The pore pressure decreased near the non-reservoir wellbore during the CO2 injection process

Dear TOUGH community users,

      When I used T2WELL/ECO2N to simulate carbon dioxide non-isothermal injection, I found that when using cryogenic supercritical CO2 injection, the pore pressure decreased near the non-reservoir wellbore during the injection process. I would like to ask what the reason is, whether the heat exchange between the CO2 in the wellbore and the surrounding formation leads to the decrease of formation temperature near the wellbore, resulting in the decrease of pore water pressure. And when I couple T2WELL with FLAC3D, I find that this phenomenon will affect the vertical displacement distribution of the model. In the process of injection, the pressure near the wellbore decreases, which leads to the downward displacement. Is this phenomenon reasonable? In the simulation process, the source and sink term is set as the first unit of the wellbore. And thank you in advance for your help.

Best regards.