03884nam 2200601Ia 450 991043779080332120200520144314.01-299-19782-53-642-34845-910.1007/978-3-642-34845-7(CKB)2670000000337164(EBL)1082849(OCoLC)827212393(SSID)ssj0000879342(PQKBManifestationID)11464010(PQKBTitleCode)TC0000879342(PQKBWorkID)10852669(PQKB)10786734(DE-He213)978-3-642-34845-7(MiAaPQ)EBC1082849(PPN)168327570(EXLCZ)99267000000033716420130206d2013 uy 0engur|n|---|||||txtccrMulti-component acoustic characterization of porous media /Karen N. van Dalen1st ed. 2013.Berlin ;New York Springer20131 online resource (182 p.)Springer thesesDoctoral thesis accepted by Delft University of Technology, The Netherlands.3-642-43141-0 3-642-34844-0 Includes bibliographical references and index.Governing equations for wave propagation in a fluid-saturated porous medium -- Green’s tensors for wave propagation in a fluid-saturated porous medium -- On wavemodes at the interface of a fluid and a fluid-saturated poroelastic solid -- Pseudo interface waves observed at the fluid/porous-medium interface. A comparison of two methods -- Impedance and ellipticity of fluid/elastic-solid interface waves: medium characterization and simultaneous displacement - pressure measurements -- Impedance and ellipticity of fluid/porous-medium interface waves: medium characterization and simultaneous displacement - pressure measurements -- In-situ permeability from integrated poroelastic reflection coefficients.The feasibility to extract porous medium parameters from acoustic recordings is investigated. The thesis gives an excellent discussion of our basic understanding of different wavemodes, using a full-waveform and multi-component approach. Focus lies on the dependency on porosity and permeability where especially the latter is difficult to estimate. In this thesis, this sensitivity is shown for interface and reflected wavemodes. For each of the pseudo-Rayleigh and pseudo-Stoneley interface waves, unique estimates for permeability and porosity can be obtained when impedance and attenuation are combined. The pseudo-Stoneley wave is most sensitive to permeability: both the impedance and the attenuation are controlled by the fluid flow. Also from reflected wavemodes unique estimates for permeability and porosity can be obtained when the reflection coefficients of different reflected modes are combined. In this case, the sensitivity to permeability is caused by subsurface heterogeneities generating mesoscopic fluid flow at seismic frequencies. The results of this thesis suggest that estimation of in-situ permeability is feasible, provided detection is carried out with multi-component measurements. The results largely affect geotechnical and reservoir engineering practices.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Porous materialsAcoustic propertiesMathematical modelsFluid dynamicsPorous materialsAcoustic propertiesMathematical models.Fluid dynamics.620.1/064Dalen Karen N. van1764101MiAaPQMiAaPQMiAaPQBOOK9910437790803321Multi-component acoustic characterization of porous media4204830UNINA