Journal ArticleDOI
Stress-induced ultrasonic wave velocity anisotropy in fractured rock
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TLDR
In this paper, it was shown that cracks with normals aligned along the stress direction are closed preferentially in agreement with the theory of Walsh, however, for crack normals perpendicular to the applied stress there is some evidence of crack opening that is not predicted by the theory.About:
This article is published in Ultrasonics.The article was published on 1988-11-01. It has received 88 citations till now. The article focuses on the topics: Crack closure & Stress (mechanics).read more
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Book
The Rock Physics Handbook: Tools for Seismic Analysis of Porous Media
TL;DR: In this article, the authors present basic tools for elasticity and Hooke's law, effective media, granular media, flow and diffusion, and fluid effects on wave propagation for wave propagation.
MonographDOI
The Rock Physics Handbook
TL;DR: The third edition of the reference book as discussed by the authors has been thoroughly updated while retaining its comprehensive coverage of the fundamental theory, concepts, and laboratory results, and highlights applications in unconventional reservoirs, including water, hydrocarbons, gases, minerals, rocks, ice, magma and methane hydrates.
Book
Quantitative Seismic Interpretation: Applying Rock Physics Tools to Reduce Interpretation Risk
TL;DR: In this paper, the authors present a statistical rock physics approach combining rock physics, information theory, and statistics to reduce uncertainty in seismic data. But they do not discuss the use of statistical methods for quantitative seismic interpretation.
Journal ArticleDOI
A simple technique for finding effective elastic constants of cracked solids for arbitrary crack orientation statistics
Colin M. Sayers,Mark Kachanov +1 more
TL;DR: In this paper, a tensor transformation of the effective elastic constants for isotropic orientation statistics through the use of a second-order crack density tensor is presented, which is based on a tensorial transformation for estimating the elastic stiffness tensor.
Journal ArticleDOI
Methods of calculating petrophysical properties from lattice preferred orientation data
David Mainprice,Michel Humbert +1 more
TL;DR: In this paper, the authors consider the theoretical problems of calculating the physical properties of an aggregate from the constituent crystal properties and the lattice preferred orientation, and show that the Voigt and Reuss bounds become increasingly separated with inceasing anisotropy, emphasising the need for better methods.
References
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Journal ArticleDOI
The velocity of compressional waves in rocks to 10 kilobars: 1.
TL;DR: The velocity of compressional waves has been determined by measurement of travel time of pulses in specimens of rock at pressures to 10 kilobars and room temperature as mentioned in this paper, mainly igneous and metamorphic rocks, furnished three specimens oriented at right angles to one another.
Journal ArticleDOI
Elastic moduli of a cracked solid
TL;DR: In this paper, a self-consistent method for the elastic moduli of bodies containing randomly distributed flat cracks, with or without fluid in their interiors, is proposed and general concepts are outlined for arbitrary cracks and explicit derivations together with numerical results are given.
Journal ArticleDOI
Wave speeds and attenuation of elastic waves in material containing cracks
TL;DR: In this paper, the authors derived explicit expressions for the overall elastic parameters and the overall wave speeds and attenuation of elastic waves in cracked materials where the mean crack is circular, and the cracks are either aligned or randomly orientated.
Journal ArticleDOI
The effect of cracks on the compressibility of rock
TL;DR: In this article, it was shown that porosity can be determined quite precisely from compressibility measurements, in particular for material in which all porosity occurs as narrow cracks, and that a crack increases compressibility nearly as much as a spherical pore of the same diameter as the length of the crack.
Journal ArticleDOI
Description of Crystallite Orientation in Polycrystalline Materials. III. General Solution to Pole Figure Inversion
TL;DR: In this article, the orientation distribution of crystallites in anisotropic polycrystalline samples can be derived from a set of plane-normal distributions obtained by x-ray diffraction measurements.