Brine flood in a 1.9-in-long and 1.5-in-diameter core plug from the north sea resulted in a stabilized pressure drop of 46.05 psi. the flood was carried out at 0.05 ml/min with brine viscosity of 0.443 cp. determine the absolute permeability of this plug in millidarcies.

The characteristic roots of a dynamic system are: 1.7920 1.8160 i, -1.7920 1.8160 i, -0.4160 what is the order of this system? what are the settling time and damping ratio of the system?

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?

What is creep? what is stress relaxation?