open_petro_elastic.material.sandstone.patchy_cement

open_petro_elastic.material.sandstone.patchy_cement(sand, cement, porosity, contact_cement_porosity, upper_bound_porosity, pressure, lower_bound_pressure, critical_porosity=0.4, shear_reduction=1.0, friable_coordination_number=9, cement_coordination_number=9)[source]

A hybrid sandstone model based on the patchy cement model of Avseth et. al (2016).

Parameters:

sand – Material representing the sand of the sandstone.
cement – Material representing the cement of the sandstone.
porosity – Porosity of the friable sandstone.
contact_cement_porosity – Porosity of the contact cement in the hybrid model.
upper_bound_porosity – The porosity of constant cement in the hybrid model.
pressure – Pressure used for friable sand.
lower_bound_pressure – The pressure used for the lower bound friable sand.
critical_porosity – The critical porosity of the sandstone.
shear_reduction – Shear reduction factor.
friable_coordination_number – The number of grain-grain contacts in the friable model
cement_coordination_number – The number of grain-grain contacts in the cemented model - to be kept constant

Avseth, Per & Skjei, Norunn & Mavko, Gary. (2016). Rock-physics modeling of stress sensitivity and 4D time shifts in patchy cemented sandstones — Application to the Visund Field, North Sea. The Leading Edge. 35. 868-878. 10.1190/tle35100868.1.