree of rock fracture. For fractured reservoirs, the larger f indicates that the rock The higher the degree of rupture, the more fractures in the reservoir are developed, and the high degree of rupture near the fractured rock is favorable for the migration of oil and gas.