Porosity and Fluid Saturations

POROSITY: Porosity is the best known physical characteristic of an oil reservoir.It determines the volume of oil or gas present,and all recovery computations must be based on knowledge of its value. Porosity of a material is defined as that fraction of the bulk volume of this material that is not occupied by the solid framework of the material.In oil reservoirs,the porosity represents the percentage of the total space that is available …

…reduce the air-water capillary presuure curve to an oil-water capillary pressure. Summarizing, fluid saturation determinations are probably the least reliable of the measurements performed on reservoir rock samples.Perhaps the best approach to a true solution of the problem is by correlation of quantitative information from various independent measuring means, to of which have been reviewed before, namely, by direct measurments of core samples and by indirect measurments through the use of capillary pressure curves.