logo
Request Quote

NEWS

  1. Home
  2.  / Pore Collapse And Grain Crushing On Ultrasonic

Pore Collapse And Grain Crushing On Ultrasonic

S during pore collapse and grain crushing is not straightforward Indeed elastic wave velocities can be affected by two distinct and competitive mechanisms 1 cracking and 2 porosity reduction In the first case it is well known that elastic wave velocities may be reduced substantially during triaxial compression experiments in the

Latest News

Effects Of Pore Collapse And Grain Crushing On Ultrasonic

Effects Of Pore Collapse And Grain Crushing On Ultrasonic

At a critical effective confining pressure P a large mechanical decrease of porosity was observed that was due to pore collapse and grain crushing Theoretically two different processes are affecting the elastic wave velocities in counteracting ways during cataclastic compaction cracking and porosity decrease

View All

Effects Of Pore Collapse And Grain Crushing On Ultrasonic

Effects Of Pore Collapse And Grain Crushing On Ultrasonic

2 Effects of pore collapse and grain crushing on 3 ultrasonic velocities and V pV s 4 Je rome Fortin 1 Yves Gue guen 1 and Alexandre Schubnel2 5 Received 20 August 2005 revised 13 February

View All

Effects Of Pore Collapse And Grain Crushing On Ultrasonic

Effects Of Pore Collapse And Grain Crushing On Ultrasonic

Aug 21 2007 On both curves the inflection point P corresponds to the onset of grain crushing and pore collapse Zhang et al 1990 Wong et al 1997 equal to 180 and 135 MPa in the dry and wet experiment respectively Beyond P accelerating inelastic volume compaction occurs due to extensive grain crushing grain displacement and pore collapse

View All

Effect Of Pore Collapse And Grain Crushing On The

Effect Of Pore Collapse And Grain Crushing On The

Jul 29 2020 A saturated Bleurswiller sandstone of 25 porosity was compacted by increasing the confining pressure over the critical pressure P which characterizes the onset of pore collapse and grain crushing The frequency dependence of Youngs moduli were measured before and after the compaction using forced oscillation method in a triaxial cell For the intact and compacted samples

View All

Pdf Effects Of Pore Collapse And Grain Crushing On

Pdf Effects Of Pore Collapse And Grain Crushing On

Effects of pore collapse and grain crushing on ultrasonic velocities and VP VS Article PDF Available in Journal of Geophysical Research Atmospheres 112B8 August 2007 with 349 Reads

View All

2 Effects Of Pore Collapse And Grain Crushing On 3

2 Effects Of Pore Collapse And Grain Crushing On 3

2 Effects of pore collapse and grain crushing on 3 ultrasonic velocities and VpVs By Re Schubnel Abstract a large mechanical decrease of porosity was observed that 11 was due to pore collapse and grain crushing Theoretically two different processes are 12 affecting the elastic wave velocities in counteracting ways during cataclastic

View All

Citeseerx 2 Effects Of Pore Collapse And Grain Crushing

Citeseerx 2 Effects Of Pore Collapse And Grain Crushing

At a critical 10 effective confining pressure P a large mechanical decrease of porosity was observed that 11 was due to pore collapse and grain crushing Theoretically two different processes are 12 affecting the elastic wave velocities in counteracting ways during cataclastic compaction 13

View All

Ultrasonic Sand Crushing Principle

Ultrasonic Sand Crushing Principle

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

View All

Ultrasonic Crushing Us

Ultrasonic Crushing Us

Pdf Effects Of Pore Collapse And Grain Crushing On Effects of pore collapse and grain crushing on ultrasonic velocities and VP VS let us point out that if the material contains only cracks the Medical Ultrasonic Cells Crushing Homogenizer

View All

Effect Of Pores And Grain Size On The Elastic And

Effect Of Pores And Grain Size On The Elastic And

The role of grain size and porosity in the piezoelectric and elastic properties of SiO 2 based materials was investigated using resonant piezoelectric spectroscopy RPS and resonant ultrasound spectroscopy RUS RPS performed on agate revealed a piezoelectric effect comparable in magnitude to that in single crystal quartz

View All

What Are The Cases And Effects On Rocks Crushing

What Are The Cases And Effects On Rocks Crushing

Effects of pore collapse and grain crushing on ultrasonic velocities dominant effect so that grain crushing and porosity reduction were accompanied by a In particular the increase in VpVs in the wet case is well reproduced and shows the 100 connect the effective elastic properties of

View All

On The Porescale Mechanisms Leading To Brittle And

On The Porescale Mechanisms Leading To Brittle And

Various different ways to model pore collapse also have been proposed and among them Wang et al 29 used grain shrinkage to simulate intra granular cracking and grain crushing processes In these models porosity is derived based on the spaces generated from the random assembly of the circular disks or spherical particles

View All

Deformation Bands In Porous Carbonate Grainstones Field

Deformation Bands In Porous Carbonate Grainstones Field

Recent field based studies documented deformation bands in porous carbonates these structures accommodate volumetric andor shear strain by means of pore collapse grain rotation andor sliding

View All

Thermal Damage And Pore Pressure Effects On Brittle

Thermal Damage And Pore Pressure Effects On Brittle

Thermal Damage and Pore Pressure Effects on Brittle Ductile Transition of Comiso Limestone A Castagna1 Mechanical tests with ultrasonic data of heat treated dry and saturated limestones Volcanoes can collapse as a result of underground magma gas andor water flows and

View All

Separation Of Tensile And Shear Cracks Based On Acoustic

Separation Of Tensile And Shear Cracks Based On Acoustic

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 amp Nelson P P 1992 Acoustic emissions produced by discrete fracture in rock Part 2

View All

Characterization And Analysis Of Porosity And Pore

Characterization And Analysis Of Porosity And Pore

Porosity plays a clearly important role in geology It controls fluid storage in aquifers oil and gas fields and geothermal systems and the extent and connectivity of the pore structure control fluid flow and transport through geological formations as well as the relationship between the properties of individual minerals and the bulk properties of the rock

View All

Stress Distribution During Cold Compression Of A Quartz

Stress Distribution During Cold Compression Of A Quartz

We report new experimental results that quantify the stress distribution within a quartz aggregate during pore collapse and grain crushing The samples were probed with synchrotron X ray diffraction as they were compressed in a multianvil deformation apparatus at room temperature from low pressure tens of megapascal to pressures of a few gigapascal

View All

Digital Rock Physics For Fast And Accurate Special Core

Digital Rock Physics For Fast And Accurate Special Core

Note that this assumes that the pore space and rock framework deforms without large micro structural changes such as pore collapse grain rotation and grain crushing Figure 11 P wave velocity and stress for carbonate samples

View All

Pore Pressure Distribution Along Plate Interface That

Pore Pressure Distribution Along Plate Interface That

Sudden decrease in permeability is induced by pore collapse beyond a critical pressure Sometimes there was a sharp drop in permeability by about three orders of magnitude immediately following the onset of pore collapse and grain crushing at the critical pressure We take this pore collapse into account when calculating pore pressure

View All

Stress Distribution During Cold Compression Of A Quartz

Stress Distribution During Cold Compression Of A Quartz

We report new experimental results that quantify the stress distribution within a quartz aggregate during pore collapse and grain crushing The samples were probed with synchrotron X ray diffraction as they were compressed in a multianvil deformation apparatus at room temperature from low pressure tens of megapascal to pressures of a few

View All

Solidfluid Substitution Scheme Constrained By Porescale

Solidfluid Substitution Scheme Constrained By Porescale

To ensure Gassmann consistency Glubokovskikh et al modelled the compliant pores as grain to grain contacts open into stiff pores Compliant pores are modelled as thin circular disks with traction free edges The Effects of pore collapse and grain crushing on ultrasonic velocities and VpVs J

View All

Effects Of Pore Fluids On Quasistatic Shear Modulus

Effects Of Pore Fluids On Quasistatic Shear Modulus

At ultrasonic frequencies the shear strengthening due to unrelaxed response is compensated by shear weakening due to porescale interface phenomena thus it is not correct to compare ultrasonic measurements neither with Gassmanns theory nor with the model presented in this paper because those theories are applicable only for low

View All

Supercritical Co2 Interaction Induced Pore Morphology

Supercritical Co2 Interaction Induced Pore Morphology

Enhanced coal bed methane ECBM recovery via CO2 geological storage CGS involves CO2 adsorption and CH4 desorption from coal pores gas diffusion and flow through coal matrix and cleats which are closely related to coal pore morphology To characterize and quantify the alterations of pore morphology of different ranked coals treated by supercritical CO2 ScCO2 CGS was simulated with a

View All

Biot S Effective Stress Coefficient Of Rocks For Peak And

Biot S Effective Stress Coefficient Of Rocks For Peak And

The grain sizes of the minerals were 0 51 2mm for plagioclase about 0 5mm in size for augite 0 30 8mm for hypersthene and 0 31 0mm for hornblende Doi 1963 The Kimachi sandstone was sampled at Shimane prefecture Japan and was a rela tively well sorted clastic rock with a typical grain size Table 1 Target values of confining and pore

View All