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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 Gardner's relation ： ウィキペディア英語版 Gardner's relation Gardner's relation, or Gardner's equation, named after G. H. F. Gardner and L. W. Gardner, is an empirically derived equation that relates seismic P-wave velocity to the bulk density of the lithology in which the wave travels. The equation reads: :$\backslash rho\; =\; \backslash alpha\; V\_p^$ where $\backslash rho$ is bulk density given in g/cm3, $V\_p$ is P-wave velocity given in ft/s, and $\backslash alpha$ and $\backslash beta$ are empirically derived constants that depend on the geology. Gardner et al. proposed that one can obtain a good fit by taking $\backslash alpha\; =\; 0.23$ and $\backslash beta\; =\; 0.25$. Assuming this, the equation is reduced to: :$\backslash rho\; =\; 0.23\; V\_p^.$ If $V\_p$ is measured in m/s, $\backslash alpha\; =\; 0.31$ and the equation is: :$\backslash rho\; =\; 0.31\; V\_p^.$ This equation is very popular in petroleum exploration because it can provide information about the lithology from interval velocities obtained from seismic data. The constants $\backslash alpha$ and $\backslash beta$ are usually calibrated from sonic and density well log information but in the absence of these, Gardner's constants are a good approximation. ==References== 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「Gardner's relation」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.