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rock bulk modulus

Bulk Modulus an overview | ScienceDirect Topics

The bulk modulus of the mineral matrix can be calculated from the known composition of the rock, such as from core studies or from an assumed mineralogy of the constituents, which the rock is supposed to be composed of. Thus, the Reuss averaging method for two mineral compositions gives:

The relationship between dry rock bulk modulus and

Russell and Smith 4 CREWES Research Report — Volume 19 (2007) FIG. 1. A family of dry rock over matrix bulk modulus ratio curves for varying values of k. An alternate approach to changing Kdry as a function of porosity is the critical porosity method (Nur, 1992, Mavko and Mukerji, 1995).

Bulk modulus | physics | Britannica

Bulk modulus, numerical constant that describes the elastic properties of a solid or fluid when it is under pressure on all surfaces. The applied pressure reduces the volume of a material, which returns to its original volume when the pressure is removed. Sometimes referred to as the

basalt rock bulk modulus

25/07/2016· Rock bulk modulus in south africa for sale basalt rock bulk modulus, modulus of elasticity of basalt in mpa ? Crusher South Africa . The bulk modulus of

How to Calculate and Solve for Bulk Modulus of Elasticity

Now, Click on Bulk Modulus of Elasticity (E) under Rock Mechanics The screenshot below displays the page or activity to enter your values, to get the answer for the bulk modulus of elasticity (E) according to the respective parameters which are the young’s modulus (E) and Poisson’s ratio (v).

NEGATIVE POISSON’S IN AUXETIC FOAMS COMMON ELASTIC

ELASTIC MODULI and PHYSICAL PROPERTIES of ROCKS Content YOUNG'S MODULUS (E) BULK MODULUS OR INCOMPRESSIBILITY (K) POISSON’S RATIO (V) SHEAR MODULUS (P) ELASTIC MODULI IN FLUIDS NEGATIVE POISSON’S IN AUXETIC FOAMS COMMON ELASTIC MODULI IN ROCKS Ackowledgements: Thanks to William Doll for detecting errors in this document . FLUIDS YOUNG'S MODULUS (E) A L 0 L F E ' ' This modulus

PEH:Rock Properties PetroWiki

Bulk modulus is more strongly sensitive to water saturation. The bulk volume deformation produced by a passing seismic wave results in a pore volume change, and causes a pressure increase of pore fluid (water). This has the effect of stiffening the rock and increasing the bulk modulus. Shear deformation usually does not produce pore volume

13 Earth Materials University College London

Shear modulus and bulk modulus Shear or rigidity modulus: σS =GεS =µεs Bulk modulus (1/compressibility): −P =Kεv Can write the bulk modulus in terms of the Lamé parameters λ, µ: K = λ+ 2µ/3 and write Hooke’s law as: σ= (λ+2µ) ε Young’s or stiffness modulus: σn =Eεn Mt Shasta andesite. GNH7/GG09/GEOL4002 EARTHQUAKE SEISMOLOGY AND EARTHQUAKE HAZARD Young’s Modulus

Bulk Modulus an overview | ScienceDirect Topics

where. K IFM = dry frame bulk modulus. K m = rock matrix grain bulk modulus. K f = fluid bulk modulus. Gassmann's equation represents perfect coupling between the pore fluid and the solid skeleton of the porous medium (Schön, 1996). This relation is strictly valid only for isotropic, homogeneous rock composed of a single mineral.

Some Useful Numbers Jackson School of Geosciences

Some Useful Numbers on the Engineering Properties of Materials (Geologic and Otherwise) GEOL 615 Coefficient of sliding friction ( ) For most rocks, varies between 0.8 and 0.5. A value of 0.60 would be a good number for general use. Glass on glass 0.4 Rubber on concrete 0.75 Steel on steel 0.55 Angle of internal friction ( Rock 30

THE DEFORMATION MODULUS OF ROCK MASSES

THE DEFORMATION MODULUS OF ROCK MASSES comparisons between in situ tests and indirect estimates Arild Palmström, Ph.D., Norway 1 Rajbal Singh, Ph.D., India 2 SUMMARY Three methods of in situ deformation modulus (Em) measurements of rock masses have been described, analysed and compared. The plate jacking (PJT) test, where the deformations

Rock Stress-strain relationships | Britannica

The Table gives the values of some elastic constants—bulk modulus (k), Young’s modulus (E), shear modulus (μ), and Poisson’s ratio (σ p)—at room pressure (1 bar) and high confining pressure (3,000 bars). The values for clastic sedimentary rocks would be particularly variable.

DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES 1

where K is called the bulk modulus. Note that G and K are related to E and < as follows 2.2 Dynamic Elastic Constants The Young's modulus, Poisson's ratio and shear modulus can be determined by dynamic methods. Dynamic elastic properties are obtained by rapid application of stress to a rock specimen. One method of achieving this is to subject

Rock physics SEG Wiki

Bulk Modulus. The bulk modulus, K (Pa) of a material describes its ability to withstand volumetric stress, = The inverse of the bulk modulus is defined as the compressibility, β = The bulk modulus is related to the Lamé parameters by = + When compared to the isotropic form of Hooke's Law, this expresses that volumetric deformation depends on normal and shear stiffnesses. The bulk modulus

Compressibility Wikipedia

Negative compressibility. In general, the bulk compressibility (sum of the linear compressibilities on the three axes) is positive, i.e. an increase in pressure squeezes the material to a smaller volume. This condition is required for mechanical stability. However, under very specific conditions the compressibility can be negative.

WHAT ARE THE VALUES OF MODULUS OF ELASTICITY &

Modulus of Elasticity of Rock Modulus of elasticity of rocks depend upon several factors, such as, Type of rock Porosity Grain size Water content Value of modulus of elasticity can be determined by static or dynamic methods. Higher value of modulus of elasticity indicates good quality rock having sound composition. Typical values of modulus of []

Relations between static and dynamic moduli of sedimentary

The static bulk modulus (K stat) and Young’s modulus (E stat) can be found as the ratio between hydrostatic stress σ) and volumetric strain (ε vol) increments in a hydrostatic test or the ratio between axial stress (σ z) and axial strain (ε z) increments in a uniaxial test, respectively: K stat = σ ε vol, (3) 128 2018 European Association of Geoscientists & EngineersC. Relations

What is the elastic modulus of Sandstone? Answers

Fluids, such as water, are nearly incompressible, and exhibit a bulk modulus of about 300,000 psi (2 GPa). That means that if confined itis diffuclt to compress.

basalt rock bulk modulus

25/07/2016· Rock bulk modulus in south africa for sale basalt rock bulk modulus, modulus of elasticity of basalt in mpa ? Crusher South Africa . The bulk modulus of

Practical Gassmann fluid substitution in sand/shale sequences

rated bulk modulus K sat: (3) In turn, the bulk modulus of the new rock requires knowl-edge of the mineral modulus K 0, the fluid modulus K f and the pore space stiffness K φ (Mavko and Mukerji, 1995; Avseth et al., 2005): (4) with (5) The pore space stiffness K φ is related to porosity, mineral modulus, and the dry rock bulk modulus K d by (6)

Rock Stress-strain relationships | Britannica

The Table gives the values of some elastic constants—bulk modulus (k), Young’s modulus (E), shear modulus (μ), and Poisson’s ratio (σ p)—at room pressure (1 bar) and high confining pressure (3,000 bars). The values for clastic sedimentary rocks would be particularly variable.

(PDF) ELASTIC PROPERTIES OF ROCKS ResearchGate

In contrast, the bulk modulus of water is 2340 MPa, four orders of magnitude less compressible or deformable than air ( Table 2; but >10× times smaller than the Young's modulus of rock, 20000

Rock Mechanics

Rock strength and modulus properties determined on small intact hand samples does not necessarily match field conditions ! Weakest link principle = overall strength of a rock not determined by bulk properties, but by strength of weakest link ! Rock discontinuities • Depositional discontinuities • Fractures • Bedding planes

The relationship between dry rock bulk modulus and

The relationship between dry rock bulk modulus and porosity –an empcriia sltudy Brian Russell* and Tad Smith Hampson-Russell, A CGGVeritas Company * Adjunct Professor, University of Calgary. Introduction There are various approaches to computing K dry as a function of porosity, and thus inferring changes in fluid content as a function of porosity. One common approach is the pore space

ROCK PHYSICS BASICS Stanford University

ROCK PHYSICS BASICS Need for Static Moduli 2c 2b S Hmin P b = 2c 1 − ν2 E (P − SH min) Importance of Static Young's Modulus and Poisson's Ratio for Hydrofracture Design Static moduli are often used in wellbore stability and in-situ stress applications to evaluate the possibility of breakouts, elevated pore pressure, and tectonic stress

Crain's Petrophysical Handbook | Elastic Constants Mech

The best known elastic constants are the bulk modulus of compressibility, Young's Modulus (elastic modulus), and Poisson's Ratio. The dynamic elastic constants can be derived with appropriate equations, using sonic log compressional and shear travel time along with density log data.

Difference between Young's Modulus, Bulk Modulus and

04/12/2019· The basic difference between young’s modulus, bulk modulus, and shear modulus is that Young’s modulus is the ratio of tensile stress to tensile strain, the bulk modulus is the ratio of volumetric stress to volumetric strain and shear modulus is the ratio of shear stress to shear strain.

Crain's Petrophysical Handbook | Calculating Mechanical

In recently drilled wells, this information is not always available. It would therefore be useful to predict fluid compressibility or fluid bulk modulus and use this result to predict the fluid type in the reservoir. A method using pore bulk modulus is more convenient, and is

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