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the lossesin the skin zone had no major effect on the occurrenceof additional resistances and, as such, they had nosubstantial effect on the operating conditions of thewell. This meant that the skin zone, as a thin layerwhich

placed online), depending on the conductancecoefficient of the skin zone on a hypothetical model.Their research showed that at a hydraulic conductivity of the skin zone greater than [Ks/ds]=1,0×10–4 s–1,the skin effect may be

conductance coefficient of the skin zone was less than thedeclared value (e.g. wells RB-7m and RB-42), theeffects of incrustation were evident. Where the filtration properties of the skin zone were better than proposed (e.g