ISSN:0016-8025    

DOI:10.1046/j.1439-0345.2003.02049.x-i1

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

ABSTRACTThe magnitude of the streaming potential due to the passage of a liquid through a porous medium is examined, under conditions similar to those found in an aquifer under the action of a pumping well. Three models simulate flow in channels, conduits, and unconfined aquifers for several grain sizes of sands and for several resistivities of fluids. The ratio of the streaming potential to the pressure difference is constant for a selected sand and fluid, decreases as grain size increases, is essentially independent of the geometry of the flow, increases slightly as the permeability decreases, and decreases as the salt concentration increases. Extremely low streaming potentials can be expected near a pumping well.

ISSN:0016-8025    

DOI:10.1111/j.1365-2478.1964.tb01889.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

RESUMEPour caractériser les anomalies de la carte initiate et de la carte transformeé, on définit des indices de netteté désingés respectivement parI0etIet on étudie le rapportI/I0pour diverses formules appliquées à trois anomalies typiques (sphère, anticlinal, faille). Les courbes obtenues permettent d'introduire, par analogie avec les circuits électriques, des notions telles que profondeur de coupur

ISSN:0016-8025    

DOI:10.1111/j.1365-2478.1964.tb01890.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

ABSTRACTThis study is an attempt to find a phenomenological model which will behave in a manner similar to that of common earth materials in regard to the dependence of attenuation and phase velocity on frequency.An analysis of two commonly employed rheological models, Maxwell's and Kelvin‐Voigt's and their variants, is presented indicating that these models are too simple to conform phenomenologically to the behavior of rocks. It is shown that a linear combination of the Maxwell and Kelvin‐Voigt models, known as the standard linear solid, comes closer to giving an adequate description of the behavior of some earth materials, than either one of the two models.A method of determining the viscoelastic constants of a solid is presented provided that its attenuation and dispersion curves are known. The viscoelastic constants (relaxation times and/or viscosity coefficients) of the solid are determined by superimposing the experimental curves on master curves, and reading the constants off the theoretical curves.An analysis of published experimental data is presented, indicating that the present model is capable of accounting for at least some attenuation and dispersion phenom

ISSN:0016-8025    

DOI:10.1111/j.1365-2478.1964.tb01891.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractThe exact responses of plane interfaces to incident spherical compressional waves are calculated by an electronic computer. The reflected part of the response is shown for various positions of the ‘shot’ and of the ‘receiver’ as well as for various velocity contrasts. This makes it possible to study some features of the reflection process, especially the behaviour beyond the critica

ISSN:0016-8025    

DOI:10.1111/j.1365-2478.1964.tb01892.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

ABSTRACTThe problem of three‐dimensional migration is solved for arbitrary, three‐dimensional, continuously differentiable velocity functionsv=v(x4) by means of series.The derived formulae are applied to numerical examples.The possibility of approximating real, discontinuous velocity distributions by continuous functions is mentioned and illustrated by an example.The application of electronic computers, which is necessary due to the complexity of the formulas, is discus

ISSN:0016-8025    

DOI:10.1111/j.1365-2478.1964.tb01893.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

Book received in this Articles:P. E. Potterand F. J. Pettijohn,Paleoccurrents and Basin Analysis

ISSN:0016-8025    

DOI:10.1111/j.1365-2478.1964.tb01894.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY