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Effects Of Pore Fluids In The Subsurface On Ultrasonic Wave Propagation
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Book Synopsis Effects of Pore Fluids in the Subsurface on Ultrasonic Wave Propagation by :
Download or read book Effects of Pore Fluids in the Subsurface on Ultrasonic Wave Propagation written by and published by . This book was released on 1998 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates ultrasonic wave propagation in unconsolidated sands in the presence of different pore fluids. Laboratory experiments have been conducted in the sub-MHz range using quartz sand fully saturated with one or two liquids. Elastic wave propagation in unconsolidated granular material is computed with different numerical models: in one-dimension a scattering model based on an analytical propagator solution, in two dimensions a numerical approach using the boundary integral equation method, in three dimensions the local flow model (LFM), the combined Biot and squirt flow theory (BISQ) and the dynamic composite elastic medium theory (DYCEM). The combination of theoretical and experimental analysis yields a better understanding of how wave propagation in unconsolidated sand is affected by (a) homogeneous phase distribution; (b) inhomogeneous phase distribution, (fingering, gas inclusions); (c) pore fluids of different viscosity; (d) wettabilities of a porous medium. The first study reveals that the main ultrasonic P-wave signatures, as a function of the fraction on nonaqueous-phase liquids in initially water-saturated sand samples, can be explained by a 1-D scattering model. The next study investigates effects of pore fluid viscosity on elastic wave propagation, in laboratory experiments conducted with sand samples saturated with fluids of different viscosities. The last study concentrates on the wettability of the grains and its effect on elastic wave propagation and electrical resistivity.
Book Synopsis Effects of Pore Fluids in the Subsurface on Ultrasonic Wave Propagation by : Patricia Katharina Siefert
Download or read book Effects of Pore Fluids in the Subsurface on Ultrasonic Wave Propagation written by Patricia Katharina Siefert and published by . This book was released on 1998 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Ultrasonic Wave Interactions with Fluid-saturated Porous Rocks . Annual Report by : Laszlo Adler
Download or read book Investigation of Ultrasonic Wave Interactions with Fluid-saturated Porous Rocks . Annual Report written by Laszlo Adler and published by . This book was released on 1992 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two years we have continued our investigation of ultrasonic wave propagation in fluid-filled porous materials. First, we studied the feasibility of using different surface modes to characterize both synthetic and natural rocks. We introduced a novel experimental technique based on the direct generation of surface waves by edge excitation. We used two low-frequency (100--500 kHz) shear transducers in pitch-catch mode to launch and receive the ultrasonic surface wave. The contact transducers were coupled to the opposite edges of the porous specimens with normal polarization relative to the surface. The same technique was successfully used to generate Rayleigh-type surface modes on the free surface of both dry and water-saturated specimens, as well as Stoneley-type interface modes on the fluid-loaded surfaces of immersed samples. Our main achievement in this area is the realization that, due to surface tension, practically closed-pore boundary conditions can prevail on the free surface of a water-saturated rock for completely open pores. As a result, the velocity of the true surface mode might be much lower than the Rayleigh velocity of the dry skeleton.
Book Synopsis The Propagation of Ultrasonic Waves in Gas-containing Suspensions by : Natalia Morkun
Download or read book The Propagation of Ultrasonic Waves in Gas-containing Suspensions written by Natalia Morkun and published by Cambridge Scholars Publishing. This book was released on 2019-01-08 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the results of research in the field of automated systems for the monitoring and control of technological processes of mining production. It offers the first mathematical description of Lamb waves’ propagation processes on surfaces in contact with randomly heterogeneous media (gas-containing suspensions). It is also the first book to explore the analytical dependencies of the attenuation values of Lamb and volume ultrasound waves on the number, size, density, and other characteristics of heterogeneous media during their natural and specially organized movements.
Book Synopsis Effects of Ultrasonic Energy on Fluid Flow in Porous Media by : Charles A. Komar
Download or read book Effects of Ultrasonic Energy on Fluid Flow in Porous Media written by Charles A. Komar and published by . This book was released on 1967 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enabling Secure Subsurface Storage in Future Energy Systems by : J.M. Miocic
Download or read book Enabling Secure Subsurface Storage in Future Energy Systems written by J.M. Miocic and published by Geological Society of London. This book was released on 2023-08-31 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: The secure storage of energy and carbon dioxide in subsurface geological formations plays a crucial role in transitioning to a low-carbon energy system. The suitability and security of subsurface storage sites rely on the geological and hydraulic properties of the reservoir and confining units. Additionally, their ability to withstand varying thermal, mechanical, hydraulic, biological and chemical conditions during storage operations is essential. Each subsurface storage technology has distinct geological requirements and faces specific economic, logistical, public and scientific challenges. As a result, certain sites can be better suited than others for specific low-carbon energy applications. This Special Publication provides a summary of the state of the art in subsurface energy and carbon dioxide storage. It includes 20 case studies that offer insights into site selection, characterization of reservoir processes, the role of caprocks and fault seals, as well as monitoring and risk assessment needs for subsurface storage operations.
Book Synopsis Absorption and Dispersion of Ultrasonic Waves by : Karl F. Herzfeld
Download or read book Absorption and Dispersion of Ultrasonic Waves written by Karl F. Herzfeld and published by Academic Press. This book was released on 2013-10-22 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Absorption and Dispersion of Ultrasonic Waves focuses on the influence of ultrasonics on molecular processes in liquids and gases, including hydrodynamics, energy exchange, and chemical reactions. The book first offers information on the Stokes-Navier equations of hydrodynamics, as well as equations of motion, viscosity, formal introduction of volume viscosity, and linearized wave equation for a nonviscous fluid. The manuscript then ponders on energy exchange between internal and external degrees of freedom as relaxation phenomenon; effect of slow energy exchange on sound propagation; different ways of evaluating the dispersion curve; and exact calculation of absorption and dispersion. The text examines the effects of chemical reactions, thermodynamic theory of relaxation, and mixtures. The book also evaluates the absorption of high intensity sound waves, ratio of relaxation absorption to classical absorption at maximum, and gas mixtures. Discussions also focus on translational relaxation in monatomic gases, linear triatomic molecules, and results for rotational relaxation. The manuscript is a dependable source of data for readers interested in the absorption and dispersion of ultrasonic waves.
Download or read book Geothermal Energy Update written by and published by . This book was released on 1976 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EPA Publications Bibliography written by and published by . This book was released on 1999 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Viscoelastic Wave Propagation Along a Borehole Using Squirt Flow and Biot Poroelastic Theory by : Elliot Jeremy Hans Dahl
Download or read book Viscoelastic Wave Propagation Along a Borehole Using Squirt Flow and Biot Poroelastic Theory written by Elliot Jeremy Hans Dahl and published by . This book was released on 2017 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations of seismic waves provide valuable understanding of Earth subsurface properties. These measurements are used to study large-scale subsurface features, kilometers in width, borehole-scale situations, meters of interest, and with core samples, a few centimeters in length. A common practice is to assume that the elastic rock-properties (P- and S-wave velocities) are the same for all frequencies. This is why sonic logs without corrections, for example, are used to constrain velocity models that transform seismic data from time to depth and to calibrate rock physics models used in seismic inversion to link elastic properties to reservoir properties. However, when seismic waves propagate in Earth materials, they are subject to different dispersion mechanisms, which makes the velocities frequency dependent. Understanding these effects on acoustic wave propagation can improve our models that constrain the subsurface and ultimately give us better hydrocarbon predictability. The main objective of this dissertation is to contribute to the understanding of how fluid in the pore space affects acoustic wave propagation. To achieve this goal, I first developed a frequency-dependent wave equation that accounts for local (squirt) and global (Biot) flow. The new model is tested against other squirt-Biot flow theories for both synthetic cases and utrasonic velocity data. I find the developed model to be consistent with the compared models in the synthetic cases. For the utrasonic velocity data, I find predictions from the new model to be closest to the measured data. In the second part of the dissertation, I use the developed squirt-Biot flow wave equation to simulate wave propagation in fluid-filled boreholes containing formations with different quantities of compliant pores. These are compared with formations where no compliant pores are present. I use the discrete wavenumber summation method with both a monopole and a dipole source to generate the wave fields. I find that fluid-saturated compliant pores can significantly affect the effective formation P- and S-wave velocities. This in turn affects the various acoustic wave modes causing increasing dispersion and attenuation. Thus, knowledge of the micro-scale structure of the fluid-saturated rock is of importance for understanding the acoustic waveforms and the dispersive behavior of the various modes. Depending on the locations where the critical frequencies for the different dispersion mechanisms occurs, acoustic velocity estimates can differ from the seismic-frequency velocities. Having a frequency dependent model accounting for the various dispersion mechanisms can help better connect the various velocity measurements and ultimately serve to give us an even more realistic picture of the subsurface.
Book Synopsis (Investigation of Ultrasonic Wave Interactions with Fluid-saturated Porous Rocks). by : Laszlo Adler
Download or read book (Investigation of Ultrasonic Wave Interactions with Fluid-saturated Porous Rocks). written by Laszlo Adler and published by . This book was released on 1992 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two years we have continued our investigation of ultrasonic wave propagation in fluid-filled porous materials. First, we studied the feasibility of using different surface modes to characterize both synthetic and natural rocks. We introduced a novel experimental technique based on the direct generation of surface waves by edge excitation. We used two low-frequency (100--500 kHz) shear transducers in pitch-catch mode to launch and receive the ultrasonic surface wave. The contact transducers were coupled to the opposite edges of the porous specimens with normal polarization relative to the surface. The same technique was successfully used to generate Rayleigh-type surface modes on the free surface of both dry and water-saturated specimens, as well as Stoneley-type interface modes on the fluid-loaded surfaces of immersed samples. Our main achievement in this area is the realization that, due to surface tension, practically closed-pore boundary conditions can prevail on the free surface of a water-saturated rock for completely open pores. As a result, the velocity of the true surface mode might be much lower than the Rayleigh velocity of the dry skeleton.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1977 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wave Fields in Real Media by : José M. Carcione
Download or read book Wave Fields in Real Media written by José M. Carcione and published by Elsevier. This book was released on 2014-12-08 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authored by the internationally renowned José M. Carcione, Wave Fields in Real Media: Wave Propagation in Anisotropic, Anelastic, Porous and Electromagnetic Media examines the differences between an ideal and a real description of wave propagation, starting with the introduction of relevant stress-strain relations. The combination of this relation and the equations of momentum conservation lead to the equation of motion. The differential formulation is written in terms of memory variables, and Biot's theory is used to describe wave propagation in porous media. For each rheology, a plane-wave analysis is performed in order to understand the physics of wave propagation. This book contains a review of the main direct numerical methods for solving the equation of motion in the time and space domains. The emphasis is on geophysical applications for seismic exploration, but researchers in the fields of earthquake seismology, rock acoustics, and material science - including many branches of acoustics of fluids and solids - may also find this text useful. New to this edition: This new edition presents the fundamentals of wave propagation in Anisotropic, Anelastic, Porous Media while also incorporating the latest research from the past 7 years, including that of the author. The author presents all the equations and concepts necessary to understand the physics of wave propagation. These equations form the basis for modeling and inversion of seismic and electromagnetic data. Additionally, demonstrations are given, so the book can be used to teach post-graduate courses. Addition of new and revised content is approximately 30%. Examines the fundamentals of wave propagation in anisotropic, anelastic and porous media Presents all equations and concepts necessary to understand the physics of wave propagation, with examples Emphasizes geophysics, particularly, seismic exploration for hydrocarbon reservoirs, which is essential for exploration and production of oil
Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustics of Porous Media by : Thierry Bourbié
Download or read book Acoustics of Porous Media written by Thierry Bourbié and published by Editions TECHNIP. This book was released on 1987 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Machine Learning for Subsurface Characterization by : Siddharth Misra
Download or read book Machine Learning for Subsurface Characterization written by Siddharth Misra and published by Gulf Professional Publishing. This book was released on 2019-10-12 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Machine Learning for Subsurface Characterization develops and applies neural networks, random forests, deep learning, unsupervised learning, Bayesian frameworks, and clustering methods for subsurface characterization. Machine learning (ML) focusses on developing computational methods/algorithms that learn to recognize patterns and quantify functional relationships by processing large data sets, also referred to as the "big data." Deep learning (DL) is a subset of machine learning that processes "big data" to construct numerous layers of abstraction to accomplish the learning task. DL methods do not require the manual step of extracting/engineering features; however, it requires us to provide large amounts of data along with high-performance computing to obtain reliable results in a timely manner. This reference helps the engineers, geophysicists, and geoscientists get familiar with data science and analytics terminology relevant to subsurface characterization and demonstrates the use of data-driven methods for outlier detection, geomechanical/electromagnetic characterization, image analysis, fluid saturation estimation, and pore-scale characterization in the subsurface. - Learn from 13 practical case studies using field, laboratory, and simulation data - Become knowledgeable with data science and analytics terminology relevant to subsurface characterization - Learn frameworks, concepts, and methods important for the engineer's and geoscientist's toolbox needed to support
Download or read book Petroleum Abstracts written by and published by . This book was released on 1997 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
