To apply the principle of fractal geometry on study of the two dimensional distribution of fracture systems, the fracture systems have the statistical self similar characters and fractal characteristics in the scale extent studied in the North Qaidam Basin. The square of correlation coefficients(R2)by least squares lines fitting are more than 0.97 in log log coordinate system of box counting number and the scale. The D values of fractal dimension of fracture systems in 4 known oil and gas fields are more than 1.3, which is obviously higher than that of the whole district of 4 reflection layer(the average D value is 1.218). The locations that the D values of fractal dimension of fracture system exceed 1.3 are favorable to accumulate oil and gas. The higher the D value,the more favorable the conditions and larger the abundance of oil and gas.
Zeng Lianbo,Jin Zhijun,Li Jingchang et al. FRACTAL CHARACTERISTICS OF FRACTURAL STRUCTURES AND ITS RELATION TO OIL-GAS DISTRIBUTION IN NORTH QAIDAM BASIN[J]. Chinese Journal of Geology, 2001, (2): 241-247.