Выпуск: 10 , Том: 67 , Год издания: 2026

The research develops the classical concept of the skin factor proposed by M.F. Hawkins [Hawkins, 1956]. We demonstrate a fundamental limitation of the Hawkins model, in which the permeability of the drilling mud filtrate invaded zone is assumed to be constant (Kskin = const). Based on the analysis of modern experimental data, a complex skin factor model is proposed that takes into account the dependence of permeability K in the borehole environment (BE) on the distance from the borehole wall (radius r) and pressure p: k = k(r, p). This model includes three characteristic invaded zones with different mechanisms of permeability change. Comparative modeling has been performed, revealing significant discrepancies between the classical Hawkins permeability model and the proposed three-zone model k = k(r) and complex k = k(r, p). For a linear change in permeability, we construct comparative relative dependencies of the flow rate on the skin factor, as well as those of the skin factor and flow rate on the depression. It is found that the average deviation of the flow rate forecast using the classical model is 15-25%, reaching 40-50% in zones of maximum penetration. The results are fundamental to filtration theory and have practical implications for oil-field development design, allowing for a differentiated approach to selecting stimulation techniques for different invaded zones.