Pore Structure Characteristics and Permeability Prediction Model in a Cretaceous Carbonate Reservoir, North Persian Gulf Basin

Due to the diversity of pore types, it is challenging characterize Middle East’s Cretaceous carbonate reservoir or accurately predict its petrophysical properties. In this paper, structure in first classified using a comprehensive method. Then, based on identified new permeability model with high prediction precision established. The dominated by 6 such as intergrain pores and moldic pores, rock types. Grainstone, algal packstone, wackestone, foraminifera wackestone are porous echinoderm mudstone nonporous types study area can be divided into four Type I has midhigh porosity medium-high due large throat, while type II fine throat midpermeability. their isolated low III IV, out these two, better storage capacity. Movable fluid saturation calculated spectral coefficient method rapex boundary between connected unconnected very well research area. It not accurate enough simply classify porosity. combination porosity, permeability, id="M2">rapex , flow zone indicator, quality index effectively distinguish noncoring wells. characteristics each consistent those fractal dimension, which thereby proves effectiveness classification. New models proposed for different good results have been obtained. This great significance enhancing oil recovery.