pore collapse and granite crushing on ultrasonic

  • pore collapse and rock crushing on ultrasonic

    Effects of pore collapse and grain crushing on ultrasonic velocities (principle of symmetry). 67 microstructural observations that grain crushing in sand-. 84 stone is . 200 of ultrasonic P and S velocities, as well as local strains.

  • Effects of pore collapse and grain crushing on ultrasonic

    Abstract. Compressional, shear wave velocities and their ratio, V p /V s, were measured along with porosity variations during wet and dry hydrostatic compaction of Bleurswiller sandstone, a 25% porosity Vosgian sandstone.At first, increase in hydrostatic pressure was accompanied by a simultaneous increase of both V p and V s as expected. At a critical effective confining

  • Cited by: 153
  • CiteSeerX — 2 Effects of pore collapse and grain crushing

    CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): 6 [1] Compressional, shear wave velocities and their ratio, Vp/Vs, were measured along with 7 porosity variations during wet and dry hydrostatic compaction of Bleurswiller sandstone, a 8 25 % porosity Vosgian sandstone. At first, increase in hydrostatic pressure was 9 accompanied by a

  • Mechanics of pore collapse and compaction in weak porous

    The pore collapse in reservoir rocks may lead to a reduction in permeability [MareL 1979]. In addition, transformation of rock into sand may result from compaction, destruction of the skeleton microstructure, and/or crushing of grains. Such loose particles may then start to migrate toward the well, leading to serious "sanding" problems.

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  • Effects of pore collapse and grain crushing on ultrasonic

    pores with low aspect ratios and raises the velocities. However, our data show that during pore collapse and grain crushing, elastic wave velocities decrease, which implies that they are more affected by cracks than by porosity reduction. To interpret theoretically and quantitatively these results, we consider a porous rock as made of a mixture of

  • Cited by: 153
  • Effects of pore collapse and grain crushing on ultrasonic

    2 Effects of pore collapse and grain crushing on 3 ultrasonic velocities and V p/V s 4 Je´roˆme Fortin,1 Yves Gue´guen,1 and Alexandre Schubnel2

  • Effects of pore collapse and grain crushing on ultrasonic

    Aug 21, 2007· [32] When pore collapse and grain crushing take place (at P = P*), the crack density ρ raises from 0 to a mean value of 0.1 (curve 3). An anomalous feature just beyond P * is that crack densities inferred from equations (8) and (9) become different: Inversion of G moduli gives a ρ value close to 0.2, whereas inversion of K moduli data gives a

  • Cited by: 153
  • Dilatancy, compaction, and failure mode in andesite: the

    Dec 01, 2011· The void space (a combination of cracks and pores) within the rock can either demonstrate net dilatation or net compaction. The resultant behaviour of the rock is governed by the competition between micromechanical processes, namely dilatational microcracking versus grain crushing and pore collapse.

  • Author: M. J. Heap, Y. Lavallee, E. C. David, L. Petrakova, P. Baud, D. B. Dingwell, T. Reuschle
  • Influence of fluids on VP/VS ratio: increase or decrease

    Dec 07, 2018· SUMMARY. The evolution of the ratio between P- and S-wave velocities (V P /V S) with increasing fluid-saturated porosity is computed for isotropic rocks containing spheroidal pores.The ratio V P /V S is shown to either decrease or increase with increasing porosity, depending on the aspect ratio α of the pores, fluid to solid bulk modulus ratio ζ and Poisson’s

  • Author: Nicolas Brantut, Emmanuel C David
  • Wellbore stability analysis in porous carbonate rocks

    R is a shape factor, given by the ratio between major axis and minor axis of the ellipse, X()κ is the value of I1 at the intersection of the cap with I1 axis and L()κ is the value of I1 at the intersection of the cap with shear line ()h I 1. It is assumed that material is subjected to strain hardening during compaction.The hardening law is a function of plastic strains and is determined

  • quora

    quora

  • Sub-Sternal Thyroids and Goiters. Thyroids which grow

    Sub-Sternal Thyroids and Goiters Thyroids which grow into the chest to cause problems. Please read the page on thyroid goiters before you read this page. It will make it easier to understand. The normal thyroid gland resides in the neck, with both lobes wrapping gently around the trachea (breathing tube).

  • 9 Deadliest Rocks And Minerals On Earth Forbes

    Feb 14, 2016· 9 Deadliest Rocks And Minerals On Earth. Trevor Nace Senior Contributor. In many instances mine collapse or equipment failure can be much more deadly than the ore that is being mined. Both

  • What kind of gravel can I use as a base for my retaining wall?

    What kind of gravel can I use as a base for my retaining wall? outdoor. Close. 16. Posted by 3 years ago. You don't want the soil working its way into the gravel and filling the pores. For the same reason, if you use your broken-up concrete- sift or wash it first. Don't use the tiny fragments. Use the concrete only behind the wall, not as a

  • Engineering Characteristics of Earth Materials Flashcards

    Engineering Characteristics of Earth Materials study guide by valerie_bright includes 50 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades.

  • Dilatancy, compaction, and failure mode in andesite: the

    The void space (a combination of cracks and pores) within the rock can either demonstrate net dilatation or net compaction. The resultant behaviour of the rock is governed by the competition between micromechanical processes, namely dilatational microcracking versus grain crushing and pore collapse.

  • Influence of fluids on VP/VS ratio: increase or decrease

    SUMMARY. The evolution of the ratio between P- and S-wave velocities (V P /V S) with increasing fluid-saturated porosity is computed for isotropic rocks containing spheroidal pores.The ratio V P /V S is shown to either decrease or increase with increasing porosity, depending on the aspect ratio α of the pores, fluid to solid bulk modulus ratio ζ and Poisson’s

  • Combo with "Weathering and Soils (Geology)" and 10 others

    Start studying Combo with "Weathering and Soils (Geology)" and 10 others. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

  • Wellbore stability analysis in porous carbonate rocks

    R is a shape factor, given by the ratio between major axis and minor axis of the ellipse, X()κ is the value of I1 at the intersection of the cap with I1 axis and L()κ is the value of I1 at the intersection of the cap with shear line ()h I 1. It is assumed that material is subjected to strain hardening during compaction.The hardening law is a function of plastic strains and is determined

  • Fluid/Rock Interactions in Porous Carbonate Rocks: An

    Fluid/Rock Interactions in Porous Carbonate Rocks: An Integrated Mechanical, Ultrasonic and Microstructural Study Claudio Delle Piane1, Michael B. Clennell1, Jeremie Dautriat1, and Graham Price2 Search and Discovery Article #41745 (2015)**

  • Digital rock physics: numerical prediction of pressure

    A hydrostatic compression test on Berea sandstone has shown that grain crushing and pore collapse occur at a critical pressure of P* around 390 MPa (Wong & Baud 1999). Figure 3 Open in new tab Download slide

  • Separation of Tensile and Shear Cracks Based on Acoustic

    Tensile sources are more frequent at the tip of a fault propagating through granite than near its tail. Pore collapse and grain crushing prevail in the process zone of sandstone and the amount of tensile cracks is much smaller than in granite. References. Glaser, S.D. & Nelson, P.P. 1992. Acoustic emissions produced by discrete fracture in rock

  • Experimental Investigation of Elastic Weakening Effects

    Summary To investigate the role of adsorption on elastic weakening, an experimental protocol is designed to measure elastic properties at standard T-P conditions under varying room Relative Humidity. A large dataset of clean limestone and sandstone samples is measured as to determine global trends. It is shown that limestones are not affected by this adsorption phenomenon.

  • A method for determining absolute ultrasonic velocities

    J. Fortin, Y. Guéguen, A. SchubnelEffects of pore collapse and grain crushing on ultrasonic velocities and Vp/Vs J Geophys Res: Solid Earth, 112 (2007), pp. 1

  • quora

    quora

  • Sub-Sternal Thyroids and Goiters. Thyroids which grow

    Sub-Sternal Thyroids and Goiters Thyroids which grow into the chest to cause problems. Please read the page on thyroid goiters before you read this page. It will make it easier to understand. The normal thyroid gland resides in the neck, with both lobes wrapping gently around the trachea (breathing tube).

  • 9 Deadliest Rocks And Minerals On Earth Forbes

    Feb 14, 2016· 9 Deadliest Rocks And Minerals On Earth. Trevor Nace Senior Contributor. In many instances mine collapse or equipment failure can be much more deadly than

  • All House Related Solutions GharPedia

    Select Category Exterior Living Room Bedroom Kitchen Dining Room Table Bathroom Staircase T.V. Unit Wardrobe Bed Door Window Chair Sofa Center Table Dressing

  • What kind of gravel can I use as a base for my retaining wall?

    What kind of gravel can I use as a base for my retaining wall? outdoor. Close. 16. Posted by 3 years ago. You don't want the soil working its way into the gravel and filling the pores. For the same reason, if you use your broken-up concrete- sift or wash it first. Don't use the tiny fragments. Use the concrete only behind the wall, not as a

  • Engineering Characteristics of Earth Materials Flashcards

    Engineering Characteristics of Earth Materials study guide by valerie_bright includes 50 questions covering vocabulary, terms and more. Quizlet flashcards, activities

  • Dilatancy, compaction, and failure mode in andesite: the

    The void space (a combination of cracks and pores) within the rock can either demonstrate net dilatation or net compaction. The resultant behaviour of the rock is governed by the competition between micromechanical processes, namely dilatational microcracking versus grain crushing and pore collapse.

  • Large-deformation and high-strength amorphous porous

    Apr 13, 2016· Amorphous carbon spheres were obtained through a low-cost, simple and controllable ultrasonic spray pyrolysis approach using alkali propiolates (HC≡CCOOM, M =

  • Combo with "Weathering and Soils (Geology)" and 10 others

    Start studying Combo with "Weathering and Soils (Geology)" and 10 others. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

  • Recent Soils and Foundations Articles Elsevier

    CiteScore: 2.40 ℹ CiteScore: 2019: 2.400 CiteScore measures the average citations received per document published in this title. CiteScore values are based on citation counts in a given year (e.g. 2015) to documents published in three previous calendar years (e.g. 2012 14), divided by the number of documents in these three previous years (e.g. 2012 14).

  • Wellbore stability analysis in porous carbonate rocks

    R is a shape factor, given by the ratio between major axis and minor axis of the ellipse, X()κ is the value of I1 at the intersection of the cap with I1 axis and L()κ is the value of I1 at the intersection of the cap with shear line ()h I 1. It is assumed that material is subjected to strain hardening during compaction.The hardening law is a function of plastic strains and is determined

  • Fluid/Rock Interactions in Porous Carbonate Rocks: An

    Fluid/Rock Interactions in Porous Carbonate Rocks: An Integrated Mechanical, Ultrasonic and Microstructural Study Claudio Delle Piane1, Michael B. Clennell1, Jeremie Dautriat1, and Graham Price2 Search and Discovery Article #41745 (2015)**

  • Digital rock physics: numerical prediction of pressure

    A hydrostatic compression test on Berea sandstone has shown that grain crushing and pore collapse occur at a critical pressure of P* around 390 MPa (Wong

  • Separation of Tensile and Shear Cracks Based on Acoustic

    Tensile sources are more frequent at the tip of a fault propagating through granite than near its tail. Pore collapse and grain crushing prevail in the process zone of sandstone and the amount of tensile cracks is much smaller than in granite. References. Glaser, S.D. & Nelson, P.P. 1992. Acoustic emissions produced by discrete fracture in rock