Results 261 to 270 of about 145,183 (304)

Attenuation Anisotropy in Fractured Media

Proceedings, 2013
In order to observe the effects of fractures on seismic response, a finite-difference wave equation method is developed to model wave propagation in anisotropic media, in which the elastic constants represent fractures effectively. As these elastic constants are frequency dependent, wave simulation is implemented in the frequency domain.
Y. Rao, Y.H. Wang
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Attenuation Anisotropy in Fractured Media

Proceedings, 2014
In order to observe the effects of fractures on seismic response, a finite-difference wave equation method is developed to model wave propagation in anisotropic media, in which the elastic constants represent fractures effectively. As these elastic constants are frequency dependent, wave simulation is implemented in the frequency domain.
Y. Rao, X.H. Chen, J.Y. Li, W. Song, Y.H. Wang   +4 more
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Well Logging in Fractured Media

2020
This chapter provides an overview of well logging in carbonate formations from the perspective of CO2 sequestration projects. The chapter begins with a summary of the various types of logs such as gamma ray, neutron porosity, bulk density, resistivity, photoelectric, sonic, pulsed neutron capture, nuclear magnetic resonance, image log, and elemental ...
Autumn Haagsma, Isis Fukai, Erica Howat, Jared Schuetter, Amber Conner, Ben Grove, Srikanta Mishra, Neeraj Gupta   +7 more
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Permeability of fractured porous media

ECMOR VII - 7th European Conference on the Mathematics of Oil Recovery, 2000
Flow in fractured porous media was first investigated by Barenblatt and Zheltov (1960) and Barenblatt et al. (1960) by means of the double porosity model. A direct and complete solution of the flow in such media is given in this paper. Some preliminary results are presented and discussed; they show the importance of the percolation threshold of the ...
I. Bogdanov, V. V. Mourzenko, J. -F. Thovert, P. M. Adler   +3 more
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Elastic fracture in driven media

Physica B: Condensed Matter, 2000
Fracture as one of the mechanical properties of materials is structurally dependent. Defects, defect assemblies, grain boundaries and sub-boundaries materials, modify the local stress intensity factors intensively. Brittle fracture prefers to confine itself to the grain boundary where the specific surface energy is lower than that in the grain.
C.W Lung, S.G Wang, Q.Y Long
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Fracture in Viscoelastic Media

1967
This chapter discusses the analytical extension of Griffith’s work to linearly viscoelastic materials. Through consideration of the simple case of a spherical flaw loaded by hydrostatic tension, it is found that the crack initiation criterion depends on the loading history. The chapter concludes with some remarks on fatigue fracture in elastomers.
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Flow in fractured porous media

Water Resources Research, 1977
The equations governing the flow of fluid through fractured porous media are derived. These equations consist of Darcy's law for fluid flow in the primary pores, equations of motion for fluid flow in the fractures, and two continuity equations. The system of equations is coupled by the interaction of fluid in the primary pores with fluid in the ...
James O. Duguid, P. C. Y. Lee
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Amplitude signatures in fractured media

2020
<p>Most of existing rocks are typically fractured that effectively result in anisotropic model of different complexity (Tsvankin and Grechka, 2011). The anisotropy signatures can be defined by traveltime and reflection&transmission amplitudes at plane interface between the rocks of different properties.
Alexey Stovas, Song Jin
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Wave propagation in disordered fractured porous media

Physical Review E, 2014
Extensive computer simulations have been carried out to study propagation of acoustic waves in a two-dimensional disordered fractured porous medium, as a prelude to studying elastic wave propagation in such media. The fracture network is represented by randomly distributed channels of finite width and length, the contrast in the properties of the ...
Hossein, Hamzehpour, Fatemeh Haghsheno, Kasani, Muhammad, Sahimi, Reza, Sepehrinia   +3 more
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Gravity-Induced Drainage From Fractured Porous Media

Proceedings of SPE Western Regional Meeting, 1992
Abstract Experimental results for flow rates and production from gravity drainage experiments involving water and aqueous surfactant solutions are presented. Computer Aided Tomography (CAT scan) results are also given which show through vertical saturation distributions that significant capillary connectivity occurs across horizontal ...
E. J. Stones, S. S. Marsden, S. A. Zimmermann   +2 more
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