This study investigates the impact of magnetic fields on the electrokinetic properties of reservoir fluids and fluid discharge behavior under varying pressure conditions. A custom experimental setup, including a high-pressure column, PVT bomb, electromagnet and multiple measurement and control devices was developed to simulate reservoir conditions. The study examined the influence of magnetic field intensities (40-150 ml) on voltage, resistance and water discharge during pressure variations (1.6-14.4 am). The results demonstrate that magnetic fields positively influence fluid behavior, significantly enhance ion mobility and fluid conductivity, leading to increased water discharge and stabilized fluid flow under high-pressure conditions. This research provides valuable insights into the role of magnetic fields in optimizing fluid transport in porous media, offering potential advancements for enhanced oil recovery techniques.