Uniaxial strain measurements are necessary to predict reservoir compaction and subsidence achieved by quantifying compaction coefficient 𝐶_𝑚 and pore volume compressibility〖 𝐶〗_𝑝.
The drained uniaxial pore volume compressibility (UPVC) is measured under zero radial strain condition (∆𝜀_𝑡=0) and constant overburden stress conditions.
To simulate reservoir depletion, the total axial effective stress is increased in discrete steps of 1000 psi at a rate of 0.5psi/sec to simulate reservoir compaction while monitoring the changes in confining stress, deviatoric stress, axial strain and ultrasonic velocities (Vp,Vs1,Vs2,Vp45).
It is often required to correlate the change in permeability as a function of depletion and reservoir compaction. High accuracy and low pressure pulsation MR-FlowQube pump and high accuracy digital pressure transducers allow estimation of the vertical and horizontal permeability during UPVC test.