Category

Geomechanics and Fracturing

81 items

Axial stress around vertical wellbore

Axis of a deviated borehole from an arbitrary origin

Bulk modulus (using Lame)

Bulk modulus (using Poisson's ratio and Lame's constant)

Bulk modulus (using Poisson's ratio and shear modulus)

Change in pore volume due to initial water and rock expansion

Cohesive strength of rocks

Compressibility of a coalbed methane formation

Effect of pore pressure on stress

Effective stress on individual grains

Failure criteria (Mohr-Coulomb)

Formation compressibility by using hydrofrac data

Fracture conductivity

Fracture gradient (Eaton)

Fracture gradient (Holbrook)

Fracture gradient (Matthews and Kelly)

Fracture gradient (Zoback and Healy)

Fracture pressure (Hubert and Willis)

Fracture volume (GDK method)

Fracture volume (Perkins and Kern method)

Fracture width (GDK method)

Fracture width (Perkins and Kern method)

Hoek and Brown criteria for principal stress failure

Horizontal effective stress (assuming no lateral strain as per Lorenz and Teufel)

Horizontal maximum stress (Bredehoeft)

Induced fracture dip

Initial effective horizontal stress

Isothermal compressibility of limestones (Newman correlation)

Least principal stress as function of depth in Gulf of Mexico (Hubbert and Willis)

Least principal stress as function of depth in Gulf of Mexico (Matthew and Kelly)

Linearized Mohr failure line

Linearized Mohr coulomb criteria

M Modulus (using shear modulus and bulk modulus)

M Modulus (using Young's modulus and Poisson's ratio)

Maximum anisotropic failure stress

Maximum compression at vertical wellbore

Maximum normal stress in tangential direction at wellbore wall (hoop stress)

Maximum plane tangential stress acting on deviated wellbore (1)

Maximum principal stress failure (Hoek and Brown)

Maximum principal stress in normal faulting

Maximum principal stress in reverse faulting

Maximum principal stress in strike-slip faulting

Maximum principal stress calculation using breakout width

Minimum compression at vertical wellbore

Minimum normal stress in tangential direction at wellbore wall (hoop stress)

Maximum plane tangential stress acting on deviated wellbore (2)

Modified lade criterion

Normal stress in radial direction near wellbore

Normal stress in rock at failure

Normal stress in tangential direction at wellbore wall (hoop stress)

Normal stress in tangential direction near wellbore (hoop stress)

Pore pressure increase due to fluid activity (Mody and Hale)

Pore pressure increase due to given fluid activity contrast (Mody and Hale)

Pore pressure of shale (Flemings)

Pore pressure of shale (Traugott)

Porosity irreversible plastic deformation occurs

Pressure required to induce a tensile fracture (breakdown pressure)

Pressure to grow fractures (Abe, Mura, et al.)

Radial stress around vertical wellbore

Ratio of pore pressure change to original due to depletion

Rotation of maximum principal stress near wellbore

Rotation of maximum principal stress near wellbore (Zoback \ Day-Lewis)

Shale compaction

Shear modulus

Shear modulus from Young's modulus

Shear stress near vertical well

Slowness of the formation

Storativity of fractures

Stress at edge of wellbore breakout

Stress component near normal faulting in reservoir

Stress components in original coordinate system in depletion drive

Stress intensity at tip of mode I fracture

Stress path (induced normal faulting)

Stress path of reservoir with changes in production

Stress perturbation (Segall and Fitzgerald)

Subsidence due to uniform pore pressure reduction in free surfaces

Unconfined compressive strength of rock

Velocity of bulk compressional waves

Velocity of compression waves

Velocity of shear waves

Yield strength (Bingham plastic model)

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