Petrophysical Characterization of Carbonate Naturally Fractured Reservoirs for Use in Dual Porosity Simulators

Abstract

Petrophysical properties of matrix, of a multiporosity system and the new Dual Porosity Petrophysical Model allows to obtain petrophysical properties of secondary system using conventional logs based on several types of criteria geologic, geophysical, of reservoirs and petrophysical.The main petrophysical parameters and the specific model are the basement for building the dynamic parameters such as: matrix permeability using matrix porosity and a power model with matrix cementation exponent, system permeability using total porosity and a power model with dual porosity cementation exponent, intrinsic permeability using matrix and system permeability, secondary porosity, and a model for mixing two media, equivalent fracture width using a intrinsic permeability and a model with adjustable coefficient, equivalent size of matrix block using equivalent fracture width, secondary porosity and single cubic model, shape factor using equivalent size of matrix block and a Kazemi¥s model. The dynamic parameters are vital to calculate the oil recovery, under several schedules.