Abstract: The complicated phenomena of geology have the characteristics of internal self-similarity, so the fractal theory could be applied in them for quantitative prediction. By establishing the theoretic model and calculating three kinds of dimensional numbers,the fractal theory have been used for reservoir prediction and hydrocarbon diagenesis. Through applied examples analysis, it is indicated that the fractal dimension technique can accurately display the characteristics of seismic waves and the variation of reservoir itself and it is a good method for reservoir prediction and hydrocarbon di agenesis.

Key words: reservoir, model, prediction, fractal theory, dimensional number