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Assessment Fundamental Concepts of Reservoir Geomechanics
1. Anisotropy refers to material properties that depend on ___________.
2. Why is Mohr’s circle useful in geomechanics? (Select all that apply.)
A .It can be used with stresses referred to principal or non-principal coordinates.
B .It provides a graphical method for determining shear and normal stresses acting on any plane in a three-dimensional solid.
C .It provides a method for predicting when rock is stable or unstable.
D .It is a graphical method for displaying the state of stress in two and three dimensions.
3. _____________ is a parameter that characterizes rock deformation.
4. Which statement describes the theory of poroeleasticity?
A .The deformation of a fluid-filled porous solid caused by externally applied shear stress
B .The deformation of a fluid-filled porous solid caused by externally applied normal stress
C .The deformation of a fluid-filled porous solid caused by externally applied bulk stress
D .The stress in a fluid-filled porous solid caused by externally applied shear strain
5. In what way is knowledge of geomechanics important for effectively exploiting hydrocarbons?
A .Optimizing field production plans
B .Predicting wellbore stability and reservoir deformation
C .Constructing predictive models for hydrocarbon extraction
D .Predicting initial hydrocarbon volumes during exploration
6. Stress-induced anisotropy is best developed in ____________. (Select all that apply.)
A .thrust faults
B .grain contacts
C .fractures
D .micro-cracks
7. The infinitesimal strain approximation is valid when strain is less than what order of magnitude?
A .10-8 to 10-4
B .10-5 to 10-4
C .10-3 to 10-2
D .10-10 to 10-8
8. Effective stress ____________. (Select all that apply.)
A .is controlled by applied stress
B .is controlled by pore fluid pressure
C .has a normal component
D .has a shear component
E .is equivalent to hydrostatic stress
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