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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Leverett J-function ： ウィキペディア英語版 Leverett J-function In petroleum engineering, the Leverett ''J''-function is a dimensionless function of water saturation describing the capillary pressure,〔 〕 :$J(S\_w)\; =\; \backslash frac$ where $S\_w$ is the water saturation measured as a fraction, $p\_c$ is the capillary pressure (in pascal), $k$ is the permeability (measured in m²), $\backslash phi$ is the porosity (0-1), $\backslash gamma$ is the surface tension (in N/m) and $\backslash theta$ is the contact angle. The function is important in that it is constant for a given saturation within a reservoir, thus relating reservoir properties for neighboring beds. The Leverett ''J''-function is an attempt at extrapolating capillary pressure data for a given rock to rocks that are similar but with differing permeability, porosity and wetting properties. It assumes that the porous rock can be modelled as a bundle of non-connecting capillary tubes, where the factor $\backslash sqrt$ is a characteristic length of the capillaries' radii. ==See also== * Amott test 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Leverett J-function」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.