What is formation anisotropy?

A formation with directionally dependent properties. Most formations have vertical to horizontal permeability anisotropy with vertical permeability being much less (often an order of magnitude less) than horizontal permeability.

What is anisotropy in reservoir?

Anisotropy means that some properties of the porous medium do not have the same value in different directions. In the reservoir formation generally anisotropy can be caused by periodic layering. So generally we have different properties such as permeability at z direction compare to the x and y direction.

What is stress anisotropy?

1. n. [Formation Evaluation] A situation in which the formation shear-wave velocity varies azimuthally around the borehole, because unequal stresses in the formation have caused azimuthal variations in the stress concentrations around the borehole.

What is fast shear azimuth?

The azimuth of the fast-shear wave parallels the direction of maximum horizontal stress and the azimuth of the slow-shear wave parallels the direction of the minimum horizontal stress.

What is anisotropy and isotropy?

isotropic: Properties of a material are identical in all directions. anisotropic: Properties of a material depend on the direction; for example, wood. In a piece of wood, you can see lines going in one direction; this direction is referred to as “with the grain”.

What is anisotropy flow?

Anisotropic flow is a key observable to characterise the system created in heavy-ion collisions, as it is sensitive to the system’s initial state, transport properties, the equation of state and freeze-out conditions.

What is isotropic and anisotropic effect?

Isotropic refers to the properties of a material which is independent of the direction whereas anisotropic is direction-dependent. These two terms are used to explain the properties of the material in basic crystallography. Some examples of isotropic materials are cubic symmetry crystals, glass, etc.