EXTENSION OF SKIN EFFECT THEORY FOR OIL-GAS WELLS TAKING INTO ACCOUNT DEPENDENCE OF PERMEABILITY ON RADIUS AND PRESSURE
M.I. Epov1, N.N. Mikhailov2,3,4, О.Е. Аксютин5, V.N. Sokotuschenko2, O.M. Ermilov2,6
1Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
2Gubkin Russian State University of Oil and Gas, Leninsky pr. 65, bldg. 1, Moscow, 119991, Russia
3Institute of Oil and Gas Problems, Russian Academy of Sciences, Moscow, Russia
4M.V. Lomonosov Moscow State University, Moscow, Russia
5PJSC “Gazprom”, Saint Petersburg, Russia
6LLC “Gazprom Dobycha Nadym”, Nadym, Russia
Keywords: Skin factor, Hawkins model, three-zone model, permeability, radial dependence, borehole environment, linear penetration
Abstract
a:2:{s:4:"TEXT";s:1439:"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 (
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