Abstract: The predicted pore throat volume by the capillary pressure data is a key parameter and can be used to evaluate the shutoff of trap and the favorable area of hydrocarbon accumulation. But it is not easy to acquire the capillary pressure data, and it is easy to acquire the porosity and permeability data by common core analysis. So if we can inverse the distribution of pore throat or
the capillary pressure curve by the pore and permeability data of the core? Based on the fractal geometry, the capillary pressure curve of inversion is acquired by the porosity and permeability data, and the model for estimating the distribution of pore throat is set up. It opens up a new way for the study of pore structure in non-cored formation. The practical data verifies the
validity of this method.

Key words: porosity, permeability, distribution of pore throat, capillary pressure curve, fractal geometry