PETROPHYSICAL CHARACTERIZATION OF CARBONATE NATURALLY FRACTURED RESERVOIRS FOR USE IN DUAL POROSITY SIMULATORS

This study shows how multiporous system is grouped and the parameters obtained by means of a petrophysical characterization are used in a dual porosity simulator. Carbonate naturally fractured reservoir is a multiporous system that contain microfractures, fractures, vugs, macrovugs, matrix, type of fractures network. Because they must be incorporate into the Numerical Model of Simulation the results of the petrophysical characterization, it is conceptualized like a model of double porosity. Porosity of pseudomatrix. To the matrix porosity the porosity of the microfractures are grouped in one porous media. Secondary porosity. The vugs and the fractures are grouped in other porous media. In carbonated naturally fractured reservoir, the Jurassic tectonic generated faults, the zones near these generate runners of fractured zones which increases the secondary porosity in addition dolomitization process and dissolution. In geothermal or volcanics reservoir the are generated fractures and their runners of fractured zones by different processes, the main fractures are one porous media and microfractures are the secondary media due to their conection with the first porous media.