Influence of porosity of casing strings and artificial screens on oil wells' output
The article introduces the concept of «conditional porosity of a pipe» for casing pipes in case of jet piercing. Formulas of calculation of a number of apertures per one running meter depending on diameter of an aperture in case of their linear and chess arrangement are received. The simple formula for calculation of additional resistance during oil filtration through a porous pipe is presented. The given formula is universal and can be used for definition of additional resistance in case of «contamination» of a near bottom hole zone during a layer opening.