Physical simulation test of true triaxial rock mechanics for waterflood dilation in offshore oilfields.

Waterflooding in offshore oil reservoirs often makes the rock expand because the pore pressure and the effective stress change. To study these geomechanical effects, a physical test that can apply true‑triaxial stresses is essential. This project outlines how to build a lab‑scale model that simulates water‑flood‑induced dilation in rock samples. The key elements are: – A simulated triaxial cell that can apply three independent principal stresses, reproducing the deep‑reservoir stress state of offshore fields. – Controlled water injection that mimics a waterflood. – Displacement sensors and pore‑pressure transducers that record volumetric strain and deformation in real time. With this setup you can: – Measure how the rock dilates, how its

permeability changes, and at what pressure shear failure occurs. – Test different injection pressures to see their effect on rock behavior. The support provided focuses on designing the testing rig, integrating the sensors, and setting up data‑acquisition procedures. The data you collect will help you: – Understand how the reservoir deforms, which can prevent casing damage. – Optimize injection parameters for offshore operations. By documenting the experiments systematically, students can plot stress‑strain curves and track volumetric dilation trends, then compare those results with analytical geomechanical models.

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