Computerized Tomography (CT) and Digital Photography (DP) are new naturally fractured reservoir engineering imaging techniques that measures density inside fractured cores and micromodels samples during laboratory experiments. An image processing method for determining, simultaneously, some of basic geometrical characteristics of homogeneous and fractured porous media such as porosity, specific surface, mean pore width, mean grain thickness, mean fracture width, and absolute permeability is presented. The proposed method is characterized by its simplicity and by use of a X-ray tomography equipment and a digital camera. The experimental procedure used to evaluate various geometrical characteristics is based upon the surface analysis of a sample for a digital camera and upon a cross-section of a core model for a X-ray CT. In view of this fact, the applicability of the method is extended for heterogeneous and anisotropic samples such as fractured and vugged cores and micromodels.
Four experimental cases, digital images included, are presented: homogenous, one fracture, one vug, and a combination matrix-fracture-vug. Finally, two experiments of imbibition in fractured systems of one and four blocks of Berea sandstone are presented, where digital image processin procedure has been applied in terms of water saturation.